Subjects -> PHYSICS (Total: 857 journals)
    - ELECTRICITY AND MAGNETISM (10 journals)
    - MECHANICS (22 journals)
    - NUCLEAR PHYSICS (53 journals)
    - OPTICS (92 journals)
    - PHYSICS (625 journals)
    - SOUND (25 journals)
    - THERMODYNAMICS (30 journals)

PHYSICS (625 journals)            First | 1 2 3 4 | Last

Showing 201 - 400 of 741 Journals sorted alphabetically
International Journal of Astronomy and Astrophysics     Open Access   (Followers: 36)
International Journal of Biological, Physical and Chemical Studies     Open Access  
International Journal of Computational Materials Science and Surface Engineering     Hybrid Journal   (Followers: 7)
International Journal of Damage Mechanics     Hybrid Journal   (Followers: 5)
International Journal of Engineering and Applied Physics     Open Access  
International Journal of Fatigue     Hybrid Journal   (Followers: 41)
International Journal of Fracture     Hybrid Journal   (Followers: 14)
International Journal of Geometric Methods in Modern Physics     Hybrid Journal   (Followers: 2)
International Journal of Geophysics     Open Access   (Followers: 5)
International Journal of Heat and Fluid Flow     Hybrid Journal   (Followers: 41)
International Journal of Low Radiation     Hybrid Journal  
International Journal of Low-Carbon Technologies     Open Access   (Followers: 1)
International Journal of Mass Spectrometry     Hybrid Journal   (Followers: 17)
International Journal of Material Forming     Hybrid Journal   (Followers: 1)
International Journal of Materials and Product Technology     Hybrid Journal   (Followers: 2)
International Journal of Mechanical Sciences     Hybrid Journal   (Followers: 14)
International Journal of Mechanics and Materials in Design     Hybrid Journal   (Followers: 7)
International Journal of Medical Physics, Clinical Engineering and Radiation Oncology     Open Access   (Followers: 11)
International Journal of Microstructure and Materials Properties     Hybrid Journal   (Followers: 7)
International Journal of Microwave Science and Technology     Open Access   (Followers: 12)
International Journal of Modeling, Simulation, and Scientific Computing     Hybrid Journal   (Followers: 3)
International Journal of Modern Physics A     Hybrid Journal   (Followers: 15)
International Journal of Modern Physics B     Hybrid Journal   (Followers: 12)
International Journal of Modern Physics C     Hybrid Journal   (Followers: 14)
International Journal of Modern Physics D     Hybrid Journal   (Followers: 13)
International Journal of Modern Physics E     Hybrid Journal   (Followers: 13)
International Journal of Multiphysics     Open Access  
International Journal of Nanomanufacturing     Hybrid Journal  
International Journal of Nanoscience     Hybrid Journal  
International Journal of Nanotechnology     Hybrid Journal   (Followers: 9)
International Journal of Non-Linear Mechanics     Hybrid Journal   (Followers: 8)
International Journal of Nonlinear Dynamics and Control     Hybrid Journal   (Followers: 6)
International Journal of Physics     Open Access   (Followers: 10)
International Journal of PIXE     Hybrid Journal  
International Journal of Plasticity     Hybrid Journal   (Followers: 7)
International Journal of Quantum Information     Hybrid Journal   (Followers: 6)
International Journal of Self-Propagating High-Temperature Synthesis     Hybrid Journal  
International Journal of Solids and Structures     Hybrid Journal   (Followers: 14)
International Journal of Surface Science and Engineering     Hybrid Journal   (Followers: 6)
International Journal of Theoretical and Applied Multiscale Mechanics     Hybrid Journal   (Followers: 3)
International Journal of Theoretical and Mathematical Physics     Open Access   (Followers: 13)
International Journal of Theoretical Physics     Hybrid Journal   (Followers: 17)
International Journal of Thermal Sciences     Hybrid Journal   (Followers: 18)
International Journal on Smart Sensing and Intelligent Systems     Open Access  
International Letters of Chemistry, Physics and Astronomy     Open Access   (Followers: 8)
International Materials Reviews     Hybrid Journal   (Followers: 15)
Iranian Journal of Medical Physics     Open Access  
Iranian Journal of Science and Technology, Transactions A : Science     Hybrid Journal  
Ironmaking & Steelmaking     Hybrid Journal   (Followers: 4)
Izvestiya, Atmospheric and Oceanic Physics     Full-text available via subscription   (Followers: 1)
Izvestiya, Physics of the Solid Earth     Hybrid Journal   (Followers: 2)
Jambura Physics Journal     Open Access  
JETP Letters     Hybrid Journal   (Followers: 3)
Journal of Adhesion Science and Technology     Hybrid Journal   (Followers: 10)
Journal of Advanced Physics     Full-text available via subscription   (Followers: 13)
Journal of Advances in Physics     Open Access   (Followers: 13)
Journal of Applied Mathematics and Physics     Open Access   (Followers: 9)
Journal of Applied Mechanics and Technical Physics     Hybrid Journal   (Followers: 7)
Journal of Applied Physics     Hybrid Journal   (Followers: 69)
Journal of Applied Spectroscopy     Hybrid Journal   (Followers: 9)
Journal of Astrophysics     Open Access   (Followers: 33)
Journal of Astrophysics and Astronomy     Open Access   (Followers: 58)
Journal of Building Physics     Hybrid Journal   (Followers: 1)
Journal of Chromatographic Science     Hybrid Journal   (Followers: 15)
Journal of Complex Networks     Hybrid Journal   (Followers: 1)
Journal of Composite Materials     Hybrid Journal   (Followers: 242)
Journal of Computational and Theoretical Transport     Hybrid Journal   (Followers: 2)
Journal of Computational Methods in Physics     Open Access   (Followers: 8)
Journal of Computational Physics     Hybrid Journal   (Followers: 59)
Journal of Computational Physics : X     Open Access   (Followers: 1)
Journal of Contemporary Physics (Armenian Academy of Sciences)     Hybrid Journal   (Followers: 9)
Journal of Dynamic Systems, Measurement, and Control     Full-text available via subscription   (Followers: 14)
Journal of Elasticity     Hybrid Journal   (Followers: 7)
Journal of Electron Spectroscopy and Related Phenomena     Hybrid Journal   (Followers: 3)
Journal of Electronic Materials     Hybrid Journal   (Followers: 3)
Journal of Electronics Cooling and Thermal Control     Open Access   (Followers: 9)
Journal of Engineering Materials and Technology     Full-text available via subscription   (Followers: 17)
Journal of Engineering Physics and Thermophysics     Hybrid Journal   (Followers: 2)
Journal of Experimental and Theoretical Physics     Hybrid Journal   (Followers: 4)
Journal of Experimental Physics     Open Access   (Followers: 3)
Journal of Fire Sciences     Hybrid Journal   (Followers: 6)
Journal of Geometry and Physics     Full-text available via subscription   (Followers: 2)
Journal of Geophysical Research : Space Physics     Full-text available via subscription   (Followers: 135)
Journal of Gravity     Open Access   (Followers: 4)
Journal of High Energy Astrophysics     Full-text available via subscription   (Followers: 25)
Journal of High Energy Physics     Hybrid Journal   (Followers: 17)
Journal of High Energy Physics, Gravitation and Cosmology     Open Access   (Followers: 2)
Journal of Hydrogels     Full-text available via subscription  
Journal of Hyperspectral Remote Sensing     Open Access   (Followers: 23)
Journal of Imaging     Open Access   (Followers: 3)
Journal of Information Display     Open Access   (Followers: 1)
Journal of Intelligent Material Systems and Structures     Hybrid Journal   (Followers: 8)
Journal of Lightwave Technology     Hybrid Journal   (Followers: 14)
Journal of Low Frequency Noise, Vibration and Active Control     Open Access   (Followers: 8)
Journal of Luminescence     Hybrid Journal   (Followers: 2)
Journal of Materials Engineering and Performance     Hybrid Journal   (Followers: 22)
Journal of Materials Physics and Chemistry     Open Access   (Followers: 7)
Journal of Materials Science     Hybrid Journal   (Followers: 25)
Journal of Materials Science : Materials in Electronics     Hybrid Journal   (Followers: 2)
Journal of Materials Science : Materials in Medicine     Hybrid Journal   (Followers: 1)
Journal of Mathematical Fluid Mechanics     Hybrid Journal   (Followers: 10)
Journal of Mathematical Physics     Hybrid Journal   (Followers: 25)
Journal of Medical Imaging and Health Informatics     Full-text available via subscription  
Journal of Medical Ultrasonics     Hybrid Journal   (Followers: 2)
Journal of Micro/Nanolithography MEMS and MOEMS     Hybrid Journal   (Followers: 24)
Journal of Molecular Spectroscopy     Hybrid Journal   (Followers: 6)
Journal of Motor Behavior     Hybrid Journal   (Followers: 8)
Journal of Multiscale Modeling     Hybrid Journal   (Followers: 1)
Journal of Nepal Physical Society     Open Access  
Journal of Nondestructive Evaluation     Hybrid Journal   (Followers: 11)
Journal of Nonlinear Dynamics     Open Access   (Followers: 6)
Journal of Nonlinear Mathematical Physics     Hybrid Journal   (Followers: 2)
Journal of Nuclear Physics, Material Sciences, Radiation and Applications     Open Access   (Followers: 6)
Journal of Optics     Hybrid Journal   (Followers: 17)
Journal of Photonics for Energy     Hybrid Journal   (Followers: 2)
Journal of Physical and Chemical Reference Data     Hybrid Journal   (Followers: 4)
Journal of Physical Chemistry B     Hybrid Journal   (Followers: 48)
Journal of Physical Chemistry C     Hybrid Journal   (Followers: 36)
Journal of Physical Oceanography     Hybrid Journal   (Followers: 18, SJR: 2.461, CiteScore: 3)
Journal of Physical Organic Chemistry     Hybrid Journal   (Followers: 8)
Journal of Physics and Chemistry of Solids     Hybrid Journal   (Followers: 3)
Journal of Plasma Physics     Hybrid Journal   (Followers: 21)
Journal of Polymer Science Part B: Polymer Physics     Hybrid Journal   (Followers: 22)
Journal of Porous Materials     Hybrid Journal   (Followers: 4)
Journal of Porphyrins and Phthalocyanines     Hybrid Journal   (Followers: 1)
Journal of Quantitative Spectroscopy and Radiative Transfer     Hybrid Journal   (Followers: 3)
Journal of Reinforced Plastics and Composites     Hybrid Journal   (Followers: 30)
Journal of Rheology     Full-text available via subscription   (Followers: 7)
Journal of Sandwich Structures and Materials     Hybrid Journal   (Followers: 4)
Journal of Scientific Research     Open Access  
Journal of Sensors     Open Access   (Followers: 25)
Journal of Sol-Gel Science and Technology     Hybrid Journal  
Journal of Solid State Physics     Open Access   (Followers: 8)
Journal of Spectroscopy     Open Access   (Followers: 6)
Journal of Superconductivity and Novel Magnetism     Partially Free   (Followers: 1)
Journal of Synchrotron Radiation     Open Access   (Followers: 3)
Journal of the American Society for Mass Spectrometry     Hybrid Journal   (Followers: 32)
Journal of the ICRU     Hybrid Journal  
Journal of the Korean Physical Society     Partially Free  
Journal of the Physical Society of Japan     Hybrid Journal   (Followers: 2)
Journal of Theoretical and Applied Physics     Open Access   (Followers: 9)
Journal of Tissue Engineering     Open Access   (Followers: 6)
Journal of Ultrasound in Medicine     Full-text available via subscription   (Followers: 11)
Journal of Vibration and Control     Hybrid Journal   (Followers: 42)
Journal of Visualization     Hybrid Journal   (Followers: 3)
Journal of Zhejiang University : Sceince A     Hybrid Journal  
JPSE (Journal of Physical Science and Engineering)     Open Access  
Jurnal Fisika     Open Access  
Jurnal Ilmiah Pendidikan Fisika Al-Biruni     Open Access  
Jurnal NEUTRINO     Open Access  
Jurnal Online of Physics     Open Access  
Jurnal Pendidikan Fisika Indonesia (Indonesian Journal of Physics Education)     Open Access  
Jurnal Penelitian Fisika dan Aplikasinya     Open Access  
Jurnal Penelitian Sains (JPS)     Open Access  
Karbala International Journal of Modern Science     Open Access  
Kasuari : Physics Education Journal     Open Access  
La Rivista del Nuovo Cimento     Hybrid Journal  
Lasers in Surgery and Medicine     Hybrid Journal   (Followers: 1)
Latvian Journal of Physics and Technical Sciences     Open Access  
Letters in High Energy Physics     Open Access  
Letters in Mathematical Physics     Hybrid Journal   (Followers: 4)
Light : Science & Applications     Open Access   (Followers: 3)
Living Reviews in Computational Astrophysics     Open Access   (Followers: 3)
Living Reviews in Relativity     Open Access  
Living Reviews in Solar Physics     Open Access   (Followers: 1)
Lubrication Science     Hybrid Journal   (Followers: 2)
Macalester Journal of Physics and Astronomy     Open Access   (Followers: 5)
Machining Science and Technology: An International Journal     Hybrid Journal   (Followers: 2)
Magnetic Resonance     Open Access  
Magnetic Resonance Letters     Open Access  
Magnetic Resonance Materials in Physics, Biology and Medicine     Hybrid Journal   (Followers: 3)
MAPAN     Hybrid Journal  
Mass Spectrometry Reviews     Hybrid Journal   (Followers: 31)
Matéria (Rio de Janeiro)     Open Access  
Materials and Design     Open Access   (Followers: 47)
Materials at High Temperatures     Full-text available via subscription   (Followers: 3)
Materials Chemistry and Physics     Full-text available via subscription   (Followers: 15)
Materials Research Bulletin     Hybrid Journal   (Followers: 25)
Materials Research Innovations     Hybrid Journal   (Followers: 1)
Materials Science     Hybrid Journal   (Followers: 7)
Materials Science and Engineering: A     Hybrid Journal   (Followers: 44)
Materials Science and Engineering: B     Hybrid Journal   (Followers: 22)
Materials Science and Engineering: R: Reports     Hybrid Journal   (Followers: 15)
Materials Science and Technology     Hybrid Journal   (Followers: 40)
Materials Today Physics     Hybrid Journal   (Followers: 1)
Matériaux & Techniques     Full-text available via subscription   (Followers: 2)
Mathematical Physics, Analysis and Geometry     Hybrid Journal   (Followers: 3)
Mathematics and Mechanics of Solids     Hybrid Journal   (Followers: 3)
Matter and Radiation at Extremes     Open Access   (Followers: 1)
Meccanica     Hybrid Journal   (Followers: 1)
Mechanics of Advanced Materials and Structures     Hybrid Journal   (Followers: 6)
Mechanics of Materials     Hybrid Journal   (Followers: 25)
Mechanics of Time-Dependent Materials     Hybrid Journal   (Followers: 2)
Mechanics Research Communications     Hybrid Journal   (Followers: 4)
Medical Physics     Hybrid Journal   (Followers: 17)
Micro and Nano Systems Letters     Open Access   (Followers: 6)
Microfluidics and Nanofluidics     Hybrid Journal   (Followers: 11)
Microporous and Mesoporous Materials     Hybrid Journal   (Followers: 9)
Modern Instrumentation     Open Access   (Followers: 57)
Modern Physics Letters A     Hybrid Journal   (Followers: 14)

  First | 1 2 3 4 | Last

Similar Journals
Journal Cover
International Journal of Modern Physics B
Journal Prestige (SJR): 0.249
Citation Impact (citeScore): 1
Number of Followers: 12  
 
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 0217-9792 - ISSN (Online) 1793-6578
Published by World Scientific Homepage  [120 journals]
  • Evaluating the effect of different photon beams on intensity modulated
           radiation therapy for liver cancer

    • Free pre-print version: Loading...

