Subjects -> MANUFACTURING AND TECHNOLOGY (Total: 363 journals)
    - CERAMICS, GLASS AND POTTERY (31 journals)
    - MACHINERY (34 journals)
    - MANUFACTURING AND TECHNOLOGY (223 journals)
    - METROLOGY AND STANDARDIZATION (6 journals)
    - PACKAGING (19 journals)
    - PAINTS AND PROTECTIVE COATINGS (4 journals)
    - PLASTICS (42 journals)
    - RUBBER (4 journals)

MACHINERY (34 journals)

Showing 1 - 27 of 27 Journals sorted alphabetically
Acta Mechanica Solida Sinica     Hybrid Journal   (Followers: 8)
Advanced Energy Materials     Hybrid Journal   (Followers: 31)
Applied Mechanics Reviews     Full-text available via subscription   (Followers: 27)
CORROSION     Full-text available via subscription   (Followers: 20)
Electric Power Components and Systems     Hybrid Journal   (Followers: 7)
Foundations and Trends® in Electronic Design Automation     Full-text available via subscription   (Followers: 1)
International Journal of Machine Tools and Manufacture     Hybrid Journal   (Followers: 8)
International Journal of Machining and Machinability of Materials     Hybrid Journal   (Followers: 4)
International Journal of Manufacturing Technology and Management     Hybrid Journal   (Followers: 8)
International Journal of Precision Technology     Hybrid Journal   (Followers: 1)
International Journal of Rapid Manufacturing     Hybrid Journal   (Followers: 3)
International Journal of Rotating Machinery     Open Access   (Followers: 2)
Journal of Machinery Manufacture and Reliability     Hybrid Journal   (Followers: 2)
Journal of Manufacturing and Materials Processing     Open Access  
Journal of Mechanics     Hybrid Journal   (Followers: 9)
Journal of Strain Analysis for Engineering Design     Hybrid Journal   (Followers: 5)
Journal of Terramechanics     Hybrid Journal   (Followers: 4)
Machine Design     Partially Free   (Followers: 184)
Machine Learning and Knowledge Extraction     Open Access   (Followers: 12)
Machines     Open Access   (Followers: 4)
Materials     Open Access   (Followers: 4)
Mechanics Based Design of Structures and Machines: An International Journal     Hybrid Journal   (Followers: 8)
Micromachines     Open Access   (Followers: 2)
Pump Industry Analyst     Full-text available via subscription   (Followers: 1)
Russian Engineering Research     Hybrid Journal  
Sensor Review     Hybrid Journal   (Followers: 2)
Surface Engineering and Applied Electrochemistry     Hybrid Journal   (Followers: 6)
Similar Journals
Journal Cover
Surface Engineering and Applied Electrochemistry
Journal Prestige (SJR): 0.225
Citation Impact (citeScore): 1
Number of Followers: 6  
 
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 1068-3755 - ISSN (Online) 1934-8002
Published by Springer-Verlag Homepage  [2469 journals]
  • Study of Corrosion Behavior of Coatings Produced on Steel with
           Electrospark Alloying Using a Hand High-Frequency Vibrator

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      Abstract: The comparative corrosion resistance in acidic, alkaline, and neutral environments of pure metals (steel, nickel, titanium) and of nickel and titanium coatings produced on steel using electrospark alloying with a high-frequency vibrator is investigated. It is established that the phase structure, roughness, and porosity of received coatings depend on the electrode material and on the modes of coating application that affect the corrosion behavior. A positive influence of the high-frequency alloying with nickel and titanium on an increase in the corrosion resistance of the steel surface is shown.
      PubDate: 2022-04-01
       
