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  Subjects -> CHEMISTRY (Total: 845 journals)
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    - CHEMISTRY (595 journals)
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CHEMISTRY (595 journals)                  1 2 3 | Last

Showing 1 - 200 of 735 Journals sorted alphabetically
2D Materials     Hybrid Journal   (Followers: 8)
Accreditation and Quality Assurance: Journal for Quality, Comparability and Reliability in Chemical Measurement     Hybrid Journal   (Followers: 26)
ACS Catalysis     Full-text available via subscription   (Followers: 34)
ACS Chemical Neuroscience     Full-text available via subscription   (Followers: 18)
ACS Combinatorial Science     Full-text available via subscription   (Followers: 23)
ACS Macro Letters     Full-text available via subscription   (Followers: 24)
ACS Medicinal Chemistry Letters     Full-text available via subscription   (Followers: 39)
ACS Nano     Full-text available via subscription   (Followers: 246)
ACS Photonics     Full-text available via subscription   (Followers: 11)
ACS Synthetic Biology     Full-text available via subscription   (Followers: 21)
Acta Chemica Iasi     Open Access   (Followers: 2)
Acta Chimica Sinica     Full-text available via subscription   (Followers: 1)
Acta Chimica Slovaca     Open Access   (Followers: 1)
Acta Chromatographica     Full-text available via subscription   (Followers: 9)
Acta Facultatis Medicae Naissensis     Open Access  
Acta Metallurgica Sinica (English Letters)     Hybrid Journal   (Followers: 5)
Acta Scientifica Naturalis     Open Access   (Followers: 2)
adhäsion KLEBEN & DICHTEN     Hybrid Journal   (Followers: 5)
Adhesion Adhesives & Sealants     Hybrid Journal   (Followers: 8)
Adsorption Science & Technology     Full-text available via subscription   (Followers: 5)
Advanced Functional Materials     Hybrid Journal   (Followers: 51)
Advanced Science Focus     Free   (Followers: 3)
Advances in Chemical Engineering and Science     Open Access   (Followers: 56)
Advances in Chemical Science     Open Access   (Followers: 13)
Advances in Chemistry     Open Access   (Followers: 15)
Advances in Colloid and Interface Science     Full-text available via subscription   (Followers: 18)
Advances in Drug Research     Full-text available via subscription   (Followers: 22)
Advances in Enzyme Research     Open Access   (Followers: 9)
Advances in Fluorine Science     Full-text available via subscription   (Followers: 8)
Advances in Fuel Cells     Full-text available via subscription   (Followers: 16)
Advances in Heterocyclic Chemistry     Full-text available via subscription   (Followers: 9)
Advances in Materials Physics and Chemistry     Open Access   (Followers: 21)
Advances in Nanoparticles     Open Access   (Followers: 15)
Advances in Organometallic Chemistry     Full-text available via subscription   (Followers: 15)
Advances in Polymer Science     Hybrid Journal   (Followers: 41)
Advances in Protein Chemistry     Full-text available via subscription   (Followers: 17)
Advances in Protein Chemistry and Structural Biology     Full-text available via subscription   (Followers: 20)
Advances in Quantum Chemistry     Full-text available via subscription   (Followers: 5)
Advances in Science and Technology     Full-text available via subscription   (Followers: 12)
African Journal of Bacteriology Research     Open Access  
African Journal of Chemical Education     Open Access   (Followers: 2)
African Journal of Pure and Applied Chemistry     Open Access   (Followers: 7)
Agrokémia és Talajtan     Full-text available via subscription   (Followers: 2)
Alkaloids: Chemical and Biological Perspectives     Full-text available via subscription   (Followers: 3)
AMB Express     Open Access   (Followers: 1)
Ambix     Hybrid Journal   (Followers: 3)
American Journal of Biochemistry and Biotechnology     Open Access   (Followers: 67)
American Journal of Biochemistry and Molecular Biology     Open Access   (Followers: 14)
American Journal of Chemistry     Open Access   (Followers: 27)