      Authors: S. Hassn, Khaled M. El-Shahat, M. F. Eissa, A. H. Aly
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      We aimed to evaluate dosimetrically the effect of 6 MV, 10 MV and dual 6 and 10 MV photon beam energies on the liver of most cancers using steep and shoot IMRT methods, and we investigate a few important parameters, including dose, conformity index (CI) and homogeneity index (HI). The beams were arranged based on different angles. The same optimization constraints were applied for each energy planning and all other parameters, such as number of beams and beam angles, were kept constant. The dose-volume histograms (DVHs) for the 6 MV, 10 MV and dual energy plans were compared for the planning target volume (PTV) and organs at risk (OAR). Twenty-eight cases ([math]) of liver SBRT patients formerly handled the use of steep and shoot IMRT techniques. Three plans with identical beam geometries were created using 6 MV, 10 MV and dual energy. In the central axis, the powerful intensity from each beam was calculated, and the values were averaged.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-05-12T07:00:00Z
      DOI: 10.1142/S0217979222500734
       
  • Comparative study of 1D defective photonic structures composed of single
           and double defect layers

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      Authors: S. K. Awasthi, Arafa H. Aly, Basma A. Mohamed, A. M. Ameeen, Z. S. Matar, M. A. Mohaseb
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      In this study, we investigated the sensing capabilities of 1D defective photonic crystal designs composed of single and double defect layers. These structures can detect and distinguish minor refractive index changes of various organic samples infiltrated one by one into defect layer regions of the respective designs. We have used the standard transfer matrix method to analyze the transmission properties of both structures at normal incidence. The normal incidence has been chosen to overcome the experimental difficulties associated with oblique incidence. The performance of the proposed designs has been examined by measuring the shift in the position of the defect modes inside PBGs of respective structures depending upon the change in the refractive index of various organic solvents, called samples. We can also find adulteration in the organic samples by comparing the observed data with the experimentally available standard data of pure organic samples. Moreover, double defect photonic structure possesses pair of two defect modes inside PBG. These pair of defect modes are located on either side of bandgap edges that cannot be found in 1D defective PCs composed of a single defect. This intriguing property of double defect PC structure is due to the quasi Fabry–Perot cavity nature of the structure. Finally, we have compared sensing and detection features of both the designs made up of single and double defect photonic structures. It has been noticed that the double defect photonic structure also improves the transmittance of defect peak to unity compared to the single defect photonic structure. Moreover, the FWHM of two pairs of defect modes in double defect PC are opposite in nature. This remarkable feature of double defect photonic design may be very useful for improving the performance of photonic bio-sensors. It may be very helpful for designing some advanced bio-sensing designs whose defect mode properties are mirror image in nature.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-05-12T07:00:00Z
      DOI: 10.1142/S0217979222500886
       
  • Band gap of two-dimensional topological insulator with a double quantum
           well structure

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      Authors: Shijie Li, Tongsheng Xia
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      The bulk energy gap of two-dimensional (2D) topological insulators (TIs) is generally small, leading to their study being limited to extremely low temperatures, thus increasing the energy gap of 2D TIs is an urgent challenge. It has been reported that the compressive strain could enhance the band gap of the 2D TI to about 55 meV. Based on this result, this paper further calculated the band structures of 2D TIs with a special structure, i.e., the double quantum well, and especially evaluated their band gaps. We found that by choosing different internal barrier thicknesses, asymmetry factors and electric fields, numerical results show that the energy gap of the TIs with double quantum well (DQW) structure can further reach over 70 meV. This result might be significant for the possible applications of 2D TIs.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-05-12T07:00:00Z
      DOI: 10.1142/S0217979222500898
       
  • Ab-initio calculation of electronic, mechanical, optical and phonon
           properties of ZrXH3([math], Ni and Cu): A key towards potential hydrogen
           storage materials

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      Authors: Samia Razzaq, G. Murtaza, Rana Muhammad Arif Khalil, Nazir Ahmad, Hafiz Hamid Raza
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      Hydrogen storage is attractive in research interests due to clean, renewable and green energy properties of hydrogen. Therefore, frequently research studies are carried out to find suitable and innovative materials that fulfill the criteria of hydrogen storage materials. First-principles calculations of ZrXH3([math], Ni and Cu) compounds are carried out to find their hydrogen storage properties by using CASTEP code. Structural, mechanical, electronic and optical properties of these materials have been studied. Gravimetric hydrogen storage densities of these materials are also calculated. Electronic properties of these hydrides are also discussed which show the metallic nature of these hydrides. Moreover, mechanical properties identified through elastic constants proved their mechanical stability by satisfying Born stability criteria. Bulk, shear, Young’s moduli, Poisson’s ratio and Vickers hardness show that these three compounds are hard, ductile and have good resistance toward change. We have also calculated the phonon dispersion curves and phonon density of states by using density functional perturbation theory.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-05-12T07:00:00Z
      DOI: 10.1142/S0217979222500904
       
  • The effect of environment to the Hodgkin–Huxley Neuron

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      Authors: Bobin Li
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      Based on the Hodgkin–Huxley (HH) model, a model of calculation is constructed to simulate the neuron. In this paper, how the factors affect the function of HH model is carefully analyzed. It is indicated that temperature is a key role for performance of HH model, under different parameters including temperature, external stimulation, etc.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-05-12T07:00:00Z
      DOI: 10.1142/S0217979222500941
       
  • The modified simplest equation procedure for conformable time-fractional
           Boussinesq equations

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      Authors: Waseem Razzaq, Asim Zafar, Arzu Akbulut
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      In this paper, we used the traveling wave transformation to find out the exact solutions of the conformable time fractional differential equations with the help of the Modified simplest equation procedure. We applied the given procedure to two different equations which are conformable time-fractional Boussinesq and coupled Boussinesq equations. First, we reduced the given equations to ordinary differential equations using wave transformations. Then, we applied the procedure to the given equations. We obtained hyperbolic, trigonometric and rational solutions. We gave the 3D plots, 2D plots and contour plots for some obtained solutions. According to our results, we can say the given method is effective, powerful and gives simple, reliable solutions compared to the other methods. All obtained solutions were checked with the help of Mathematica.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-05-12T07:00:00Z
      DOI: 10.1142/S0217979222500953
       
  • A partial offloading algorithm based on intelligent sensing

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      Authors: Zehra Pinar Izgi, Fatma Nur Saglam, S. Sahoo, Hadi Rezazadeh, Lanre Akinyemi
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      In this paper, the exact solutions of the logarithmic nonlinear Schrödinger equation (log-NLS) types, namely, the logarithmic perturbed nonlinear Schrödinger equation (log-pert-NLS), logarithmic improved nonlinear Schrödinger (log-imp-NLS) and logarithmic perturbed improved nonlinear Schrödinger (log-pert-imp-NLS) are examined. These solutions are attained by eliminating logarithmic nonlinearity. The solutions show different Gaussian solitary patterns in different conditions. The dynamics of the obtained solutions are analyzed by means of two-dimensional (2D) and three-dimensional (3D) graphs.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-05-12T07:00:00Z
      DOI: 10.1142/S0217979222500977
       
  • Robustness of synchronizability in windmill networks with node failures

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      Authors: Defu Zhang, Dan Xu, Jing Chen, Weigang Sun
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      In this paper, the synchronizability characterized by the Laplacian spectrum is applied to windmill networks where three types of parameters are introduced to control the number of deleted nodes. Using the network’s structures, exact solutions of the Laplacian eigenvalues are obtained and metrics of the synchronizability are correspondingly shown. Relationships between the synchronizability and the introduced parameters are presented. Then, the synchronizability of models with different settings of node failures is compared. The obtained results reveal distinct synchronizabilities originating from intrinsic structures of models and the setting forms of node failures. Finally, numerical examples are provided to verify the effectiveness of theoretical analysis.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-05-12T07:00:00Z
      DOI: 10.1142/S0217979222500989
       
  • First-principles study of structural, electronic, elastic and dielectric
           properties of RbLi2(NH[math], LiH and LiNH2

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      Authors: Zhi-Xin Bai, Wei Zeng, Bin Tang, Dai-He Fan, Qi-Jun Liu, Cheng-Lu Jiang, Xiang-Hui Chang
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      Based on the first-principles density-functional theory, the structural, electronic, elastic and dielectric properties of RbLi2(NH[math], LiH and LiNH2 are calculated. We have analyzed the bond information in detail, where the atom Li in crystal is represented in ionic characteristics mostly. The small covalent bond behaviors are also captured between atom Li and others. The ionic characteristics with tiny covalent bonds are obviously beneficial to electrons for storage capacity and transferring. The mechanical properties of three crystals reveal that LiH has a strong resistance to deformation. It is predicted that LiH has a long service life as a battery in terms of deformation. The dielectric constant reveals that LiH has a better storage capacity than that of LiNH2. Additionally, LiH has low formation energy, where the harder substance is, the easier formation is.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-05-07T07:00:00Z
      DOI: 10.1142/S0217979222500746
       
  • An elastomeric composite with tunable thermal and mechanical properties
           via liquid metal-flake graphite multiphase fillers

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      Authors: Ao Li, Peng Wang, Jin-Yang Li, Zheng-Quan Xiong, Yin Huang
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      Soft composites with improved and tunable thermal conductivity, stretchability and load-bearing capacity may find fascinating applications in soft robotics and wearable devices. Unfortunately, thermally conductive soft composites with solid fillers usually show serious degradation in stretchability, while those with liquid fillers usually possess a weak load-bearing capacity. To overcome these limitations, an elastomeric composite with solid–liquid multiphase fillers, named as pre-mixed LM&FG/SR composite, is proposed here by incorporating flake graphite (FG) with high thermal conductivity into liquid metal (LM) and then dispersing the mixture in a soft silicone elastomer (SR). In comparison with the LM/SR composite and the FG/SR composite, the pre-mixed LM&FG/SR composite gains the highest thermal conductivity under the strain-free state as it possesses both the excellent thermal conductivity of the FG filler and the high-volume fraction of the LM filler. In addition, by controlling the volume fraction of the multiphase fillers and the volume ratio of LM to FG, the pre-mixed LM&FG/SR composite can gain tunable thermal and mechanical properties under the strained state and thus be applicable to complex situations in which both excellent heat-conducting capability and certain load-bearing capacity are required.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-05-07T07:00:00Z
      DOI: 10.1142/S0217979222500783
       
  • Impact of magnetized radiative flow of sutterby nanofluid subjected to
           convectively heated wedge

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      Authors: W. A. Khan, Z. Arshad, A. Hobiny, S. Saleem, A. Al-Zubaidi, M. Irfan
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      In the recent years, nanotechnologies have been widely used in several fields regarding their rapid developments which creates a lot of prospects for researchers and engineers. More specifically, replacement of conventional liquids with nanoliquids is considered as an innovative solution to heat transfer problems. Keeping the aforesaid pragmatism of nanofluid in view, we have considered a time-dependent mathematical model to formulate the heat sink–source-based Sutterby liquid under thermophoretic and Brownian movements with wedge geometry. Additionally, convective condition, heat sink/source and chemical reaction properties are considered. Appropriate similarity transformations are used to obtain ordinary differential equations (ODEs) from the corresponding PDEs. Furthermore, coupled ODEs are tackled numerically by technique bvp4c in MATLAB. Discussion for thermal and concentration distribution is also presented graphically. Moreover, the temperature field enhance for Brownian parameter and decays for concentration field in this study. A similar impact has been examined for unsteadiness and chemical reaction parameters on concentration plot. Thermal distribution declines for boosted Prandtl number.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-05-07T07:00:00Z
      DOI: 10.1142/S0217979222500795
       
  • Molecular characteristics of salty ions in phospholipid bilayer under
           electric field

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      Authors: Yanxi Ranzhou, Xiao Wang
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      The diffusion of salty ions has a great impact on the motor ability of muscle, and revealing the diffusion properties of ions with different concentrations in phospholipid bilayer under electric field is of great significance to the study of ion loss on the skin. In this paper, the diffusion properties of charged ions under electric field are studied by molecular dynamics (MD) simulations. Mean square displacement (MSD) was studied to reveal the displacement of ions in phospholipid bilayer. In addition, the relative concentration is also utilized to reveal the local concentration of ions in the direction of the electric field. The data shows that the negatively charged ions (Cl[math], HCO3 HCO[math], SO[math] have much stronger diffusion capacity, compared to the positive charged ions (Na[math], K[math], Mg[math] in the simulation systems. Furthermore, the diffusion property of ions becomes stronger with the increase of ion concentration.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-05-07T07:00:00Z
      DOI: 10.1142/S0217979222500801
       
  • Photoelectric properties of TlGa[math]In[math]Se2 ([math]) single crystals

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      Authors: E. M. Gojayev, G. N. Mammadova, R. S. Rehimov, P. F. Aliyeva
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      This work presents the results of a study of the photoelectric properties of single crystals of the TlGa[math]In[math]Se2 system of solid solutions based on TlInSe2 with high photo and tensile sensitivity and switching properties with memory and TlGaSe2 with high photosensitivity in the visible and infrared regions of the spectrum. Single crystals of the above alloys were grown by the Bridgman–Stockbarger methods. Investigated alloys correspond in [math], 0.1, 0.2, 0.3, 0.4, 0.7, 0.8, 0.9, 1 compounds. It was revealed that these alloys are photosensitive materials, and with a decrease in [math] from 1 to 0, a shift of the spectral characteristic maxima from 0.57[math][math]m to 1.35[math][math]m is observed. The specific resistance at 77–300 K and the bandgap of the investigated phases have been determined. It was found that with an increase in the content of Ga in the composition of solid solutions, the bandgap increases from 1.23 eV to 2.15 eV.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-05-07T07:00:00Z
      DOI: 10.1142/S0217979222500837
       
  • Reconstruction of bionic models and nanomechanical behavior of dragonfly
           membranous wings

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      Authors: Yanru Zhao, Huimeng Yang, Dongsheng Wang, Geng Wang
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      Dragonflies fly in flapping wing flight, bearing a variety of variable forces during flight. To comprehend and study from the biological system and then carry out technological innovation, the characteristic point cloud data of dragonfly wings were obtained and the 3D geometric models were reconstructed. The biomechanical characteristics of Costa, Radius and Postal veins of the wings were examined by a nanoindenter. It was shown that the reduced modulus and nanohardness of Radius of dragonfly forewings and hindwings are large. The maximum reduced modulus and nanohardness of Costa, Radius and Postal veins of hindwings appear at the place 0.7L of dragonfly wings. The biomechanical characteristics of dragonfly wings were researched and then the deformations and stresses of the bionic models under the uniform load were investigated. It was shown that the dragonfly wings are less deformed under the uniform load and the chief veins have stronger stability and bearing capacity. The combinations of the main veins and branch veins can improve the overall strength and load-bearing capacity of dragonfly wings. It tries to explore the structural models of imitating dragonfly wings with good load-bearing capacity and, then, were used to guide the plan and manufacturing of thin film and offer novel ideas and methods for the study of thin film.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-05-07T07:00:00Z
      DOI: 10.1142/S0217979222500849
       