  • Initiation of Electrical Discharge in Water Using a Thin-Layer Conductor

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      Abstract: The results of experimental study of pressure waves produced during electrical discharges in water initiated with a thin-layer copper conductor in the form of a nylon thread coated with a thin copper layer are presented. The experiments are performed in two different modes that provide discharges of shorter and longer periods. Use of the thread with a thin copper layer is a promising approach to initiating electrical discharges in water because it allows the shorter prebreakdown stage, lower prebreakdown energy losses, spatially more stable discharges, and improved effectiveness of discharge impact. The amplitude of pressure waves produced during short electrical discharges is comparable to that observed when using a thin solid copper conductor for initiation, with the amplitude of generated pressure wave growing exponentially with the wire length: more than a twofold increase in the amplitude is observed as the wire length increases from 20 to 50 mm. Similarly, it is shown that the thread with thin copper layer has a good stability under the conditions prevailing during electrical discharges in water.
      PubDate: 2022-04-01
       
  • Possibilities and Prospects for Improving the Tribological Properties of
           Titanium and Its Alloys by Electrospark Deposition

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      Abstract: This paper discusses the essence and technological characteristics of the process of electrospark deposition (ESD), its advantages and disadvantages with a view to its application for improving the tribological properties of titanium and its alloys. A summary of the available data and results in the literature devoted on the ESD of titanium and its alloys has been made. Based on the published data, a comparative analysis of the technical parameters and technological capabilities of the most common equipment, including contactless ESD, is presented. The geometrical and physico-mechanical characteristics of the coatings obtained with different equipment and the nature of their change depending on the technological parameters of the ESD mode and the type of the anode and cathode materials are shown. A summary of the data on the wear resistance of the coatings obtained with different electrode materials and modes are given. It has been demonstrated that ESD can be successfully applied to improve the wear resistance of titanium surfaces. Suitable electrode materials and process parameters for ESD on titanium alloys are indicated.
      PubDate: 2022-04-01
       
  • Peculiarities of the Evolution of Electrical Discharge Cavitation in a
           Magnetic Field

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      Abstract: The article is devoted to studying the electrical discharge cavitation development in a liquid working medium (water, aqueous electrolytes) placed in an external magnetic field. The main stages of an electrical discharge in an aqueous medium under the influence of an external magnetic field on the discharge gap are considered. A theoretical analysis of the preconditions for the magnetic field’s influence on the development of an electrical discharge in aqueous media is implemented. The experimental data obtained using high-speed photographic recording and measuring the cavitation intensity by the iodometric method allowed the authors to propose a concept for controlling the electrical discharge cavitation processes by external magnetic fields.
      PubDate: 2022-04-01
       
  • Impact of Silica Concentration on the Calcium Phosphate-Based Composite
           Coatings Prepared by Pulsed Co-Electrodeposition

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      Abstract: In this study, calcium phosphate/nano silica (CaP/SiO2) composite coatings with different concentrations of silica were developed on the pretreated titanium using pulsed co-electrodeposition to improve their biocompatibility. The scanning electron microscopy images showed that silica nano-particles could act as nucleators for the CaP crystals during electrodeposition; therefore, all composite coatings showed different morphologies, in comparison with the pure CaP one. Increasing the concentration of silica particles in bath to 1 g/L changed the morphology of the composite coatings from the clove-like structure to the sunflower-like one. Next, the composite coating obtained from the bath containing 1 g/L silica revealed poor coverability, and some uncoated areas were found on the surface of the pretreated titanium substrate. In addition, the results of cell culture test demonstrated that the coated areas were more biocompatible so that the fibroblast cells were only adhered onto the areas covered with the CaP-based coating.
      PubDate: 2022-04-01
       
  • Antimicrobial Activity of Silver Nanoparticles on Pseudomonas aeruginosa:
           Influence of Particle Size Controlled through Mixed Current