American Journal of Plant Physiology     Open Access   (Followers: 14)
American Mineralogist     Hybrid Journal   (Followers: 14)
Analyst     Full-text available via subscription   (Followers: 40)
Angewandte Chemie     Hybrid Journal   (Followers: 192)
Angewandte Chemie International Edition     Hybrid Journal   (Followers: 218)
Annales UMCS, Chemia     Open Access   (Followers: 1)
Annals of Clinical Chemistry and Laboratory Medicine     Open Access   (Followers: 4)
Annual Reports in Computational Chemistry     Full-text available via subscription   (Followers: 3)
Annual Reports Section A (Inorganic Chemistry)     Full-text available via subscription   (Followers: 4)
Annual Reports Section B (Organic Chemistry)     Full-text available via subscription   (Followers: 8)
Annual Review of Chemical and Biomolecular Engineering     Full-text available via subscription   (Followers: 12)
Annual Review of Food Science and Technology     Full-text available via subscription   (Followers: 15)
Anti-Infective Agents     Hybrid Journal   (Followers: 3)
Antiviral Chemistry and Chemotherapy     Hybrid Journal  
Applied Organometallic Chemistry     Hybrid Journal   (Followers: 7)
Applied Spectroscopy     Full-text available via subscription   (Followers: 23)
Applied Surface Science     Hybrid Journal   (Followers: 28)
Arabian Journal of Chemistry     Open Access   (Followers: 6)
ARKIVOC     Open Access   (Followers: 2)
Asian Journal of Biochemistry     Open Access   (Followers: 1)
Atomization and Sprays     Full-text available via subscription   (Followers: 4)
Australian Journal of Chemistry     Hybrid Journal   (Followers: 7)
Autophagy     Hybrid Journal   (Followers: 2)
Avances en Quimica     Open Access   (Followers: 1)
Biochemical Pharmacology     Hybrid Journal   (Followers: 10)
Biochemistry     Full-text available via subscription   (Followers: 309)
Biochemistry Insights     Open Access   (Followers: 6)
Biochemistry Research International     Open Access   (Followers: 6)
BioChip Journal     Hybrid Journal  
Bioinorganic Chemistry and Applications     Open Access   (Followers: 9)
Bioinspired Materials     Open Access   (Followers: 5)
Biointerface Research in Applied Chemistry     Open Access   (Followers: 2)
Biointerphases     Open Access   (Followers: 1)
Biology, Medicine, & Natural Product Chemistry     Open Access   (Followers: 1)
Biomacromolecules     Full-text available via subscription   (Followers: 19)
Biomass Conversion and Biorefinery     Partially Free   (Followers: 10)
Biomedical Chromatography     Hybrid Journal   (Followers: 6)
Biomolecular NMR Assignments     Hybrid Journal   (Followers: 3)
BioNanoScience     Partially Free   (Followers: 5)
Bioorganic & Medicinal Chemistry     Hybrid Journal   (Followers: 117)
Bioorganic & Medicinal Chemistry Letters     Hybrid Journal   (Followers: 91)
Bioorganic Chemistry     Hybrid Journal   (Followers: 10)
Biopolymers     Hybrid Journal   (Followers: 18)
Biosensors     Open Access   (Followers: 2)
Biotechnic and Histochemistry     Hybrid Journal   (Followers: 1)
Bitácora Digital     Open Access  
Boletin de la Sociedad Chilena de Quimica     Open Access  
Bulletin of the Chemical Society of Ethiopia     Open Access   (Followers: 2)
Bulletin of the Chemical Society of Japan     Full-text available via subscription   (Followers: 24)
Bulletin of the Korean Chemical Society     Hybrid Journal   (Followers: 1)
C - Journal of Carbon Research     Open Access   (Followers: 3)
Cakra Kimia (Indonesian E-Journal of Applied Chemistry)     Open Access  
Canadian Association of Radiologists Journal     Full-text available via subscription   (Followers: 3)
Canadian Journal of Chemistry     Hybrid Journal   (Followers: 10)
Canadian Mineralogist     Full-text available via subscription   (Followers: 4)
Carbohydrate Research     Hybrid Journal   (Followers: 26)
Carbon     Hybrid Journal   (Followers: 66)
Catalysis for Sustainable Energy     Open Access   (Followers: 7)
Catalysis Reviews: Science and Engineering     Hybrid Journal   (Followers: 8)
Catalysis Science and Technology     Free   (Followers: 7)