  • Hybrid solutions of a [math]-dimensional generalized B-type
           Kadomtsev–Petviashvili equation

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      Authors: Xin Chen, Dan Zhao, Zhaqilao
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      The simplified form of the Hirota bilinear method is used to investigate a [math]-dimensional generalized B-type Kadomtsev–Petviashvili (gBKP) equation, and the five-soliton is formally derived. Applying the long-wave limit to the five-soliton and establishing the complex conjugate relations in the parameters of the five-soliton, five types of hybrid solutions of the [math]-dimensional gBKP equation are obtained. Furthermore, the dynamical behaviors of the hybrid solutions are systematically analyzed via numerical simulations.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-05-07T07:00:00Z
      DOI: 10.1142/S0217979222500850
       
  • Effect of RuO2 crystallinity and particle size on electrical property of
           LTCC resistors

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      Authors: Hong Wei, Zhen Wang, Fenglin Wang, Weijun Zhang
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      The crystallization and sintering process of RuO[math]xH2O nanoparticles have been investigated in this paper. The effect of RuO2 crystallinity and particle size on the sheet resistance of RuO2-based resistor paste after being co-fired with CaO–B2O3–SiO2 green tapes has been reported. The results show that the nanoparticles are not fully crystallized below 600[math]C, and the effect of high-density defects, such as grain boundaries and dislocations on the residual resistance ([math] of RuO2 particles, is significant. So, the sheet resistance decreases with the increase of crystallinity and the weakening of electron wave scattering. Above 600[math]C, the effect of crystal imperfections on [math] is greatly weakened. However, the number of conductive chains formed in co-fired resistor decreases with the increase of particle size, thus the sheet resistance gradually raises. When the dwelling time is increased to 3 h, the RuO2 is mostly crystallized and the effect of crystal imperfections on [math] is negligible, and the sheet resistance mainly depends on particle size of RuO2. Using RuO2 particles with low crystallinity, small size and narrow particle-size distribution as conductive phase is expected to solve the problem of poor sheet resistance uniformity in high resistance paste for LTCC application.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-05-07T07:00:00Z
      DOI: 10.1142/S0217979222500862
       
  • Adjustable shunt-current intensity circuit and system for current
           conduction treatment of epilepsy

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      Authors: Changhua You, Ning Xue, Lei Yao, Pan Yao, Tiezhu Liu, Zhen Fang, Li Li, Ping Ding, Shuli Liang, Chunxiu Liu
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      In this paper, we developed a shunt-current intensity self-adjustable closed-loop control circuit system for current conduction treatment in temporal lobe epilepsy. To examine the dose-response relationship between conductive intensity and therapeutic outcomes of current conduction treatment, the control system consists of neural signal recording module for high-speed data rate acquisition, signal amplification and pre-processing, current shunt module for current conduction, data transmission and control module for real-time data communication with the personal computer and on-off of current conduction. Multithread and queue software architecture was implemented to ensure real-time data transmission, display and analysis by LabVIEW software. Results indicate that the input noise of the system is less than 2 [math]Vrms, signal frequency bandwidth range is 1 Hz[math]10 kHz, and the shunt-current detection range is 0.1–3000 [math]A with the accuracy of above 99.985%, meeting the requirements for the detection of neural electrophysiological signal and the research on the dose-response relationship between conductive intensity and therapeutic outcomes of electronic conduction treatment.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-05-07T07:00:00Z
      DOI: 10.1142/S0217979222500874
       
  • Temperature effects on liquid and crystalline state of SW-Germanium in
           supercooled region

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      Authors: Arvind K. Gautam, Arisha Sharma, Sakshi Srivastava, Aadarsh Kumar
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      Germanium is one of the important substances existing in liquid, solid or gaseous states at different thermodynamic conditions. It shows interesting behavior in supercooled region including anomalous changes with thermodynamic properties. The pure and crystalline germanium can be considered as semiconductor as it represents a quite similar appearance as elemental silicon. Further, this substance (i.e., Germanium (Ge)) shows many thermodynamic similarities just like silicon, water and various other tetrahedral liquids (i.e., the liquid substance which shows the connection of its central atom with four faces of substituents located at the corners of a tetrahedron in the structure forming a polyhedral angle) which represents density maximum at some certain supercooled states. It is very difficult to simulate this substance at or near the transition temperature ([math]) as it shows anomalous dependency with respect to temperature. Therefore, we want to focus our study on this material to understand its detailed behavior in supercooled region. This study represents a detailed analysis on the liquid-crystal phase transition of this substance (germanium) by using the suitable Stillinger–Weber potential model. We performed molecular dynamic (MD) simulation technique with canonical ensemble (NVT) to analyze liquid-crystal phase transition more significantly. Further, we predicted some interesting features of crystalline Germanium and found its stability at or near the transition temperature. The computed results have been found consistent mostly with the literature. This study would be helpful to define the qualitative germanium with consistent thermodynamic conditions at industrial level.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-05-07T07:00:00Z
      DOI: 10.1142/S0217979222500916
       
  • Effect of interface morphology on thermal contact resistance in thermal
           management of electronic devices

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      Authors: Yu-Zheng Chen, Shi-Wei Feng, Ya-Min Zhang, Xin He, Kun Bai, Xuan Li
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      The interfacial thermal resistance between two solid materials is usually obvious in thermal management technology, but there is still no way to eliminate it nor uniform measurement standard. When taking thermal measurements because the surface roughness of instrument probe and device package directly affects the interface morphology, the change of total thermal resistance caused by the thermal contact resistance (TCR) fluctuations disturbs the accuracy of internal thermal analysis of device. We prepared samples with different surface roughness and performed thermal measurements on them, compared with test under vacuum environment and the condition filled with thermal interface materials, respectively. We found the heat-transfer mechanism of interface. More importantly, it is shown that in the interval of surface roughness [math], the TCR shows good consistency when filled with thermal interface materials. This result will help to improve the convenience of measurement for the accuracy of thermal measurement technology.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-05-07T07:00:00Z
      DOI: 10.1142/S0217979222500928
       
  • Optimal system of Lie subalgebra for symmetry reductions, group invariant
           solutions and exact solutions to the coupled Hirota–Maccari system
           driving pulse propagation in optical fiber

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      Authors: Vinita, S. Saha Ray
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      In this paper, Lie symmetry analysis has been proposed by utilizing the Lie group of continuous point transformation for obtaining the new exact soliton solutions of the (2+1)-dimensional Hirota–Maccari system. Lie infinitesimals and possible geometric vector fields are obtained by applying the third-order prolongation on this system. Also, their commutative product and adjoint relations have been presented in Tables 1 and 2. By considering the resulting symmetries, one-dimensional optimal system of Lie subalgebra is obtained. Meanwhile, the Hirota–Maccari system is reduced to a system of ordinary differential equations with the help of optimal subalgebras. Furthermore, the simplest equation method has been used to obtain the abundant exact soliton solutions of the reduced system. At last, conservation laws of Hirota–Maccari system have been extracted by utilizing the generalized “new conservation theorem” invoked by Ibragimov.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-05-07T07:00:00Z
      DOI: 10.1142/S021797922250093X
       
  • Riemann–Hilbert problems of a nonlocal reverse-time AKNS system of
           six-order and dynamical behaviors of [math]-soliton

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      Authors: Ahmed M. G. Ahmed, Alle Adjiri
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      In this paper, we solve nonlinear nonlocal reverse-time six-component sixth-order AKNS system. We used reverse-time reduction to reduce the coupled system to an integrable sixth-order nonlinear Schrödinger-type equation. Starting from the spectral problem of the AKNS system, a Riemann–Hilbert problem will be formulated. This formulation allows us to generate soliton solutions by using the vectors lying in the kernel of the matrix Jost solutions. When reflection coefficients are zeros, the jump matrix is identity and the corresponding Riemann–Hilbert problem yields soliton solutions, leading to explore their dynamics.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-04-28T07:00:00Z
      DOI: 10.1142/S0217979222500631
       
  • A fast difference scheme on a graded mesh for time-fractional and space
           distributed-order diffusion equation with nonsmooth data

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      Authors: Mojtaba Fardi, Yasir Khan
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      The time-fractional and space distributed-order diffusion equation with a singularity at the initial time is investigated in this paper. For the solution of this equation, we propose a new difference scheme on a graded mesh. The theoretical underpinning for the suggested procedure is presented, which includes the stability and convergence of the difference scheme. Furthermore, the difference strategy proves to be unconditionally stable in this research. Additionally, we demonstrate that the difference technique is convergent and that the temporal convergence rate is faster than when a uniform mesh uses. Finally, a test example is provided to ensure that the theoretical analysis is accurate.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-04-28T07:00:00Z
      DOI: 10.1142/S021797922250076X
       
  • Infinite conservation laws and new solutions of (3+1)-dimensional
           generalized Konopelchenko–Dubrovsky–Kaup–Kupershmidt equation

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      Authors: Shi-Jie Zhang, Taogetusang Bao
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      In this paper, a (3+1)-dimensional generalized Konopelchenko–Dubrovsky–Kaup–Kupershmidt equation (gKDKK) is investigated. Based on Bell polynomial theory, the bilinear form, Bilinear Bäcklund transformation, Lax pair and infinite conservation laws of the equation are obtained. Lump solution and half periodic kink solution are obtained by combining the test function with bilinear form. Furthermore, with the help of the variable separation method, we obtain some new compound solutions composed of exponential function, trigonometric function, hyperbolic function, rational function and Jacobi elliptic function in various forms. Using computer software to draw the three-dimensional diagram and profile of the solutions, the dynamic properties of the solutions are analyzed.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-04-28T07:00:00Z
      DOI: 10.1142/S0217979222500825
       
  • Heterogeneous willingness induced by different states promotes the
           evolution of cooperation

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      Authors: Fan Zhang, Juan Wang, Hongyu Gao, Xiaopeng Li, Chengyi Xia
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      In reality, the spread of strategies is often affected by individual willingness, which may be further influenced by the individual state. Herein, based on the spatial prisoner’s dilemma game, we propose a novel co-evolutionary model to explore the role of heterogeneous willingness induced by different states in the evolution of cooperation. In detail, we randomly set players in free or busy states, their states will remain constant throughout the evolution once being set. Within our model, the busy player has a quite small probability to teach one of his neighbors, and meanwhile, the busy neighbor will consider his learning willingness to imitate this strategy. However, the willingness of free player to teach or learn is not affected. Furthermore, we mainly discuss the impact of two different update schemes on the collective cooperation. For the Scheme I, the focal player [math] will randomly select one of his neighbors [math] as the teaching object, while for the Scheme II, the focal player [math] tends to choose one of his neighbors with the lower payoff to teach his strategy. Through lots of numerical simulations, we find that there exists an optimal parameter [math] and [math] to promote the evolution of cooperation most effectively. In addition, the Scheme II performs better in alleviating social dilemmas.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-04-25T07:00:00Z
      DOI: 10.1142/S0217979222500576
       
  • New optical analytical solutions to the full nonlinearity form of the
           space–time Fokas–Lenells model of fractional-order

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      Authors: Ananya Tripathy, Subhadarshan Sahoo, Hadi Rezazadeh, Zehra Pinar Izgi
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      In this paper, the full nonlinearity form of the space–time fractional Fokas–Lenells equation is scrutinized to get new analytical solutions. To achieve this, a convenient method is applied namely, a new Kudryashov method. The achieved solutions show pulse propagation in different wave patterns such as singular bell shape, peakon, singular anti-bell shape, dark, anti-bell and bright solutions. These physical characteristics are studied thoroughly by the graphical representation, which shows the fruitfulness and functionality of the proposed method.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-04-25T07:00:00Z
      DOI: 10.1142/S0217979222500588
       
  • A high precision time-multiplexed fully differential interface ASIC for
           capacitive MEMS accelerometer

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      Authors: Yuntao Liu, Shuo Fang, Ying Wang, Meijuan Ma, Yun Wang
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      A high precision time-multiplexed fully differential interface Application specific integrated circuit (ASIC) for micromechanical capacitive accelerometer is presented in this paper. A time-multiplexed fully differential capacitor-to-voltage (C-V) converter employs the half-bridge sensing structure and two paralleled single-end charge integrators to substitute the full-bridge or fully differential sensing element and restrain the influence of the common-mode voltage. A time-multiplexed fully differential switch-capacitor (SC) programmable gain amplifier (PGA) with continuous output is proposed, providing continuous signals to the following circuits. The proposed interface is fabricated in a 0.18 [math]m CMOS process, occupying an area of [math]. The measured results indicate that the total power dissipation is 8.25 mW from a 3.3 V power supply. The noise floor of the accelerometer is 10.5 [math]g/Hz[math], and the achieved figure of merit (FOM, 5.5 pW/Hz) is better than the previously reported works.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-04-25T07:00:00Z
      DOI: 10.1142/S021797922250062X
       
  • An overview of MEMS S&A device and its application in the
           micro-detonated system

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      Authors: Wenxing KAN, Enyi Chu, Ping Qu, Wei Ren, Tengjiang Hu, Wei Liu, Yulong Zhao
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      The integration of fuzes and initiators has been promoted by the development requirements of the miniaturized and intelligent ammunition, and the micro-detonated system integrated with S&A device is the key development direction. Initiators are considered the first component of the weapon system, and the safety and reliability of the initiators directly affect the safety and reliability of the weapon system. With the development of micro-electromechanical system (MEMS) initiators and the integration of fuze, in order to further improve the safety of the weapon system in the miniaturized and intelligent ammunition system, it is necessary to integrate the MEMS S&A device with the initiators, which is an important technical feature, to form a MEMS initiator with functional integration, high safety and reliability. MEMS S&A device is the key technology of the MEMS initiators’ devices with safety-isolation function. This paper summarizes the development of MEMS S&A devices in micro-fuzes and the micro-detonated systems in recent years. Combined with comparative analysis, it analyzes and summarizes the driving principles, application platforms, process technologies, structural material characteristics and other aspects, and proposes a suitable structure for the MEMS initiators integrated with S&A devices, which provides a reference for the research on the design of MEMS initiators with safety-isolation function.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-04-18T07:00:00Z
      DOI: 10.1142/S0217979222400781
       
  • Intricate and multiple chirped waves geometric structures solutions of
           two-mode KdV equation, spectral and stability analysis

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      Authors: H. I. Abdel-Gawad
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      In a fluid, when two modes are propagating simultaneously in the same direction with different velocities ([math] and [math]), they are regarded as first and second modes. The two-mode Korteweg de Vries equation (TMKdVE) has been currently studied in numerous works in the literature. However, the distinction between the two modes was not studied. Here, exact solutions of the TMKdVE are obtained by using the unified method. It is found that each solution depends either on [math] or on [math] These solutions are taken to assign to the first mode (FM) and the second mode (SM), respectively. These results are completely new. In this work, attention is focused on investigating the different chirped wave structures. It is shown that intricate, complex and multiple chirped waves in the two modes occur. Furthermore, it is shown that each mode can be seen in two visions: right wave (RW) and left wave (LW). The stability of steady-state solution is analyzed, where it is found that it is stable against varying the velocity [math]. While when varying the velocity [math], it is unstable when [math] and stable when [math]. The properties of the waves, the characteristic wavelength, frequency, traveling speed and spectrum content are shown graphically.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-04-18T07:00:00Z
      DOI: 10.1142/S0217979222500564
       