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      Abstract: The antibacterial behaviour of silver nanoparticles (AgNPs) on polyurethane (PU) catheter substrate was demonstrated in the present study. The deposition of AgNPs on PU was developed using the electroless deposition method. Controlling the size of sliver particles on PU and analysing the usage of PU containing AgNPs as an effective antibacterial and antiviral candidate with minimal cytotoxic effects on the cells were the aim of this study. The superimposed partial anodic and cathodic polarization curves under respective parametric conditions were studied in order to control the size by using the mixed current value. The interaction of AgNPs-deposited PU with Pseudomonas aeruginosa caused a significant effect on the antibacterial activity. The AgNPs-deposited PU materials were characterized by scanning electron microscopy and X-ray diffraction. The deposited AgNPs were found to be agglomerated, but poly-dispersed and crystalline in nature. The average size of the deposited particles was around 48–1580 nm. P. aeruginosa produced an inhibition zone having a diameter in a range of 15.8–18.0 nm. The bacterial growth was suppressed in the presence of a lower agglomerated size of silver particles. These results conclusively proved the importance of the knowledge of role of the mixed current in electroless deposition to control the size and the deposited AgNPs on PU as antimicrobial agents/material for therapeutic purposes in medical applications.
      PubDate: 2022-04-01
       
  • Electrochemical Deposition of Zinc Sulfide from a Na2SO3-Based Electrolyte

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      Abstract: — Aspects of electrochemical deposition of zinc sulfide from an aqueous electrolyte based on sodium sulfite and zinc sulfate are addressed, and conditions for electrochemical synthesis of ZnS films are identified. The range of potentials for ZnS deposition is demonstrated to be limited by the potential at which the current reaches the critical value associated with diffusion-limited electrochemical reduction of the sulfite ion. The synthesized films are found to contain excess sulfur, which can be removed by thermal treatment to obtain stoichiometrically correct films. A reaction mechanism leading to the formation of zinc sulfide is proposed.
      PubDate: 2022-04-01
       
  • Enhancing the Electroplated Chromium Coating for Corrosion Protection of
           Aluminum by Adding Graphene Oxide

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      Abstract: The effect of the addition of graphene oxide (GO) particles to the chromium electroplated coating on the surface of commercially pure aluminum (Al 1100) was studied in this paper. The synthesized coatings microhardness was characterized by the atomic force microscopy, field emission scanning electron microscopy, and the corrosion behavior was evaluated by using polarization and electrochemical impedance spectroscopy in the 3.5 wt % NaCl solution. The obtained Cr/GO nanocomposite shows remarkable improvement in the value of the surface microhardness, and the highest value achieved at the sample composed with 10 wt % of GO equals 1526 HV0.5. The results gained from polarization and electrochemical impedance microscopy demonstrated that the sample with the 5 wt % of GO has better corrosion resistance, which is due to the coating compactness and active galvanic couples.
      PubDate: 2022-04-01
       
  • Photoelectrocatalysis Response with Synthetic Mn–N–TiO2/Ti Electrode
           for Removal of Rhodamine B Dye

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      Abstract: The photoelectrocatalytic (PEC) degradation of rhodamine B (RhB) organic dye using manganese (Mn)-nitrogen (N) doped titanium oxide (TiO2) electrode was investigated under two applied electrochemical modes such as cyclic voltammetry (CV) and linear-sweep voltammetry (LSV). The synergetic effect between light variation and photocurrent response demonstrated that the TiO2 thin films were active under the ultraviolet (UV) light illumination with a photocurrent value (Ipa) of 2.65 µA; meanwhile, the Mn–N–TiO2 was periodically activated under visible (Vis) light illumination with Ipa of 3.63 µA. In addition, the photolysis was evaluated to compare the degradation effect under varying light illuminations without catalyst with the PEC system. The good ability of TiO2 to degrade RhB under UV light was found with a percentage degradation value at 0.5 mg L–1 of 63%. In comparison, the Mn–N–TiO2 was activated under Vis light with 0.5 mg L–1 of 74.2%.
      PubDate: 2022-04-01
       
  • Asymptotic Analysis of Nonlinear Resonanсe Interaction between Capillary
           Waves with Arbitrary Symmetry on a Moving Charged Jet at Multimode Initial
           Deformation