Catalysis Surveys from Asia     Hybrid Journal   (Followers: 3)
Catalysts     Open Access   (Followers: 8)
Cellulose     Hybrid Journal   (Followers: 7)
Cereal Chemistry     Full-text available via subscription   (Followers: 4)
ChemBioEng Reviews     Full-text available via subscription   (Followers: 1)
ChemCatChem     Hybrid Journal   (Followers: 8)
Chemical and Engineering News     Free   (Followers: 14)
Chemical Bulletin of Kazakh National University     Open Access  
Chemical Communications     Full-text available via subscription   (Followers: 72)
Chemical Engineering Research and Design     Hybrid Journal   (Followers: 24)
Chemical Research in Chinese Universities     Hybrid Journal   (Followers: 3)
Chemical Research in Toxicology     Full-text available via subscription   (Followers: 20)
Chemical Reviews     Full-text available via subscription   (Followers: 181)
Chemical Science     Open Access   (Followers: 22)
Chemical Technology     Open Access   (Followers: 16)
Chemical Vapor Deposition     Hybrid Journal   (Followers: 5)
Chemical Week     Full-text available via subscription   (Followers: 8)
Chemie in Unserer Zeit     Hybrid Journal   (Followers: 58)
Chemie-Ingenieur-Technik (Cit)     Hybrid Journal   (Followers: 26)
ChemInform     Hybrid Journal   (Followers: 8)
Chemistry & Biodiversity     Hybrid Journal   (Followers: 6)
Chemistry & Biology     Full-text available via subscription   (Followers: 30)
Chemistry & Industry     Hybrid Journal   (Followers: 5)
Chemistry - A European Journal     Hybrid Journal   (Followers: 147)
Chemistry - An Asian Journal     Hybrid Journal   (Followers: 15)
Chemistry and Materials Research     Open Access   (Followers: 20)
Chemistry Central Journal     Open Access   (Followers: 4)
Chemistry Education Research and Practice     Free   (Followers: 5)
Chemistry in Education     Open Access   (Followers: 9)
Chemistry International     Hybrid Journal   (Followers: 2)
Chemistry Letters     Full-text available via subscription   (Followers: 44)
Chemistry of Materials     Full-text available via subscription   (Followers: 250)
Chemistry of Natural Compounds     Hybrid Journal   (Followers: 9)
Chemistry World     Full-text available via subscription   (Followers: 22)
Chemistry-Didactics-Ecology-Metrology     Open Access   (Followers: 1)
ChemistryOpen     Open Access   (Followers: 2)
Chemkon - Chemie Konkret, Forum Fuer Unterricht Und Didaktik     Hybrid Journal  
Chemoecology     Hybrid Journal   (Followers: 4)
Chemometrics and Intelligent Laboratory Systems     Hybrid Journal   (Followers: 15)
Chemosensors     Open Access  
ChemPhysChem     Hybrid Journal   (Followers: 9)
ChemPlusChem     Hybrid Journal   (Followers: 2)
ChemTexts     Hybrid Journal  
CHIMIA International Journal for Chemistry     Full-text available via subscription   (Followers: 2)
Chinese Journal of Chemistry     Hybrid Journal   (Followers: 6)
Chinese Journal of Polymer Science     Hybrid Journal   (Followers: 10)
Chromatographia     Hybrid Journal   (Followers: 24)
Clay Minerals     Full-text available via subscription   (Followers: 10)
Cogent Chemistry     Open Access  
Colloid and Interface Science Communications     Open Access  
Colloid and Polymer Science     Hybrid Journal   (Followers: 10)
Colloids and Surfaces B: Biointerfaces     Hybrid Journal   (Followers: 7)
Combinatorial Chemistry & High Throughput Screening     Hybrid Journal   (Followers: 4)
Combustion Science and Technology     Hybrid Journal   (Followers: 18)
Comments on Inorganic Chemistry: A Journal of Critical Discussion of the Current Literature     Hybrid Journal   (Followers: 2)
Composite Interfaces     Hybrid Journal   (Followers: 6)
Comprehensive Chemical Kinetics     Full-text available via subscription   (Followers: 2)
Comptes Rendus Chimie     Full-text available via subscription  
Comptes Rendus Physique     Full-text available via subscription   (Followers: 1)
Computational and Theoretical Chemistry     Hybrid Journal   (Followers: 9)
Computational Biology and Chemistry     Hybrid Journal   (Followers: 12)
Computational Chemistry     Open Access   (Followers: 2)