  • First-principles study of electronic structure and optical and mechanical
           properties of SiGeSn alloy

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      Authors: Xiaoying Zhang, Shumin Wen
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      The unique optical properties of SiGeSn alloy contribute to its remarkable potential in Si photonics applications. In this paper, the first-principles plane-wave super-soft pseudo-potential generalized gradient approximation [math] [math] method was used to investigate the 96-atom supercell structure of Si[math]Ge[math]Sn[math] ([math]) alloy. The lattice constants, electronic structure, mechanical properties and optical properties of the alloy were discussed. Results show that the lattice constant increases, the bandgap width decreases, resist external forces is weakened, and the bulk is easily deformed of Si[math]Ge[math]Sn[math] alloy with the increase in silicon-tin content. The dielectric function, refractive index, and photoconductivity of Si[math]Ge[math]Sn[math] alloy vary with the concentration of silicon and tin. The increase in silicon-tin concentration leads to an increase in infrared (IR) light absorption, resulting in a red shift. The effective mass of the electron decreases, the effective mass of the hole increases in the alloy, and the ratio [math] gradually increases, indicating that the carrier life is prolonged with the increase in Si and Sn concentrations.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-04-18T07:00:00Z
      DOI: 10.1142/S021797922250059X
       
  • Thermodynamic analysis of electroosmosis regulated peristaltic motion of
           [math]–[math] hybrid nanofluid

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      Authors: F. M. Abbasi, U. M. Zahid, Y. Akbar, Saba, M. B. B. Hamida
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      This study aims to investigate the thermodynamic analysis for electroosmotic flow of [math]–[math] hybrid nanofluid in the presence of peristaltic propulsion. Hybrid nanofluid is an aqueous solution of copper and iron oxide nanoparticles. Effects of electric field, Ohmic heating, magnetic field, viscous dissipation, heat sink/source and mixed convection are also considered. The Debye–Hückel and lubrication approach has been adopted to perform mathematical modeling. The resulting differential equations are numerically solved by employing the Shooting method. Analysis has been presented for irreversibility rate and heat transfer for the flow of hybrid nanoliquid. Results reveal that the addition of nanoparticles reduces the temperature and entropy generation of hybrid nanoliquid. Heat transfer rate enhances by improving Joule heating and electroosmotic parameters. An increase in Helmholtz–Smoluchowski velocity and Hartmann number decrease the velocity of fluid. Thermal performance of hybrid nanofluid ([math]–[math]) is more noticeable in comparison with conventional mono nanofluid ([math]–[math]) and base fluid ([math]).
      Citation: International Journal of Modern Physics B
      PubDate: 2022-04-18T07:00:00Z
      DOI: 10.1142/S0217979222500606
       
  • Dynamics of transient cages in a model 2D supercooled liquid

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      Authors: Gopika Krishnan, Upendra Harbola
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      Supercooled state of a liquid is characterized by extremely slow and spatially heterogeneous dynamics attributed to caging of particles by their neighbors. The dynamics of cages in a model 2D supercooled liquid is studied by analyzing single particle trajectories. The temperature dependence of cage times and cage sizes is discussed. The average cage time is found to show power-law divergence as the critical temperature is approached. A correlation between cage sizes and cage survival time is identified. At higher temperatures, bigger cages survive for longer. However, this behavior changes at low enough temperatures, where a crossover timescale is observed beyond which the smallest cages are more likely to survive. This crossover time originates mainly due to different initial dynamics of the bigger and the smaller cages, which shows strong temperature dependence for smaller cages.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-04-18T07:00:00Z
      DOI: 10.1142/S0217979222500655
       
  • Study on the bandgap and wave propagation characteristics of tetrachiral
           and star-shaped hybrid metamaterial

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      Authors: Ya-Jun Xin, Han Wang, Qian Ding, Qun Yan, Yong-Tao Sun, Shu-Liang Cheng, Liang Wang
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      In this paper, an innovative tetrachiral and star-shaped hybrid metamaterial (TSHM) composed of periodic assembly of single-phase lightweight materials is proposed. Based on the finite element method, the band structure of TSHM and the correlation between the bandgaps and geometric parameters are investigated. In addition, the visualization mode provided by the finite element software COMSOL Multiphysics 5.5 is used to explore the formation mechanism of the bandgaps. Furthermore, by drawing iso-frequency contours and group velocities, the directionality of elastic wave propagation in TSHM and the anisotropic behavior of metastructure are intuitively expressed. Finally, the wave regulation effect of the two-dimensional (2D) sandwich panel formed by the TSHM core is studied and the frequency response functions (FRFs) are plotted, which is another way to characterize the bandgap properties. Our research shows that the proposed periodic metamaterial has excellent wave attenuation performance in multiple frequency ranges, which will provide a valuable reference for vibration and noise reduction projects.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-04-18T07:00:00Z
      DOI: 10.1142/S0217979222500680
       
  • Experimental study of flat plate micro heat pipe with multi-layer
           structured wick

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      Authors: Zhengang Zhao, Yanhui Zhang, Xiaoda Ye, Fan Zhang
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      With the increased requirement of heat dissipation in the microelectronics field, the study of Flat plate Micro-Heat Pipe (FMHP) has become a hot topic. In this work, by analyzing the characteristics of the gas–liquid two-phase flow cycle within the FMHP, a Multi-Layer structured wick FMHP (MLHP) was prepared and used to improve the heat dissipation efficiency of microelectronic devices. The performance test system was set upto measure the heat transfer performance of the MLHP at different thermal powers and different liquid filling rates. The experimental results show that the MLHP of 150% filling rate can operate stably under 22 W thermal power, and it has an operating thermal resistance of 0.44[math]C/W. The liquid filling rate has a significant effect on the thermal performance of the MLHP. Around the suitable filling rate, the MLHP has sufficient working fluid inside and low resistance to vapor flow. Under the high thermal power, the advantages are more significant.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-04-18T07:00:00Z
      DOI: 10.1142/S0217979222500692
       
  • Modified AKNS model, Riccati-type pseudo-potential approach and infinite
           towers of quasi-conservation laws

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      Authors: H. Blas, M. Cerna Maguiña, L. F. dos Santos
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      In this paper, a dual Riccati-type pseudo-potential formulation is introduced for a modified AKNS system (MAKNS) and infinite towers of novel anomalous conservation laws are uncovered. In addition, infinite towers of exact nonlocal conservation laws are uncovered in a linear formulation of the system. It is shown that certain modifications of the nonlinear Schrödinger model (MNLS) can be obtained through a reduction process starting from the MAKNS model. So, the novel infinite sets of quasi-conservation laws and related anomalous charges are constructed by an unified and rigorous approach based on the Riccati-type pseudo-potential method, for the standard NLS and modified MNLS cases, respectively. The nonlocal properties, the complete list of towers of infinite number of anomalous charges and the (nonlocal) exact conservation laws of the quasi-integrable systems, such as the deformed Bullough–Dodd, Toda, KdV and SUSY sine-Gordon systems, can be studied in the framework presented in this paper. Our results may find many applications since the AKNS-type system arises in several branches of nonlinear physics such as Bose–Einstein condensation, superconductivity and soliton turbulence.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-04-18T07:00:00Z
      DOI: 10.1142/S0217979222500709
       
  • Multi-band simultaneous fits of transport data on [math]-type ScNiSb with
           including impurity conduction

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      Authors: Yasutomo Kajikawa
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      The experimental data of the electrical conductivity [math] and the Seebeck coefficient [math] in the temperature range from 2 K to 950 K, together with those of the Hall coefficient [math] in the temperature range from 2 K to 300 K, on the polycrystalline sample of [math]-type ScNiSb reported by Ciesielski et al. [Phys. Rev. Appl. 14, 054046 (2020)] have been critically analyzed with including both nearest-neighbor and Mott variable-range hopping (VRH) conduction. Through the simultaneous fits to the experimental data of [math], [math] and [math], various transport parameters such as the bandgap energy, the effective masses of holes and electrons, and the electron-to-hole mobility ratio, are deduced together with the ionization energy and the concentration of the acceptor level. It is shown that nearest-neighbor hopping (NNH) conduction exhibits a significant effect on the Seebeck coefficient at low temperatures while VRH conduction has an only small effect on it. Contrary to the speculation by Ciesielski et al., the electron mobility is proved to be lower than the hole mobility.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-04-18T07:00:00Z
      DOI: 10.1142/S0217979222500710
       
  • Three-state quantum walks on cycles

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      Authors: Qi Han, Ning Bai, Yaxin Kou, Huan Wang
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      In this paper, on the basis of constructing a new shift operator [math] and choosing the Grover coin [math] as coin operator [math], we get the standard evolution operator [math] on cycles. Using [math], we not only got the analytical expression of wavefunction [math], but also obtained the conclusion that the limit distribution [math] of [math], which is not uniform distribution, regardless of [math] is odd or even.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-04-18T07:00:00Z
      DOI: 10.1142/S0217979222500758
       
  • Intensifying bismuth concentration in tin chalcogenide for solar cell
           applications

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      Authors: M. Muthumari, M. Manjula, K. Pradheepa, Pandiyarasan Veluswamy
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      Solar cells convert electricity from the solar spectrum to more than 60%. Researchers focused on this promising field because of the most demanding renewable source of electrical energy. Based on the demand, we focused our study on bismuth-doped tin chalcogenide materials for the optoelectronic and solar cell applications. The effect of bismuth concentration on structural, electronic, thermodynamic and optical properties of Sn[math]Bi[math]Te and Sn[math]Bi[math]Te materials is studied based on density functional theory (DFT). Generalized gradient approximation (GGA) was proposed to calculate structural parameters, density of states and band structure. Here the lattice parameter increases when increasing bismuth concentration. The parent binary SnTe is in semiconducting behavior with a narrow direct bandgap of 0.234 eV (L-L). From the calculated thermal and optical results, the Gruneisen parameter is maximum for Sn[math]Bi[math]Te and Debye temperature is maximum for Sn[math]Bi[math]Te. The studied materials are consistent in IR, visible and UV regions and they are adorable for IR optical detectors and solar cell applications.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-04-18T07:00:00Z
      DOI: 10.1142/S0217979222500771
       
  • Phonon-assisted phase separation in strongly correlated systems

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      Authors: A. Sherman
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      We relate the phase separation observed in many crystals with pronounced electron correlations to the regions of negative electron compressibility (NEC). They were found in several models describing strong electron correlations. At low temperatures, these regions arise near chemical potentials corresponding to the change of the ground state in the site Hamiltonian. The NEC leads to the separation of the system into electron-rich and electron-poor domains. The energy released in the course of this separation is absorbed by phonons. Another role of phonons is to give a definite form — stripes or checkerboards — to lattice distortions and domains of different electron concentrations. The shape, direction and periodicity of such textures are determined by wavevectors of lattice distortions, which most strongly scatter electrons.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-04-18T07:00:00Z
      DOI: 10.1142/S0217979222500813
       
  • Optical modes in the perovskite CsPbX3 semicircular and circular
           microcavity

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      Authors: Jian Xu, Jun Dai
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      In this paper, we used the finite element method to numerically study the possible optical resonance modes in the all-inorganic metal halide perovskite (CsPbX3, [math], Br, I) semicircular and circular microcavities. For the semicircular microcavity, the quasi-three-period mode has the highest quality factor among quasi-whispering gallery mode (WGM), two-period mode and four-period mode. The quality factors of the four resonance modes all increase linearly for the larger cavity size. In addition, the circular perovskite microcavities present the WGM patterns with extremely high-quality factors, which indicates that the circular perovskite microcavity has the potential application in the optical microcavity or laser device.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-04-05T07:00:00Z
      DOI: 10.1142/S0217979222400227
       
  • Hopping conduction in FeSi II. deconvolution analyses of
           temperature-dependent conductivity and its reduced activation energy

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      Authors: Yasutomo Kajikawa
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      The deconvolution analysis of the temperature dependence of the reduced activation energy of the conductivity has been utilized for identifying the hopping conduction mechanism in FeSi samples. It is shown that the hopping conduction in the top impurity Hubbard band, i.e., so-called [math] conduction, significantly contributes to the conductivity around 50 K. It is also shown that the increase in the effective concentration of the hopping carriers in the bottom Hubbard band causes a step-like increase of the variable range hopping conductivity with increasing temperature for the FeSi sample when the compensation ratio is less than 0.2.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-04-02T07:00:00Z
      DOI: 10.1142/S0217979222500540
       
  • Determination of the concentration of prepared Rehmannia root solution by
           fluorescence polarization spectroscopy combined with the least-square
           method

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      Authors: Xiao-Lin Li, Yun-Ling Sun, Hai-Ying Ma, Jie Wang, Hang Yang, Chun Zhu
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      In recent years, the safety of traditional Chinese medicine has gradually attracted consumers’ attention. Therefore, the qualitative and quantitative detection of traditional Chinese medicine has become a hot research topic in recent years. In this paper, we chose prepared Rehmannia root as the research object. By using the fluorescence polarization spectrum and the least-square method, a method for predicting the concentration of traditional Chinese medicine solutions was established. First, we scanned the fluorescence polarization spectra of the prepared Rehmannia root solution to obtain the inner anisotropy and anisotropy of each sample. Then, the least-square method was used to obtain the functional relationship between concentration and anisotropy. Finally, the functional relation was applied to predict the concentration of the prepared Rehmannia root solution. The correlation coefficients of the predicted concentration were 0.9944 and 0.9928, with an average recovery rate of 100.94% and 99.58%, respectively. The results show that fluorescence polarization spectroscopy combined with the least-squares method can quickly and accurately detect the concentration of Rehmannia glutinosa root solution. This provides a new method for the content detection of traditional Chinese medicine components.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-03-29T07:00:00Z
      DOI: 10.1142/S0217979222400203
       
  • Optimize classification testing of apple juice combining derivative
           fluorescence spectroscopy with PCA

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      Authors: Chun Zhu, Xin-Shu Song, Huai-Bo Liu, Guo-Qing Chen, Tuo Zhu
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      Cluster analysis of apple juice is an important method in the quality identification of fruit juice. However, the traditional principal component analysis (PCA) is to reduce the dimension of high dimensional data and to achieve clustering by way of score value. Experiments have found that this clustering method is not suitable for real samples with fluorescence overlap. In this paper, we propose a processing mechanism to optimize the derivative of the fluorescence spectrum. When the derivative is calculated, we can amplify the spectral difference of the similar matter and improve the ability of the PCA to achieve the best effect of clustering. Experiments show that the optimized method for the actual sample classification accuracy rate of 100%, which can fully realize the type of commercially available apple juice beverage distinction and achieve the practical application of quality testing.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-03-29T07:00:00Z
      DOI: 10.1142/S0217979222400215
       
  • Effect of AlxCoCrFeNiCu binder on mechanical properties and wear
           performance of Ti(C, N) cermet