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      Abstract: — The study of a nonlinear resonance between the capillary waves on the surface of a moving charged jet relative to the material medium at a multimode initial deformation is considered. In analytical asymptotic calculations of the second order of smallness according to dimensionless amplitude of oscillations, it is shown that realization of internal nonlinear resonant interaction of capillary waves of arbitrary symmetry takes place on the jet surface both of degenerate and secondary combinational. The resonances positions depend on the system’s physical parameters: the values of surface tension coefficients and the radial electric field intensity near the jet surface, the velocity of its motion with respect to the material medium, the values of the waves and azimuthal numbers of the interacting waves, spectrum of the waves that define the initial deformation.
      PubDate: 2022-04-01
       
  • Electrospun Polyvinylidene Fluoride Nanofiber Membrane-Based Flexible
           Capacitive Tactile Sensors for Biomedical Applications

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      Abstract: Polyvinylidene fluoride (PVDF) is a high-performance polymer with excellent ferroelectric, piezoelectric and pyroelectric properties. The electrospun PVDF has gained much attention in the design of tactile sensors based on piezoelectricity. This study aims to develop piezocapacitive sensors for measuring static pressure, which cannot be done by piezoelectric sensors. Electrospun PVDF nanofiber membranes with relatively uniform morphology were prepared using an electrospinning technique. The surface morphology of the electrospun PVDF nanofibers was analyzed by scanning electron microscopy, and their microstructure was characterized by the Fourier transform infrared and Raman spectroscopies. Infrared vibrational spectroscopy data revealed a ferroelectric polar β-phase in the as-fabricated and untreated membranes. It was demonstrated that the electrospinning technique can induce crystalline and polar β-phase by applying an electric field to the PVDF polymer solution during solution jet stretching. The piezocapacitive membranes with full-face copper electrodes were fabricated and then sandwiched between Kapton polyimide films to form a sensing device. The results indicated a linear piezocapacitive-force behavior. Thus, PVDF electrospun membranes can be used to create highly flexible pressure sensors. Several potential biomedical applications of these PVDF nanofiber based membranes in the form of flexible capacitive pressure sensors are discussed.
      PubDate: 2022-04-01
       
  • Electrochemical Sensor Based on a Modified Graphite Screen Printed
           Electrode for Amitriptyline Determination

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      Abstract: In this study, a graphene oxide (GO)/Fe3O4@SiO2 nanocomposite was synthesized and used to modify a graphite screen printed electrode (GSPE) by drop casting, a simple and easy technique, in order to electrochemically detect amitriptyline. Electrooxidation of amitriptyline was studied on the GO/Fe3O4@SiO2/GSPE using cyclic voltammetry, linear sweep voltammetry, differential pulse voltammetry, and chronoamperometry. The oxidation peak potential of amitriptyline on the GO/Fe3O4@SiO2/GSPE appeared at 800 mV, which was accompanied with a lower overpotential and an increase in the oxidation peak current compared to that obtained on a bare GSPE. Under the optimized conditions, the method used in preparation showed a good dynamic concentration range from 2.0 to 1000.0  µM, with a limit of detection 0.5 µM. The modified electrode was successfully applied to amitriptyline determination in real samples.
      PubDate: 2022-02-01
       
  • About the Force of Electrostatic Interaction between Two Conducting Discs

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      Abstract: Electrostatic interaction of two conducting bodies with preset charges on their surfaces in a zero external field is considered. The electrostatic induction is taken into account. The calculations are carried out by the higher order h-adaptive finite element method. The force of interaction between two conducting coaxial discs is presented. The interaction of a body in the form of a disk and a body in the form of a ball is also considered. Using numerical calculations, it is shown that, when the distance between the bodies is increased the force of interaction between charged and uncharged bodies is determined, already at distances comparable with the size of them, mainly by the shape of the uncharged body.
      PubDate: 2022-02-01
       
  • Formation of Intermetallic Compounds in Al–Cu Interface via Cold
           Roll Bonding: Review