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      Authors: Zihao Wu, Yuhong Chen, Wanxiu Hai, Meiling Liu
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      In this study, the effects of Al[math]CoCrFeNiCu high entropy alloy (HEA) binder on the phase composition, microstructure, hardness, fracture toughness and abrasion resistance of Ti(C, N) cermets prepared by powder metallurgy method were investigated by X-ray diffraction, scanning electron microscopy, mechanical properties and abrasion test. The results showed that the sintered Ti(C, N) cermets exhibit homogeneous core-shell microstructure at 1500[math]C when HEAs with 0.2 at% aluminum were added. The Vickers hardness and fracture toughness of cermet with Al[math]CoCrFeNiCu could reach the peak value of 2235 Kg/mm2 and 10.51 MPa[math]m[math] and the fracture morphology showed mixture fracture. The Ti(C, N) cermets with HEA binder exhibited good friction and wear properties.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-03-29T07:00:00Z
      DOI: 10.1142/S0217979222400380
       
  • Fabrication and characterization of Ni–Fe–P–TiO2
           nanocomposite coatings

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      Authors: Dongdong Zhang, Pan Zhang, Jiahuan Chen, Zhen He, Mingfang Wu
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      This study develops the Ni–Fe–P–TiO2 nanocomposite coatings via an electroless deposition process. X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used to determine the coating structures. Hardness and wear tests were conducted to measure the coating’s mechanical performance, and polarization curves were recorded to evaluate the corrosion behavior. The results show that the TiO2 nanoparticles are incorporated into the coatings. The proper addition of TiO2 refines the coating surface morphology without changing the coating phase constituents. The best mechanical and corrosion performance is obtained for the 0.5-g/L modified Ni–Fe–P–TiO2 sample, owing to its compact surface feature and well-dispersed TiO2 nanoparticles.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-03-29T07:00:00Z
      DOI: 10.1142/S0217979222400495
       
  • Sol-enhanced electroplating of nickel–ferrum–phosphorus–titanium
           oxide coatings: Structures, compositions, and performance

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      Authors: Jiahuan Chen, Zhang Pan, Songtao Jiang, Yuxin Wang, Wei Liu
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      In this paper, the Ni–Fe–P–TiO2 coatings with different TiO2 sol addition have been prepared by a sol-enhanced electroplating process. The microstructures and elemental compositions of prepared coatings were systematically characterized. The coating performance including mechanical properties and corrosion resistance were investigated. The results show that the proper addition of 10 mL/L TiO2 sol slightly refines the surface morphology, while a much higher 50 mL/L TiO2 sol addition causes a relatively nonuniform surface. The much-improved mechanical and corrosion performance is achieved by adding 10 mL/L TiO2 sol, due to the strengthening effect by the well-dispersed nanoparticles and the compact, uniform surface structure. The wear tests confirm that abrasive wear dominates in the sample modified by 10 mL/L TiO2 sol, while adhesion is the primary type for other samples.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-03-29T07:00:00Z
      DOI: 10.1142/S0217979222400720
       
  • A study on the sol-enhanced electrodeposition of Ni–P–TiO2
           nanocomposite coatings

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      Authors: Zhen He, Luyuan Chen, Haitao Cui, Yunfei Song, Weihui Zhang
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      Ni–P–TiO2 composite coatings were deposited on brass substrates using a sol-enhanced electrodeposition method. The cyclic voltammetry tests were used to study the effect of TiO2 sol on Ni–P deposition. The surface morphologies of Ni–P–TiO2 deposits were observed, and their elemental analysis was also conducted. The systematic tests were performed to characterize the mechanical and corrosion behavior of as-prepared coatings. The voltammetric studies showed that the addition of TiO2 sol at 12.5 mL/L slightly promoted the Ni–P electrodeposition, while the excessive addition at 50 mL/L reduced it. The results showed that the in-situ generated TiO2 nanoparticles ([math]15 nm diameter) could be highly dispersed in the electrolytic bath. The addition of TiO2 sol at 12.5 mL/L slightly promoted the Ni–P electrodeposition, while the excessive addition at 50 mL/L caused the opposite.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-03-29T07:00:00Z
      DOI: 10.1142/S0217979222400744
       
  • Research on vibration energy collector of T-shaped piezoelectric beam

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      Authors: Xin Chen, Jie Cui, Shenghui Tao, Dongqing Miao
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      In this paper, in order to obtain a larger amplitude–frequency width, a T-shaped vibration energy harvester device with 1:2 internal resonance buckling was investigated and designed in a parametric study way, whose natural frequency can be adjusted by changing the geometric parameters and buckling load exerted on the T-shaped piezoelectric beam. The effects of different model lengths and widths on the output voltage of the energy harvester were studied systematically. By comparing the difference between the variation trend of displacement value and output voltage value of harvester model, it can be concluded that internal resonance can broaden the frequency band of vibration energy collection of buckling T-shaped piezoelectric beam. Additionally, when the internal resonance ratio is 1:2, the amplitude width and voltage output value can be effectively increased. The results show that when the buckling T-shaped piezoelectric beam resonates at a ratio of 1:2, the vibration energy collection frequency band of the buckling T-shaped piezoelectric beam can also be broadened.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-03-29T07:00:00Z
      DOI: 10.1142/S0217979222400756
       
  • Microstructure and corrosion performance of Zr–1Nb alloy laser welded
           joints treated by micro-arc oxidation

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      Authors: Ruilin Liu, Qiang Zhou, Zheng Lei, Hui Chen, Zongtao Zhu, Yuanxing Li
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      The protective coatings on laser-welded joints of Zr–1Nb alloy were prepared by the micro-arc oxidation (MAO) process. The morphology, microstructure and phase composition of MAO coatings at different regions of Zr–1Nb alloy laser-welded joints were investigated by scanning electron microscopy (SEM) and X-ray diffraction (XRD). Potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) were used to evaluate the corrosion behaviors of the coatings. The MAO coatings at the fusion zone (FZ) and heat-affected zone (HAZ) were smooth with some small holes, while MAO coatings at base metal (BM) were relatively rough with large holes. The cross-sectional topography at FZ coatings was quite dense with less distribution of pores and cracks, which can effectively improve the protective properties of the coatings. HAZ coatings were divided into outer loose layer and inner dense layer. The BM coating layer possessing many holes was a typical sparse layer structure. The phase compositions of welded joints treated by MAO were diverse at different zones of the joints, but all of them consisted of the monoclinic ZrO2 and tetragonal ZrO2 phases. The coatings of FZ had the best corrosion resistance, compared with HAZ and BM. The results of EIS indicated that the thickness and defects of the inner compact layer played a key role in improving the corrosion resistance of the MAO coatings on the surface of the Zr–1Nb alloy laser-welded joints.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-03-19T07:00:00Z
      DOI: 10.1142/S0217979222400161
       
  • Effect of inorganic ions on the microstructure and visible-light-driven
           photocatalysis of WO3 nanostructures

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      Authors: Yangsi Liu, Xiaoli Xi, Mengmeng Li
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      Tungsten trioxide (WO[math] nanostructures were synthesized by a simple hydrothermal method. The morphology of WO3 nanostructures can be varied by adding inorganic ions from alkali metal salts. The effect of inorganic ions on the microstructure and visible-light-driven photocatalytic activity was characterized via X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and UV-vis spectroscopy. Methylene blue (MB) photodegradation experiments showed that the one-dimensional (1D) WO3 nanorods prepared by the aid of potassium sulfate exhibited the highest photocatalytic efficiency (96.4% in 2.5 h) under visible light irradiation. It is deduced that the excellent photocatalytic property of 1D WO3 nanorods was mainly attributed to the efficient charge transfer capability, which is promising for practical applications in environmental remediation.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-03-19T07:00:00Z
      DOI: 10.1142/S0217979222400197
       
  • Effects of annealing atmosphere on microstructure and photoelectric
           properties of titanium-doped ZnO nanofilms

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      Authors: Zhenying Chen, Wen Deng
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      In this research, four titanium-doped zinc oxide (TZO) thin films were deposited on quartz glass substrates by radio frequency (RF) magnetron sputtering. Three of the samples were annealed at [math]C for 40 mins in N2, Ar and vacuum, respectively. The microstructure and photoelectric properties of the films were characterized. The results showed that annealing in different atmospheres has a significant effect on the microstructure and photoelectric properties. The structure of all the annealed films remained polycrystalline, with a [math]-axis preferred orientation, and the crystallization quality was improved. In addition, the photoelectric properties were also significantly improved by annealing with the average transmittance in the visible region exceeding 90%, the resistivity reaching [math]. The conductivity enhancement was mainly attributed to the increased mobility of carriers. Annealing in argon had the best effect. Finally, the resistivity of all the samples experienced an initial negligible change followed by an increase as the temperature was raised from 10 to 350 K.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-03-19T07:00:00Z
      DOI: 10.1142/S0217979222400392
       
  • Arc behavior and deposition characteristics of assisted wire filling
           cable-type welding wire GMAW

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      Authors: Zhidong Yang, Yuntao Chen, Yongshun Zhang, Chenfu Fang, Shujin Chen, Xiaoyan Gu
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      The assisted wire filling (AWF) cable-type welding wire (CWW) gas metal arc welding (GMAW) is an innovative welding process in which the wire of CWW GMAW is used as the electrode, and the assisted wire using the arc and molten pool melt. The electrode and assisted wire are with CWW, composed of seven wires, one in the center and others uniformly distributed around it. This paper compares the weld seam appearance, arc shape, arc behavior, electrical parameters, and deposition characteristics of the AWF CWW GMAW and CWW GMAW. The arc shape and electrical parameters of AWF CWW GMAW are similar to the CWW GMAW, in which the welding process was not disturbed by the assisted wire. The AWF CWW GMAW welding wire melting and metal deposition rates are higher than those for CWW GMAW with the same welding parameters. The regular changes of weld width, weld depth, and reinforcement that increased with the increase of welding current are the same as those of the welding seam from CWW GMAW. The AWF CWW GMAW weld depth decreased, and the reinforcement is increased compared with the CWW GMAW under the same current. The tension test of the AWF CWW GMAW button joint meets the requirements of CCS.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-03-19T07:00:00Z
      DOI: 10.1142/S0217979222400410
       
  • Investigation on electron beam welding of dissimilar wrought/selective
           laser melting AISI 304 stainless steel plates

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      Authors: Kai Qi, Tao Chang, Zhongxing Shi, Jiayang Gu, Taotao Li, Ruifeng Li
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      The selective laser melting (SLM) process gives a possibility to create complex shape parts. Joining SLM alloy parts to similar or dissimilar alloy parts can overcome some product design limitations such as limited dimensions and residual stress concentration. In this study, successful electron beam joining work on to SLM AISI 304 stainless steel plates was performed. The influence of beam current on the weld bead profile was investigated. Typical welded joints were analyzed by microstructure, microhardness, and tensile tests. The optimal welding parameters were obtained accordingly. A thorough analysis of the element and microstructure distribution in SLM and its influence on the properties of the welded joints were also investigated.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-03-19T07:00:00Z
      DOI: 10.1142/S0217979222400458
       
  • Effect of ultrasonic vibration and heat pipe assistance on microstructure
           and mechanical properties of friction stir-welded AZ31 alloy

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      Authors: Qianhao Zang, Jingmin Yu, Jinhua Peng, Liangyu Chen, Zexin Wang, Sheng Lu
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      This work aims to discover the effects of ultrasonic vibration and heat pipe assistance during the friction stir welding (FSW) of AZ31 magnesium alloy. The microstructure and mechanical properties of FSWed AZ31 alloy were investigated. The ultrasonic vibration and heat pipe assistance can promote the dynamic recrystallization of AZ31 magnesium alloy during the FSW process, which reduces the inhomogeneous microstructure and the grains and weakens the texture intensity of the FSWed AZ31 alloy. The microstructure and texture of the joint are regulated by the ultrasonic vibration and heat pipe assistance, to enhance the tensile strength, elongation and microhardness.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-03-19T07:00:00Z
      DOI: 10.1142/S0217979222400483
       
  • Effect of heat treatment on corrosion resistance of supersonic atmospheric
           plasma-sprayed Cr3C2–NiCr coating

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      Authors: Kai Chong, Xiubing Liang, Zhibin Zhang, Yong Zou
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      Supersonic atmospheric plasma spraying (SAPS) is a newly developed technique in preparing high-performance Cr3C2–NiCr coatings with a high deposition efficiency. In this work, the effect of post-heat treatment on carbide precipitation and corrosion property of the SAPS Cr3C2–NiCr coatings was investigated. The results suggested that heat treatment induced the precipitation of secondary carbide grains, and the size of these carbides increased with the increasing heat treatment temperature. In addition, the self-corrosion current density of the coatings thermally treated at [math]C was seven times smaller than that of the coating without heat treatment. The corrosion morphology showed that significant corrosion cracks were present on the as-sprayed coating. In contrast, the heat-treated coatings demonstrated small corrosion holes due to the formation of small corrosion galvanic cells between the precipitation of carbides and the substrate.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-03-19T07:00:00Z
      DOI: 10.1142/S0217979222400525
       
  • Joining of C–C composite with BNi-1a

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      Authors: Liang Wu, Rong Zhu, Meng Gao, Zhongqi Hu, Yifeng Xiao, Qiankun Zhang, Chun Li
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      In this study, Carbon–Carbon (C–C) composite joints were prepared using BNi-1a paste filler metal as the intermediate layer in a vacuum brazing method. The interfacial structures and compositions of the joints were analyzed using scanning electron microscopy (SEM), energy dispersive spectrometry (EDS) and X-ray diffraction (XRD). The results show that element interdiffusion and chemical reactions occurred in the joining zone, and various compounds were formed, including Cr3C2, Ni[math]Si[math], Ni(s.s), MB and MC ([math], Fe, Ni). The optimum joining parameters were determined to be the brazing at the temperature of 1120[math]C for 60 min, which produced the joint with the maximum shear strength of 24.13 MPa. The joint shear strength and fracture morphology demonstrate that bonding temperature and retention time have a significant effect on the strength of C–C composites.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-03-19T07:00:00Z
      DOI: 10.1142/S0217979222400604
       
  • The cell responses on Sr-incorporated Na–Ti–O nano-network on
           titanium surface

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      Authors: Yanlian Liu, Li Zhang, Ruiqiang Hang, Taotao Li, Chengzhi Liu
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      A Sr-incorporated Na–Ti–O nano-network with a lateral pore size of 20–300 nm was developed on titanium (Ti) substrate using one-step alkali etching in a mixed solution of NaOH and Sr(OH)2. The pore size of coating increases with Sr content, implying the proper amount of Sr in the electrolyte accelerates nanowire aggregation. The Sr(OH)2 particle precipitation has no significant effect on the coating morphology. Moreover, biological experiments suggest the prepared coating exhibits good cytocompatibility, and the amount of Sr under 0.7 at.% has no noticeable promoting effect on the cytocompatibility.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-03-19T07:00:00Z
      DOI: 10.1142/S0217979222400653
       
  • Effects of cyclic closed-die forging on the microstructural evolution and
           mechanical properties of SiC/AZ91D nanocomposites