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      Abstract: The composites consisting of similar or dissimilar metallic layers with different physical properties are vastly applicable. Among various methods for producing these composites, cold roll bonding (CRB) is considered to be more efficient and more cost-effective than other bonding processes. Nowadays, Al-Cu layer composite bonds are favorable in different industries due to their low price, well conductibility, high corrosion resistance, high deformation, and good electrical conduction. This review paper deals with the investigations of the Al-Cu cold rolling process, of the bonding mechanism of metallic layers during CRB, and of the effect of the roll bond strength parameters such as initial thickness, for one. Roll bonding has three levels: (1) physical touch; (2) activating surfaces in touch; (3) interaction between bonding metals. CRB is supposed to be an in-plane strain, and the normal stress distributed on the top and bottom rollers is homogeneous. Annealing before and after rolling, the direction and speed of rolling, the amount of thickness reduction, and the lubrication conditions on the Al–Cu bond through the roll bonding process were studied. The effect of different annealing conditions on the produced intermetallic compounds at the Al–Cu rolling bond interface and the growth of the intermetallic phases and their impact on the CRB parameters was examined. The thickness of intermetallic compounds, thickness reduction under the rolling process, the rolling speed, the annealing temperature, and time affected the bond strength. The effect of the rolling speed on the bond strength depends on the touching time between the sheets during rolling, which means that the touching time between two surfaces of Al and Cu sheets reduces at higher rolling speeds. As a result, the chance for proper bonding is lost, and, therefore, the bond strength is decreased.
      PubDate: 2022-02-01
       
  • Ti3C2 Nano Layer Modified Screen Printed Electrode as a Highly Sensitive
           Electrochemical Sensor for the Simultaneous Determination of Dopamine and
           Tyrosine

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      Abstract: A highly sensitive method is proposed for the simultaneous determination of dopamine and tyrosine using a Ti3C2 nano layer modified screen printed electrode. The electro-oxidation of dopamine at the surface of the modified electrode was studied using cyclic voltammetry, chrono-amperometry, and differential pulse voltammetry. Under the optimized conditions, the differential pulse voltammetric peak current of dopamine increased linearly with dopamine concentrations in the ranges of 0.5–600.0 µM, and the detection limit of 0.15 µM was obtained for dopamine.
      PubDate: 2022-02-01
       
  • Nonlinear Correction to the Intensity of Dipole Radiation of an Uncharged
           Drop Oscillating in an External Electrostatic Field

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      Abstract: The dipole electromagnetic radiation emitted by an uncharged electrically conducting drop oscillating with a finite amplitude in an external electrostatic field is obtained via asymptotic calculations performed up to the second order of smallness in terms of the ratio of oscillation amplitude to initial drop radius. It is found that the first vibrational mode is excited in the second order of smallness. As a result, the centers of induced unlike charges oscillate synchronously, and the drop emits dipole electromagnetic waves, which gives rise to a nonlinear correction term to the first-order dipole radiation intensity. Estimations are made for the intensity of electromagnetic radiation associated with this correction term and for the frequency range depending on the drop size and the strength of external electrostatic field.
      PubDate: 2022-02-01
       
  • Pseudocapacitance of Microporous Carbon/Polyaniline Composites

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      Abstract: High capacity (>200 F/g) supercapacitor electrodes have been fabricated by blending high surface area microporous carbon and polyaniline. The incorporation of a conducting polymer is expected to stabilize the microporous graphitic layers to form a conductive porous composite to increase the capacitance. Well-organized nano- and micropores are believed to facilitate rapid ion diffusion especially when the micropore size is comparable to the ionic radii in the electrolyte solution thereby greatly boosting the capacitance. The initial capacitance of ~110 F/g of the microporous carbon network was found to increase to ~224 F/g (>100% increase) after the incorporation of polyaniline in the 1 M H2SO4 aqueous electrolyte. The non-linear behavior in the charge/discharge galvanostatic curve and the appearance of additional redox peaks in the capacitance-voltage curves confirm the presence of pseudocapacitance in the microporous carbon/ polyaniline composite in addition to the electrical double layer capacitance of pristine microporous carbon. The composite material shows the capacitance retention percentage over 80% after 1000 cycles implying a promise for novel supercapacitors with long-lasting ultra-high capacitance and power density.
      PubDate: 2022-02-01
       
  • Photoelectrochemical and Electrocatalytic Behaviors of TiO2 Nanostructures
           and TiO2−Au Nanocomposites: Effect of Synthesis Conditions

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      Abstract: Mesoporous TiO2 nanostructures and TiO2−Au nanocomposites with stabilized Au nanoparticles are synthesized by the template sol-gel process. The effects of synthesis conditions on the particle size, electronic structure, morphology, composition, and texture of prepared materials are determined. TiO2- and TiO2−Au-based electrodes are shown to be photoactive in the wavelength range of 250–412 nm and in the methylene blue (MB) photodecomposition and feature high catalytic activity in an oxygen electroreduction reaction. The presence of hydroxyl and carboxylate groups in the amorphous phase is the key factor affecting the photosensitivity of our TiO2 nanostructures and contributing to enhancement of their photoactivity in the MB photodecomposition reaction. Due to their catalytic activity and consistent performance in the oxygen electroreduction reaction, the TiO2 nanostructures and TiO2−Au nanocomposites can be considered as promising materials for use in electrochemical oxygen sensors with application to aqueous solutions.
      PubDate: 2022-02-01
       
  • Gas-Vapor Cavity Effect on Pressure Field in Deformable Wall Closed
           Discharge Chamber

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      Abstract: The pressure field in the limited volume discharge chambers with deformable walls markedly affects the technological process efficiency of sheet alloys’ deformation; therefore, its determination is of great importance. Resulting from the electrical discharge in liquid, which fills the discharge chamber, a cavity is formed in the latter with a higher compressibility than that of the liquid in the chamber. Its pulsations create the field of pressure in the discharge chamber. At present, the role of the gas-vapor cavity is studied slightly as to the formation of the field of pressure in the discharge chamber with a deformable wall. Its definition is the aim of this work. The research is based on the earlier developed mathematical model of the electric discharge in water, which is supplemented in this work with correlations that significantly enhance the calculation precision of the discharge channel resistance and the energy released in it. It was determined that the pulsations of the gas-vapor cavity ensure pressure oscillations in it in a counter-phase with an average pressure in the liquid. They decay slowly in the discharge chamber with rigid walls, whereas the presence of the deformable wall makes the decay of the pressure oscillation to be rapid. In the mathematical model developed earlier, a change in the plasma optical transparency and its substantial effect on the pressure in the cavity as well as the pressure field in the liquid were taken into account.
      PubDate: 2022-02-01
       
  • Comparative Study of Structural, Optical, and Morphological Properties of
           SILAR and Electrodeposition Grown ZnO and Al:ZnO Nanostructures

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      Abstract: ZnO nanorods and Al:ZnO nanosheets have been successfully synthesized via two chemical methods: electrodeposition and successive ionic layer adsorption and reaction (SILAR). The present study reports their structural, morphological, and optical properties. All samples annealed at 350°C were polycrystalline, with a hexagonal wurtzite structure. The morphological analyses show two different nanostructures of hexagonal nanorods and hexagonal nanosheets which are attributed to pure ZnO and Al:ZnO, respectively. Moreover, the average size and the vertical orientation of the obtained nanorods and nanosheets depend on the used synthesis methods. Furthermore, the UV-Vis analyses performed on the obtained films revealed transmittance over 70% in the UV-Vis region. In fact, the electrodeposition method allows depositing a ZnO film with a transparence higher than 13% compared to that obtained via SILAR method. The obtained band gap values are approximately 3.25 and 3.28 eV for the ZnO synthesized by electrodeposition and SILAR, respectively.
      PubDate: 2022-02-01
       
 
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