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      Authors: Li Zhang, Ruxin Ren, Jie Ren, Yanlian Liu, Wenjun Liao, Taotao Li, Chengzhi Liu, Qudong Wang
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      A two-step cyclic closed-die forging (CCDF), with the first step to enhance the formability and the second step to refine the matrix grain, was implemented on a solution-treated SiC/AZ91D nanocomposites. Results show that the initial coarse grain is refined from [math]m to [math]m after the implementation of CCDF at [math]C, and further refined to [math]m after another 6-pass of CCDF at [math]C. Mg[math]Al[math] precipitates are gradually crushed with the progress of CCDF and eventually evolve into small particles uniformly distributed within the matrix. SiC clusters are effectively dispersed into smaller clusters or single particle. Yield stress (YS) and ultimate tensile strength (UTS) of the SiC/AZ91D nanocomposites increase after 1 pass of CCDF at [math]C, while the elongation to fracture decreases. With the progress of CCDF, YS, UTS and elongation to fracture exhibit a continual increase, reaching their maximum values of 196 MPa, 371 MPa and 9.2% after 6 passes of CCDF.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-03-19T07:00:00Z
      DOI: 10.1142/S0217979222400665
       
  • Improvement of laser-induced damage thresholds of aluminum by using a
           unique electropolishing method

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      Authors: Caizhen Yao, Yuan Yuan, Yilan Jiang, Zhenhua Fang, Longfei Niu, Yang Gan
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      Surfaces of polycrystalline Al samples were treated by using electropolishing, etching or mechanical polishing methods. Surface morphologies, laser-induced damage thresholds (LIDTs) and ejected particle numbers of different samples were analyzed and compared. Results showed that several different surface morphologies of Al were prepared. A new surface electropolishing technique was developed and an improvement of 95% of LIDT of Al was obtained by using this method. Ejected particle numbers of different samples were monitored and compared to investigate their damage-resistant properties. The particle numbers ejected from the electropolished sample are much smaller than those of etched or mechanically polished samples under Q-switched 355-nm Nd:YAG laser irradiation at 6.8 ns pulses.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-03-19T07:00:00Z
      DOI: 10.1142/S0217979222400677
       
  • Damage behaviors of silica microparticles on fused silica optics under
           355 nm high fluence laser

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      Authors: Yuhan Li, Xinxiang Miao, Zhenhua Fang, Guorui Zhou, Longfei Niu, Ke Yang, Hairong Wang, Caizhen Yao, Xiaodong Jiang
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      Particulate contaminants are common damage precursors on optics in the daily operation of high laser power systems. In this paper, the damage behaviors of silica particles attached to the front and back surfaces of fused silica optics under the irradiation of a 355 nm laser were studied. Results showed that silica particles on the front surface tend to splash severely under high fluence, while the particle on the back surface forms a large laser-induced shallow pit (LSP)-like pit on the substrate. Different damage morphologies were observed, and damage mechanisms were also proposed.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-03-19T07:00:00Z
      DOI: 10.1142/S0217979222400689
       
  • Influence of reaction temperature on phase assemblage and morphologies of
           SiC nanowires by a carbothermal reduction method

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      Authors: Yu Ding, Kai Zhao, Haitao Cui, Zhen He, Li Yin
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      3C-SiC nanowires were synthesized using Si, SiO2, and active carbon as raw materials at different reaction temperatures without additional metal catalysts. The influence of reaction temperature on the phase assemblage and morphologies of the products were investigated by XRD and SEM. The experimental results indicate that a suitable reaction temperature is essential for the final products. When the reaction temperature was not high enough (1400 and 1450[math]C), the raw materials were not reacted completely, and a small amount of targeted nanowires were formed. When reaction temperature increased to 1500[math]C, the nanowires were mainly composed of 3C-SiC phase, and they were straight, curved, and needle-shaped. The straight nanowires ranged from several to tens of microns, but the diameters were not uniform. The vapor-solid mechanism dominantly governed the formation of SiC nanowires.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-03-19T07:00:00Z
      DOI: 10.1142/S0217979222400732
       
  • Microstructure evolution and mechanical properties of copper/304
           stainless-steel joints by low-temperature soldering

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      Authors: Shuyi Yao, Xin Shi, Yuanxing Li, Liping Wan, Xiangbo Zheng, Yao Wang, Hui Chen
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      Pure copper (Cu) soldering joints with 304 stainless steel (SS) at different soldering temperatures (240–[math]C) were prepared by using Sn–3.5 Ag (wt.%) as a soldering filler-metal material. The mechanical properties and microstructure evolution were investigated. Sound Cu/304 SS joints were obtained by soldering at 240–[math]C for 90 s and the highest average joint shear strength was [math] MPa when brazed at [math]C. The Cu6Sn5 and Ag3Sn phases were typical intermetallic compounds (IMCs) in the joints at a soldering temperature of [math]C. Cu3Sn IMCs were formed at the Cu/Cu6Sn5 interface as the soldering temperature increased to [math]C and above. Shear fracture analysis by scanning electron microscopy (SEM) with energy dispersive spectroscopy showed that the joints fractured mostly inside the Cu6Sn5 layers.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-03-11T08:00:00Z
      DOI: 10.1142/S021797922240015X
       
  • Dilution rate and wear-resistance performance of assisted wire filling
           cable-type welding wire GMAW of surfacing layer

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      Authors: Zhidong Yang, Yuntao Chen, Dongdong Yang, Chenfu Fang, Shujin Chen, Mingxiao Shi
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      Surfacing technology is widely used in material surface modification and repair industries, with the advantages of low dilution rate and high wear-resistance performance. The assisted wire filling (AWF) of cable-type welding wire (CWW) gas metal arc welding (GMAW) is an innovative surfacing method, using CWW as the consumable electrode. The dilution rate and wear-resistance performance were studied in this paper. The results show that the weld penetration of the AWF-CWW-GMAW surfacing layer increased with the increase of welding current, which was consistent with the method of CWW GMAW. The dilution rate of the surfacing layer was about 19% lower than that of the CWW-GMAW with the same parameters. Comparing with the CWW-GAMW method, the sample treated by AFW-CWW-GAMW had a smaller dilution rate of surfacing layer, a less wear loss, a smaller friction coefficient and a higher hardness under the same welding parameters. The alloy element distribution of the surfacing layer was higher than that of CWW-GMAW from the weld to the base metal.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-03-11T08:00:00Z
      DOI: 10.1142/S0217979222400422
       
  • Experimental study on the effect of dwell-fatigue life of titanium alloy
           for pressure hull

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      Authors: Yong-Zheng Li, Shi-Xin Zhang, Ke Wang
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      Titanium alloy is widely applied in the pressure hull of the manned submersible for its good mechanical properties. The operations of the manned submersible include diving, cruising and ascent. The load spectrum of the pressure hull is a typical dwell-fatigue process. The dwell effect is known to induce a reduction in the fatigue life of titanium alloys at room-temperature. The dwell fatigue of the new titanium alloy is the key issue to ensure a safe submersible operation. In this paper, the dwell-fatigue behavior of a new titanium alloy for pressure hull is investigated. It is found that the accumulated strain at the final rupture increases with the increase of dwell time, and the total cycle decreases. The total cycle life of the specimen decreases, and the accumulated strain increases with increasing peak stress level. The introduction of the dwell time at the peak stress will significantly reduce the dwell-fatigue life and the mechanism is due to the accumulation of the plastic strain.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-03-11T08:00:00Z
      DOI: 10.1142/S0217979222400471
       
  • Effect of arc voltage on process stability of bypass-coupling twin-wire
           indirect arc welding

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      Authors: Dongting Wu, Zhibin Zhang, Fuxin Du, Yong Zou
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      With the development of bypass-coupling technique, the process window of twin-wire indirect arc welding has been effectively broadened, but the process stability is required to be further improved. In this paper, the influence of arc voltage on the stability of welding process was investigated through process experiments. It was found that the direct arc and indirect arc were alternately ignited. Under the condition of the output voltage at 32 V, the ratio of the indirect arc current to overall welding current was the largest. The weld was well formed with the output voltage above 32 V. Considering both the deposition efficiency and process stability, the desirable output voltage was 32 V.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-03-11T08:00:00Z
      DOI: 10.1142/S0217979222400537
       
  • Influence of working pressure on the structure and magnetic properties of
           polycrystalline iron films

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      Authors: C. X. Zhou, Y. Yu, X. S. Wei, B. Yan
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      In this work, we aimed to evaluate the influence of working pressure on the structure and magnetic properties of the iron film. Iron films were deposited on Si (100) substrates by direct current (DC) magnetron sputtering at different working pressures. The X-ray diffraction (XRD) results indicated that all iron films were polycrystalline BCC structures with the obvious (110) orientation. When the working pressure increased, the (110) peak became weaker and wider, indicating that the crystallinity and the particle size decreased. Particle size gradually decreased, easily seen from the surface morphology. The (100) peak shifted toward the smaller angle with the increase of working pressure, displaying the production of compressive strain. The increase of the working pressure raised the density of defects, which was the origin of the strain. It was the main reason that the Hc dramatically increased. The atomic force microscope (AFM) results exhibited that low working pressure was conducive to obtaining uniform and smooth surface morphology. This is why the iron film at low working pressure can achieve better magnetic properties. The iron film deposited at 0.6 Pa had the largest saturation magnetization (Ms) and squareness ratio (Mr/Ms), the smallest coercivity (Hc), reaching 1573 emu/cm3, 0.86, 102 Oe, respectively.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-03-11T08:00:00Z
      DOI: 10.1142/S0217979222400574
       
  • The compression behavior of two different simulation models for the
           closed-cell Al foam-filled tube established by Digimat and ABAQUS

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      Authors: Dayong Shen, Gengqiang Huang, Le Tong, Zhigang Xu
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      In this work, two types of models for a closed-cell Al foam with 80% porosity were established by Digimat and ABAQUS. The compression characteristics of the Al foam-filled stainless steel tube structure with both Al foam models were simulated and compared in combination with experiments. The results showed that Al foam-filled tubes presented higher peak compressive force compared with unfilled stainless steel tube. Compared with the crushable Al Foam model established by ABAQUS, the Digimat model could intuitively observe the plastic deformation in the cells of the Al foam-filled structure. However, the simulated results derived from Digimat software were slightly different from the experimental result. In general, the crushable-foam model embedded in ABAQUS can better match the experimental results from a macro perspective.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-03-11T08:00:00Z
      DOI: 10.1142/S0217979222400598
       
  • Investigation of PTCR characteristics in Sm2O3-doped BaTiO3-based
           chip-type ceramics prepared in a reducing atmosphere

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      Authors: Xuxin Cheng, Zhiyong Xu, Xiaoming Chen, Bingwen Yang, Yuxin Wang, Mingzhao Dang
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      In this paper, we investigated the influence of cooling rates on electrical properties and positive temperature coefficient of resistance (PTCR) effect of (Ba[math]Sm[math]TiO[math] mol SiO2 (BTS) ceramics, which were fired at [math]C for 30 min in a reducing atmosphere and then reoxidized at 700–[math]C for 1 h. The results showed that the room-temperature (RT) resistivity and the resistance jump of the chip-type BTS ceramics increased with an increase in the cooling rate. Furthermore, the RT resistivity of the BTS specimens gradually decreased at first and then increased with increasing donor-doping concentration. In addition, the influence of cooling rates on the microstructure of ceramics was also investigated.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-03-11T08:00:00Z
      DOI: 10.1142/S0217979222400628
       
  • Structure and morphology of graphite nanoparticles treated by fiber laser
           irradiation

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      Authors: Fang Luo, Rongjie Jiang, Weibin Wang, Yuanhang Lu, Yizhou Shen
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      The graphite nanoparticles (GNPs) were prepared on the surface of monocrystalline Si by laser irradiation under different laser energy densities (3.3–8.33 kJ/cm[math]. The effects of laser energy density on structure and surface morphology were systematically investigated. The results show that the morphology of GNPs remained polycrystalline structure under laser irradiation with an energy density of 2.22 kJ/cm2. When the laser energy density was 2.78 kJ/cm2, the GNPs can induce the preset GNPs to transform into amorphous graphite nanofibers. The GNPs under the laser density of 3.33 kJ/cm2 showed a more amorphous structure. With the further increase of the laser energy density to 5.55 kJ/cm2, the main phase composition turned to SiC and Si.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-03-11T08:00:00Z
      DOI: 10.1142/S021797922240063X
       
  • Influence of base level of the roll flower pattern on the roll forming
           quality of the hat-shaped section

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      Authors: Lanfang Jiang, Xiaohui Tao, Yaochen Lin, Zili Wang, Shuyou Zhang, Heng Li, Yi He
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      High-strength galvanized steel has the advantages of high strength, lightweight and high reliability. However, there are many defects in the forming process, especially the springback, which seriously affects the forming quality. To improve the forming quality of high-strength galvanized steel in rolling forming, a three-dimensional finite element analysis model of a hat-shaped section roll forming process was built by software ABAQUS. The hat-shaped section with a single-layer flange was simulated with three different base-level roll forming methods. The base-level roll forming method was used to simulate and experiment the hat-shaped section with double-layer flanges. This paper provided a method to precisely control the springback angle of high-strength galvanized steel and improved its forming quality.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-03-11T08:00:00Z
      DOI: 10.1142/S0217979222400641
       
  • The hierarchical surface on AZ31 magnesium alloy: Preparation, properties,
           and performance

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      Authors: Songlin Zheng, Yifan Yang, Jinyi Tan, Luyuan Chen, Yuxin Wang, Zhen He
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      In this paper, hierarchical surface structures were developed to achieve the superhydrophobicity on AZ31 magnesium alloys. The uniform nodular microstructure was constructed by laser processing, and the subsequent cobalt electrodeposition fabricated a nanostructured needle-like morphology onto the surface nodules. The superhydrophobic surfaces prepared under varied electrodeposition current densities were characterized. When applying 7 mA/cm2 current density, the sample revealed the best superhydrophobic performance. The chemical stability of superhydrophobic samples was tested, which confirmed excellent superhydrophobicity was hardly affected by the corrosion environment. The results showed the samples still possessed the hydrophobic ability after tests. The developed fabrication method combines the advantages of laser processing and electrodeposition, which serves as a fast and cost-effective pathway to manufacture superhydrophobic surfaces.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-03-11T08:00:00Z
      DOI: 10.1142/S0217979222400768
       
  • Dynamic performance of flax fiber-reinforced polymer

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      Authors: Zonglai Mo, Wenjie Wang, Nawawi Chouw, Krishnan Jayaraman
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      The study addresses the dynamic performance of flax fiber-reinforced polymer (FFRP) composites via a series of drop-weight impact tests. The experiment was performed based on ASTM standards by using an instrumented falling weight impact machine. Increasing impact energy was applied on the FFRP specimens until an occurrence of perforation. The effect of composite thickness and impact striker diameter were considered. The results showed that the striker diameter and composite thickness have a significant effect on the impact properties of the composites. It is also revealed the influence factors that control the impact behavior of FFRP composite that will be useful for developing future protective fiber-reinforced composites.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-03-09T08:00:00Z
      DOI: 10.1142/S0217979222400173
       
  • Nonlinear characterization of stress wave factor for plastic damage of
           A7N01P-T4 aluminum alloys

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      Authors: Feifei Qiu, Yuzi Hu, Binbin Wang, Bing Chen, Guoqing Gou, Zhongyin Zhu, Wei Lu
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      This paper studies the relationship between plastic damage and the ultrasonic nonlinear coefficient by changing the interior plastic strain of A7N01P-T4 aluminum alloys. An effective evaluation of the plastic damage of tensile test specimens was made by comparing with two different nonlinear ultrasonic detection methods, namely, nonlinear longitudinal wave method and surface wave method. The nonlinear coefficient of the stress wave factor was introduced to characterize the plastic damage for metallic materials. The results showed that with the increasing plastic damage degree, the nonlinear coefficient increased slowly at the early stage of yield hardening (3%) and then increased rapidly at the middle stage (3–5%). It is concluded that the nonlinear longitudinal wave is more suitable for point measurement and its sensitivity is lower than that of the longitudinal wave.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-03-09T08:00:00Z
      DOI: 10.1142/S021797922240029X
       
  • Effects of FeNiN phases on the corrosion behavior in 2205 duplex steels

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      Authors: Taotao Li, Shijie Ma, Shixin Feng, Ruxin Ren, Li Zhang, Huihu Lu, Guoping Li, Yaohui Zhang, Wei Fan, Chengzhi Liu, Diaoyu Zhou
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      Corrosion resistance is of practical importance for the application of 2205 duplex steels in chemical industries. For taking an insight into pitting corrosion behavior, electrolysis was employed to distinguish the 2205 duplex steel samples. In the following, X-ray diffraction, scanning electron microscopy and electron backscattering diffraction are used to characterize the regions with superior and inferior corrosion performance, thus constructing the relationship between the microstructure and their corrosion behavior.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-03-09T08:00:00Z
      DOI: 10.1142/S0217979222400318
       
  • The effect of process parameters on chemical mechanical polishing of
           quartz glass

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      Authors: Yang Yakun, Wang Zhankui, Pang Minghua, Li Yongfeng, Kumar Jena
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      The effects of polishing pressure, polishing speed and pH value of the polishing slurry on the chemical activity of quartz glass, the material removal rate (MRR) and surface roughness (Ra) of the workpiece were studied. Using MRR and Ra as evaluation indexes, three factors and four levels of the orthogonal test were used to perform chemical mechanical polishing on quartz glass. By measuring the contact angle between the polishing slurry and workpiece, the influence of different polishing slurries on the chemical activity of quartz glass surface was studied. The processing mechanism of CMP quartz glass was analyzed. The order of important factors affecting MRR of quartz glass was: pressure [math] rotation speed [math] pH value; the order of significant factors affecting Ra of quartz glass was: pressure [math] pH value [math] rotation speed. The optimum polishing process parameter combination of the MRR was: pressure 27.58 kPa, rotation speed 85 rpm, pH value 12; the optimum polishing process parameter combination of the Ra was: pressure 13.79 kPa, rotation speed 85 rpm, pH value 12. The MRR and Ra of the workpiece are evaluated from the mechanical action of pressure and speed and the chemical action of polishing slurry on the workpiece. The results proved that the effect of the alkaline polishing solution on MRR and Ra of quartz glass is more significant than that of the acidic polishing slurry.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-03-09T08:00:00Z
      DOI: 10.1142/S021797922240032X
       
  • Effect of reaction temperature on formation of [math]-Si3N4 nanowires by a
           simple CVD method

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      Authors: Li Yin, Kai Zhao, Zhihong Ma, Rongzheng Fan, Zhen He, Saifang Huang
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      [math]-Si3N4 nanowires were formed by a simple chemical vapor deposition (CVD) method using Si and SiO2 as raw materials without the addition of metal catalyst. The effect of reaction temperature on the phase composition and morphologies of the nanowires were analyzed by XRD and SEM. The experimental results indicate that a suitable reaction temperature is essential for the final products. At 1400[math]C, small amount of target products were obtained, and some irregular particles were attached on the surfaces of nanowires. When the temperature increased to 1450[math]C, the nanowires were mainly composed of [math]-Si3N4 phase, they had smooth surfaces with diameters fluctuating from 50 to 200 nm and lengths from hundreds to thousands of microns. At further high reaction temperature (1500[math]C), [math]-Si3N4 phase was observed and the nanowires had larger diameters, this was negative for obtaining purity [math]-Si3N4 nanowires. The growth process of [math]-Si3N4 nanowires was dominantly governed by the vapor–solid mechanism.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-03-09T08:00:00Z
      DOI: 10.1142/S0217979222400379
       
  • Numerical simulation for dynamic behavior of molten pool in cable-type
           welding wire GAMW

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      Authors: Zhidong Yang, Yuntao Chen, Dongdong Yang, Chenfu Fang, Guoxiang Xu, Yueyun Li
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      The cable-type welding wire gas (CWW) metal arc welding (GMAW) is an innovative arc welding process with high efficiency and high welding quality. However, there is still a lack of deep research on the molten pool of CWW-GMAW. The behavior of molten pool of CWW-GMAW was studied by both numerical simulations and experiments. The temperature field and flow field in the longitudinal section and across cross-section under the current of 450 A in CWW-GMAW were simulated. The result shows that the isotherm in front of the molten pool is denser than that in the back on the longitudinal section. The arc rotation force causes the velocity of the molten pool in the direction of weld penetration becoming more significant than that of weld width. The rotating momentum of the droplet affects the temperature distribution of the weld width and penetration on the cross-section of the molten pool. The coupling of electromagnetic force and rotating arc force makes the flow field present a clockwise vortex shape. The simulated results of weld geometries of CWW GMAW are in good agreement with the experimental results, indicating the applicability and accuracy of the established model.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-03-09T08:00:00Z
      DOI: 10.1142/S0217979222400434
       
  • Study of weld formation characteristics in laser-arc hybrid welding

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      Authors: Hongwei Sun, Zhidong Yang, Chenfu Fang, Yuntao Chen, Yongshun Zhang, Mingxiao Shi
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      The laser-arc hybrid welding was carried out on the marine-use steel, and the effects of primary parameters on weld behavior were investigated. The results show that the weld penetration increased gradually with the increase of laser power. Meanwhile, superior weld formation, penetration and reinforcement were achieved when laser and wire distance was 2 mm. The weld width, penetration and reinforcement were increased with the increase of current, while they were decreased with the increase of welding speed. The influence of laser power on the generated microstructure was analyzed by the observation in junction of weld and heat affected zone (HAZ). The microstructure of HAZ coarsened with the increase of laser power, which is consistent with the hardness distribution trend in HAZ.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-03-09T08:00:00Z
      DOI: 10.1142/S0217979222400446
       
  • Analysis and control of axial pressure in high-speed friction stir welding
           of alloy sheet

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      Authors: Yang Zhou, Shujin Chen, Longfei Chu, Xinyi Chen
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      Aiming at the high-speed friction stir welding deformation and thickness reduction of 1 mm 6061-T6 aluminum alloy sheet, the characteristics of the axial pressure of the welding process and its influence on the joint structure and mechanical properties were analyzed in this paper. Experiments were performed to optimize process parameters. A fuzzy controller with axial pressure error and its change rate as input and welding speed as output had been designed to realize axial pressure control during friction stir welding. The welding axial pressure fluctuates slightly around the target value, and the system was stable with the controller. Besides, the microstructure of the corresponding weld nugget area was uniform, dense, and the transition area was uniform without obvious welding defects. The joint hardness distribution was stable with the classic “W” shape distribution. The mechanical properties of the joint were excellent, and the tensile strength reaches 195 MPa, which was about 70% of the base material (290 MPa).
      Citation: International Journal of Modern Physics B
      PubDate: 2022-03-09T08:00:00Z
      DOI: 10.1142/S021797922240046X
       
  • Thermal conductivity estimation of silicon bulk material based on modified
           Raman thermal technique

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      Authors: Fangcheng Cao, Zhen He
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      The thermal conductivity of single-crystal silicon was investigated by using Raman spectroscopy. The laser simultaneously acted as an excitation source and a heating source. The correlations between Raman spectra with both temperature and laser power for single-crystal silicon, which has a potential relationship with the thermal conductivity, were estimated. The results showed the localized compressive stress caused by laser heating would underestimate Raman peak shift. So, the temperature was determined based on the variation of linewidth. The predicted thermal conductivity of single-crystal silicon is [math], which is comparable to the theoretical value.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-03-09T08:00:00Z
      DOI: 10.1142/S0217979222400501
       
  • Effects of different post-weld heat treatment conditions on mechanical
           properties and microstructure of welded joints

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      Authors: Kai Qi, Jingyuan Chen, Bin Liu, Fengjiang Wang
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      Post-weld heat treatment is a standard method to improve the performance of welded joints. Different heat treatment processes have different influences on the performance of welded joints. Therefore, it is of great significance to explore the impact of the heat treatment process on welded joints’ performance. This work applied three different heat treatment processes to the welded joints with three different properties. Then hardness test, impact test, tensile test, metallographic analysis and other means were used to evaluate the performance of welded joints after heat treatment. The following conclusions were drawn through the experiments: The change of phase compositions of the welded joints caused by the post-weld heat treatment was considered as the main reason for changes in mechanical properties of the welded joint. The difference in mechanical properties after different welding process and post-weld heat treatment combination was obtained, which has a guiding significance for practical production.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-03-09T08:00:00Z
      DOI: 10.1142/S0217979222400513
       
  • Corrosion fatigue crack propagation of 7XXX series aluminum alloys from
           key components of high-speed train

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      Authors: Liwen Dian, Wei Lu, Bing Chen, Guoqing Gou, Xiaoli Che, Zhongyin Zhu, Wei Gao
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      The corrosion fatigue cracks propagation behavior of A7N01P-T4 and A7N01S-T5 aluminum alloys in 3.5 wt.% NaCl solution and air were studied by single side notch corrosion fatigue tests (SNET). The crack growth rate (da/dN) was measured and the crack propagation mechanism was analyzed by scanning electron microscopic analysis. The results showed that the corrosion fatigue cracks growth rate of A7N01S-T5 alloy in air and 3.5 wt.% NaCl solution is faster than that of A7N01P-T4 alloy. The crack propagation follows a mixed intergranular and transgranular mode. The anodic dissolution and hydrogen embrittlement accelerate the propagation of corrosion fatigue crack of 7-series Al alloy in 3.5 wt.% NaCl solution. The corrosion resistance and fatigue crack propagation are related to the strength of the alloys and the density of grain boundaries.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-03-03T08:00:00Z
      DOI: 10.1142/S0217979222400239
       
  • Fatigue performance of CFRP/aluminum alloy riveted joints

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      Authors: Jia Chen, Zhibing Chen, Mingyue Zhang, Ziwei Xu, Jungang Chen, Jiafan Ye, Guoqing Gou, Wei Gao
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      Three types of CFRP/aluminum (Al) alloy riveted joints, single-rivet joint, double-rivet joint and three-rivet joint, were prepared by the riveting technique. The fatigue limit of the three-rivet joint was 27.35 MPa. The fatigue failure mechanism of the joint was that Al alloy cracks on the surface of rivet holes and propagates to fail.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-03-03T08:00:00Z
      DOI: 10.1142/S0217979222400252
       
  • Study of the polishing slurry dispersant for chemical mechanical polishing
           of 304 stainless steel

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      Authors: Su Jianxiu, Zhang Xu, Qi Wangting, Cao Xiaojun, Wang Zhankui
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      To further clarify the effect of the polishing slurry dispersant on the chemical mechanical polishing (CMP) performance of 304 stainless steel, a series of tests were carried out. The correlation between the material removal rate (MRR), surface roughness of 304 stainless steel, dispersant composition, and their content was investigated under two kinds of polishing slurry (hydrogen peroxide oxidant and ferric chloride oxidant) conditions. The experimental results indicated that the MRR and surface roughness of 304 stainless steel arrived at the maximum when the content of sodium hexametaphosphate dispersant was 1.2% (wt) under the hydrogen peroxide–oxalic acid polishing slurry condition. The values of MRR and surface roughness were 146 nm/min and 10 nm, respectively. The MRR and surface roughness of 304 stainless also reached the maximum value as the content of the propanetriol dispersant was 1.2% (wt) under the ferric chloride–oxalic acid polishing slurry condition. However, the values of MRR and surface roughness were 457 nm/min and 22 nm, respectively. Therefore, sodium hexametaphosphate was recommended as the dispersant of hydrogen peroxide–oxalic acid polishing, and propanetriol was recommended as the dispersant of ferric chloride–oxalic acid polishing slurry condition, according to the above analysis. This study lays a theoretical foundation for the improvement of 304 stainless steel CMP performance.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-03-03T08:00:00Z
      DOI: 10.1142/S0217979222400264
       
  • Tribochemical action on the tribochemical mechanical lapping (0001) C
           plane of the SiC single-crystal substrate

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      Authors: Yao Jianguo, Li Jiejing, Liu Haixu, Wang Zhankui, Zhu Yongwei, Su Jianxiu
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      The SiC single-crystal substrate with ultrasmooth and damage-free properties has potential applications in the field of optoelectronics and microelectronics. Lapping is one of the important processes for ultraprecision machining of the SiC single-crystal substrate. The lapping quality has an important impact on the surface quality, processing time, processing cost and processing efficiency of the subsequent chemical mechanical polishing (CMP) of the SiC single-crystal substrate. In this paper, four kinds of lapping pastes with different ingredients were prepared. The tribochemical action and mechanism of the oxidant in the lapping paste were studied. The results show that NaOH can be used as an oxidant for the tribochemical mechanical lapping of the SiC single crystal. Under the catalysis of iron oxide and frictional force, the tribochemical reaction between the SiC single-crystal substrate and the oxidant NaOH occurred and the silicon oxides (such as SiO[math], gaseous carbon oxides and other reactants were produced. The surface energy of the SiC substrate was reduced and the material removal rate was improved effectively. These results can provide a reference for further research on the mechanism of tribochemical mechanical lapping.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-03-03T08:00:00Z
      DOI: 10.1142/S0217979222400276
       
  • Correlation between microstructure and corrosion resistance of amorphous
           Ni–W–P coatings after low-temperature heat treatment

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      Authors: Guanlin Zhao, Shushuai Liu, Dongting Wu, Yong Zou
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      Amorphous Ni–W–P coatings were prepared by electroless plating and annealed at 250[math]C for different times to obtain different microstructures. The local atomic structure of these amorphous coatings was analyzed by calculating the atomic pair distribution function from the XRD patterns. The type of crystals in coatings was obtained from the TEM image and corresponding selected area diffraction (SAED) pattern. The proportion of microscopic particles in the matrix was roughly estimated from the first DSC exothermic peak area. Corrosion resistance in 0.5-M sulfuric acid solution was investigated via electrochemical techniques. Experimental results showed that all annealed coatings still held amorphous structure, albeit the microstructure had been changed. The correlation radius and the atomic number of clusters had increased, especially when the annealed time extended to 12 h and 20 h. The number of microscopic particles in the amorphous matrix also increased with rise in heat treatment time. The type of crystals in these amorphous matrices increased from Ni/Ni (W) to Ni/Ni (W), Ni[math]P5 and Ni5P4. The decreasing corrosion resistance was in agreement with the increasing number of microscopic particles and higher-order clusters in annealed Ni–W–P coatings. These microscopic particles could form micro-galvanic cells in corrosion solution. The higher-order clusters increased the composition difference in the amorphous matrix, and this also promoted to form micro-galvanic cells in solution.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-03-03T08:00:00Z
      DOI: 10.1142/S0217979222400549
       
  • The fatigue fracture of mounting bracket: A microstructure
           characterization

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      Authors: Yu Zhang, Fan Ye, Ting Qian, Jin Yan, Kaiyuan Chen, Guang Cheng, Yuxin Wang
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      We report the fatigue fracture in a mounting bracket, which is attached to a front bumper. We conducted the macro- and micro-scale fracture morphology analyses and base materials characterization. We used a bracket made of QSTE 420 TM high-strength steel and did not find any metallurgical defects. Three cracks were formed on the bracket, and the cracks were initiated from the outer edges of the screws. From the scanning electron microscopy (SEM) images, we observed ratchet marks among the three cracks at their initiation positions with a similar distance between each other. We also observed fatigue striation in the propagation zones. We deduce from the macro- and micro-scale analyses that the three cracks were initiated and then expanded spontaneously with a similar growth rate. The stress concentration, assembly operation and joining effects cause the bidirectional bending fatigue fracture in the three locations. Optimized tightening forces and new gaskets are recommended to extend the fatigue life of the mounting bracket.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-03-03T08:00:00Z
      DOI: 10.1142/S0217979222400550
       
  • The corrosion resistance of porous Ni–Ti alloys in seawater

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      Authors: Liang Wu, Jiajia Huang, Wen Liu, Jinwei Chen, Xi Li, Qiankun Zhang, Chun Li
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      Porous Ni–Ti alloys were fabricated by reactive synthesis of Ni and Ti elemental powders. The corrosion behavior of porous Ni–Ti alloys was explored by electrochemical methods and weight change measurements at 298 K in seawater. The polarization curves and electrochemical impedance spectroscopy data show that porous Ni–Ti (6.5:3.5) alloys provide the best corrosion resistance. The values of corrosion current density and corrosion rate are [math] mA/cm2 and 1.9929 mm/a, respectively. The corrosion behavior and corrosion mechanism of porous Ni–Ti alloys are also discussed.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-03-03T08:00:00Z
      DOI: 10.1142/S0217979222400616
       
  • Effect of micro-grooved texture on cutting performance of tool under dry
           condition

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      Authors: Minghua Pang, Hui Yang, Yongfeng Li, Zhankui Wang, Lijie Ma, Jianxiu Su, Muhammad Hayat
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      To clarify the anti-adhesive properties of the textured tool, two types of micro-grooved textures were fabricated on the tool rake face. The cutting tests were conducted on aluminum alloys under no lubrication condition. Experimental results showed that the cutting force, tool–chip friction coefficient, and surface wear of the P_1 textured tool decreased. However, noticeable disadvantages were observed in samples with other textures. Detailed research indicated that the chip material (Al alloy) was easy to squeeze into and clog in the micro-grooved texture, due to low hardness and high ductility. In contrast, the cutting force, tool–chip interfacial friction, and wear of steel samples with T_1, T_2, and P_2 textures were all greater than that of the nontextured tool. The difference observed in these various textures signifies the importance of the small geometric size of the surface texture in the P_1 texture. Thus, an improvement of tool anti-adhesion with aluminum alloy material was obtained under dry cutting conditions.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-03-03T08:00:00Z
      DOI: 10.1142/S0217979222400707
       
  • Characteristics study of thin-walled circular copper tubes for impact
           transformation

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      Authors: Zonglai Mo, Zhuoyu Guo, Shihao Song, Jiahui Lin, Jun Li
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      An axial bulking mode of the thin-walled tube is proposed and investigated experimentally, for the purpose of transforming a pulse impact into a controllable impact. Two types of thin-walled circular copper tubes with different structures are designed based on the basic circular tubes (BCTs), namely, the uniform grooved tube (UGT) and the circumferential opening grooved tube (CGT). Then, the impact characteristics of a series of copper tubes are investigated experimentally. Results show that BCTs are compressed into two-fold forms during impact, where compression deformation occurs at the thin-walled section and a fold is formed at each thin-walled section. BGTs, UGTs, and CGTs show different performances in terms of transforming impact, and impact output via CGT can be controlled by modifying its structural parameters.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-02-26T08:00:00Z
      DOI: 10.1142/S0217979222400185
       
  • Effect of dispersion method on microstructure and properties of
           Ni-P–Al2O3 (sol)-PTFE composite coating

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      Authors: Hongjiang Han, Yongfeng Li, Zongju Yang, Mengyu Liu, Peng Cao, Pingmei Ming, Yaqi Zhang, Mingming Zhang
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      In order to alleviate the agglomeration of nanoparticles in the plating solution, the dispersion effect of binary nanoparticles in Ni–P–Al2O3–PTFE composite coating was studied by physical and chemical dispersion methods. The effects of different dispersion methods on the microstructure, hardness and friction coefficient of the composite coating were discussed. Through the performance evaluation of the composite coating, it is found that the effect of using appropriate dispersant and ultrasonic dispersion process is good, which can make the nanoparticles fully dispersed in the solution and evenly distributed in the coating, the composite amount of nanoparticles in the deposition layer is also high. The results show that it has a good effect on improving the wear-resisting and antifriction properties of the composite coatings.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-02-26T08:00:00Z
      DOI: 10.1142/S0217979222400240
       
  • Effects of VC, M3C precipitates on the mechanical properties of
           Cr–Mo–Ni–V steels

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      Authors: Yunfei Du, Guodong Li, Li Zhang, Zhijie Xin, Hongbin Miao, Meini Yuan, Huihu Lu
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      In this study, various austenitizing temperatures were selected to explore their influence on the microstructure and mechanical properties of Cr–Mo–Ni–V steels. The dissolution of primary carbides during the quenching process and the precipitation behavior of carbides during the tempering process for the steels were investigated using SEM and EDS analyses. As the austenitizing temperature increases from [math]C to [math]C, VC can be dissolved into the matrix, and the pinning effect of VC on prior austenite grains is weakened. The dissolved V in the quenched condition has a retarding effect on the carbide precipitation upon tempering. With the austenitizing temperature increasing, both tensile strength and elongation of tempered steels are increased, as well as the impact toughness.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-02-26T08:00:00Z
      DOI: 10.1142/S0217979222400288
       
  • Process optimization of pulse-assisted chemical deposition of Ni–P
           coating

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      Authors: Zongju Yang, Yongfeng Li, Hongjiang Han, Chenming Zhang, Haoyuan Leng, Mingming Zhang, Yaqi Zhang, Pingmei Ming, Wei Gao
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      In this study, the problems of the low deposition rate and bath instability in chemical deposition can be effectively solved by using the pulsed current-assisted chemical deposition process when preparing Ni–P alloy coating. Orthogonal experiments were designed by changing the average current density, pulse frequency and duty ratio of the pulses to study their effects on the deposition rate and hardness of the coatings. Compact Ni–P coating with uniform surface morphology and good performance was prepared by parameter optimization. The results show that our method can greatly improve the deposition rate while ensuring the surface quality and performance of the deposited layer.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-02-26T08:00:00Z
      DOI: 10.1142/S0217979222400306
       
  • Effects of aging time on the crystallization/transformation of
           hydrothermal synthesis alkali-activated fly ash-based zeolite

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      Authors: Fangcheng Cao, Yiping Ouyang, Zekun Huang, Yuting Gong, Yuebing Hu, Zhen He
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      Zeolites with unique framework structure have wide applications, such as ions’ exchangers, molecular sieves and catalysts. This work focused on the synthesis and characterization of zeolite by recycling coal fly ash as the starting material via hydrothermal method. The intermediate phases and final products were characterized by XRF, XRD, FT-IR, SEM and BET techniques. The effects of aging time on the crystallization/transformation of zeolite were discussed. The results showed that the alkali-activated coal fly ash after hydrothermal process could lead to the formation of zeolite Na-P1. Furthermore, the aging treatment benefited the formation of homogenous zeolite Na-P1 with smaller particle size, larger specific surface area, total pore volume and pore size.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-02-26T08:00:00Z
      DOI: 10.1142/S0217979222400331
       
  • Effect of current density on the performance of electrodeposited
           Ti/Sb–SnO2 electrode from methanesulfonate medium

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      Authors: Shengping Zhang, Wenping Huang, Jinyi Tan, Wen Zhang, Zhen He
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      A series of Ti/Sb–SnO2 electrodes were prepared by direct current electrodeposition. The changes of catalytic properties of Ti/Sb–SnO2 electrodes prepared at different current densities were studied. The surface morphology and catalytic performance of Ti/Sb–SnO2 electrodes were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and high-performance liquid chromatography (HPLC). The oxygen evolution potentials of the electrodes were measured by linear sweep voltammetry (LSV) at the same time. The results show that the increase of the current density can improve the polarization and the electrolysis reaction of water, changing the surface morphology of Ti/Sb–SnO2 electrodes. When the current density increases to 30 mA/cm2, the porous structure is formed on the electrode surface, which provides more active sites for the Ti/Sb–SnO2 electrode surface and improves the catalytic ability of the electrode greatly. However, when the current density continues to increase, the catalytic ability of the electrode will decrease. This is because the excessively high current density will lead to the loose structure of the electrode surface, which is not conducive to the improvement of the catalytic efficiency of Ti/Sb–SnO2 electrodes.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-02-26T08:00:00Z
      DOI: 10.1142/S0217979222400343
       
  • Indentation of piezoelectric micro- and nanostructures

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      Authors: Guang Cheng, Yue Lu, T. A. Venkatesh
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      This study is focused on obtaining a comprehensive understanding of the influence of geometry — size and shape — on the indentation response of a large set of piezoelectric small-volume structures such as nanoislands, nanowires and thin films. Using three-dimensional finite element modeling, the complex interplay between the properties of the indented materials and the indentation response of piezoelectric micro- and nanostructures is analyzed. It is demonstrated that: (i) In general, the indentation response of thin film structures tends to be much stiffer than that of the piezoelectric nanoisland and nanowires, resulting in more charges being generated during the indentation of the thin-film structures. (ii) The indentation of the piezoelectric nanowire structures with a spherical indenter whose radius is substantially larger than the width of the nanowires, introduces a combination of deformation modes — structural bulging and indentation-induced compression. The combined effect of two deformation modes produces a maximum in the charges generated during the indentation process on a nanowire structure with a particular aspect ratio (i.e., wire width/wire height), which is greater than that produced in nanoisland and thin films structures with the same characteristic size.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-02-26T08:00:00Z
      DOI: 10.1142/S0217979222400355
       
  • The wear resistance of Al–Si–Re alloys for electrical contact
           applications

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      Authors: Guang Cheng, Hao Wang, Yuxin Wang, Hongtao Sui, Pengfei Yan, Biao Yan
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      We prepared aluminum–silicon–rare earth (Al–Si–Re) elements alloys for electrical contact applications. Three Si weight percentages (wt.%) — 10%, 20% and 30% — were used, and rare earth (Re) elements were kept at 0.35 wt.%. The spraying forming process was adopted, and high-pressure hot isostatic pressing (HIP) was conducted to obtain the bulk materials from the as-deposited billets. The electrical conductivity of alloys with 10% and 20% Si reached 40% International Annealed Copper Standard (IACS). The hardness of Al–Si alloys significantly increased with Si content and HIP processing times. The hardness of alloy with 30% Si reached [math]90 HV. Meanwhile, HIP reduced weight loss in the wear resistance by reducing the microcracks and materials removal. The current study proposes an approach to manufacture Al–Si alloys with high electrical conductivity and high wear resistance.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-02-26T08:00:00Z
      DOI: 10.1142/S0217979222400367
       
  • Recent developments of lead dioxide electrodes electrodeposited from
           methanesulfonate electrolytes

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      Authors: Jinyi Tan, Dongdong Zhang, Wenping Huang, Zhen He
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      Lead dioxide (PbO[math] electrodes have been actively studied since their large-scale application in energy storage industries in the late 20th century. In modern industry, PbO2 electrodes are anodically electrodeposited from the oxidizing and toxic chloride and nitrate systems. In recent studies, the PbO2 electrodeposition from methanesulfonate medium is widely proposed owing to the large ion solubility and environmental friendliness. The further developments in PbO2 electrodeposited from methanesulfonate electrolytic system is now becoming increasingly important and its future scale-up applications could be envisaged. In this regard, this review illustrates the recent developments of lead dioxide electrodes prepared from methanesulfonate electrolytes.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-02-26T08:00:00Z
      DOI: 10.1142/S0217979222400409
       
  • Effect of rolling on microstructure and mechanical properties of HPS
           Al/Mg/Al composite plates

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      Authors: Yang Yu, Pengfei Yan, Tingxi Chai, Biao Yan
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      Al/Mg/Al composite plates were fabricated by hot pressed sintering (HPS) and hot rolling. The main purpose of this study is to understand the effect of rolling on the microstructure, interface and mechanical properties of HPS Al/Mg/Al composite plates. Rolling can increase the compactness of the microstructure by improving the distribution of internal voids and promote the diffusion of interfacial elements, forming a transition layer consisting of phases [math]-Al3Mg2 and [math]-Al[math]Mg[math], which improves the strength, plasticity, interfacial bonding strength and interfacial deformation compatibility of the HPS Al/Mg/Al composite plates. The bending strength, tensile strength and elongation of HPS Al/Mg/Al composite plates after rolling are 520 MPa, 300 MPa and 17%, respectively. The fracture mode changes from brittle intergranular fracture to ductile dimple.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-02-26T08:00:00Z
      DOI: 10.1142/S0217979222400562
       
  • The microstructure and compressive properties of a sintered Fe–Mn–Al
           porous steel produced by blended elemental powder mixture

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      Authors: Zhigang Xu, Jinrong Liang, Jingheng Du
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      In this study, powder compacts produced by mixed elemental Fe, Mn, Al and C powders without ball milling were sintered at [math]C and [math]C, respectively. The results revealed that intermetallic phases belonging to Fe2Al5 and Al8Mn5 appeared after pre-sintered at [math]C. When the temperature increased to [math]C, only [math]-Fe phase existed. The total porosities of the sintered samples were [math] vol.% at [math]C and [math] vol.% at [math]C, and the peak compressive strength of the [math]C-sintered samples was [math] MPa at the strain of [math].
      Citation: International Journal of Modern Physics B
      PubDate: 2022-02-26T08:00:00Z
      DOI: 10.1142/S0217979222400586
       
  • Research on fatigue crack growth behavior: Experimental and prediction
           method of titanium alloy

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      Authors: Li Yongzheng, Huang Xiangyu, Wang Ke, Bai Xu, Li Yanqing, Zhang Shixin, Bian Chao, Bian Chengcheng, Gao Longqian, Wu Li
      Abstract: International Journal of Modern Physics B, Ahead of Print.
      A new type of titanium alloy for the pressure shell of a manned deep-sea submersible is studied. The fatigue performance and the fracture toughness of the titanium alloy are obtained under [math], 0.3, and 0.5. The curves of fatigue crack growth rate under three load ratios are predicted based on the existing fatigue crack growth rate prediction model. The results show that the fatigue crack growth threshold decreases with the increase of the load ratio, and the fatigue crack growth rate increases with the increase of the load ratio. The fatigue crack growth prediction model can accurately predict the fatigue crack growth rate of titanium alloy under different load ratios.
      Citation: International Journal of Modern Physics B
      PubDate: 2022-02-26T08:00:00Z
      DOI: 10.1142/S0217979222400719
       
 
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