Computers & Chemical Engineering     Hybrid Journal   (Followers: 9)
Coordination Chemistry Reviews     Full-text available via subscription   (Followers: 3)
Copernican Letters     Open Access   (Followers: 1)
Critical Reviews in Biochemistry and Molecular Biology     Hybrid Journal   (Followers: 5)
Crystal Structure Theory and Applications     Open Access   (Followers: 4)
CrystEngComm     Full-text available via subscription   (Followers: 13)
Current Catalysis     Hybrid Journal   (Followers: 2)
Current Metabolomics     Hybrid Journal   (Followers: 5)
Current Opinion in Colloid & Interface Science     Hybrid Journal   (Followers: 9)
Current Opinion in Molecular Therapeutics     Full-text available via subscription   (Followers: 17)
Current Research in Chemistry     Open Access   (Followers: 8)
Current Science     Open Access   (Followers: 61)
Dalton Transactions     Full-text available via subscription   (Followers: 23)
Detection     Open Access   (Followers: 2)
Developments in Geochemistry     Full-text available via subscription   (Followers: 2)
Diamond and Related Materials     Hybrid Journal   (Followers: 12)
Dislocations in Solids     Full-text available via subscription  
Doklady Chemistry     Hybrid Journal  
Drying Technology: An International Journal     Hybrid Journal   (Followers: 4)
Eclética Química     Open Access   (Followers: 1)
Ecological Chemistry and Engineering S     Open Access   (Followers: 3)
Ecotoxicology and Environmental Contamination     Open Access  
Educación Química     Open Access   (Followers: 1)
Education for Chemical Engineers     Hybrid Journal   (Followers: 5)
EJNMMI Radiopharmacy and Chemistry     Open Access  
Elements     Full-text available via subscription   (Followers: 3)
Environmental Chemistry     Hybrid Journal   (Followers: 7)
Environmental Chemistry Letters     Hybrid Journal   (Followers: 4)
Environmental Science & Technology Letters     Full-text available via subscription   (Followers: 5)

        1 2 3 | Last

Journal Cover Acta Metallurgica Sinica (English Letters)
  [SJR: 0.525]   [H-I: 18]   [5 followers]  Follow
   Hybrid Journal Hybrid journal (It can contain Open Access articles)
   ISSN (Print) 1006-7191 - ISSN (Online) 2194-1289
   Published by Springer-Verlag Homepage  [2352 journals]
  • Fabrication, Pore Structures and Mechanical Properties of (TiB 2 –Al 2 O
           3 )/NiAl Porous Composites
    • Authors: Jie Wu; Zhao-Tai Yang; Hong-Zhi Cui; Na Wei; Xiao-Jie Song
      Pages: 1145 - 1154
      Abstract: Open-celled porous (TiB2–Al2O3)/NiAl composites were successfully fabricated by using spherical carbamide as space holders via self-propagating high-temperature synthesis (SHS). Effects of 10Al–3B2O3–3TiO2 contents (0–20 wt%) on the pore structures and the quasi-static compressive behaviors of the resultant materials were investigated. The porous (TiB2–Al2O3)/NiAl composites exhibit composite pore structure consisting of homogeneously distributed and interconnected millimeter pores and micropores. The millimeter pores virtually inherit the shape and size of carbamide particles, while the pore size of micropores increases with increasing the 10Al–3B2O3–3TiO2 content. Depending on the volume fraction of the carbamide, the porosity of the porous materials can be easily controlled in a range of 55%–85%. When the porosity is about 72%, the compressive strengths of porous NiAl and porous (TiB2–Al2O3)/NiAl composite with 15% 10Al–3B2O3–3TiO2 in green compact are 19 and 32 MPa, and the corresponding strains are 2.9% and 5.7%, respectively. Furthermore, the quasi-static compressive behavior of porous (TiB2–Al2O3)/NiAl composites can be estimated by Gibson–Ashby model.
      PubDate: 2017-12-01
      DOI: 10.1007/s40195-017-0650-z
      Issue No: Vol. 30, No. 12 (2017)
  • Effect of Milling Tools on the Microstructure and Property of Cu-Based
           Composites Prepared by Mechanical Alloying
    • Authors: Ruo-Shan Lei; Ming-Pu Wang
      Pages: 1155 - 1162
      Abstract: Cu and Nb powders were used as starting materials to produce Cu–Nb and Cu–NbC–WC composites by mechanical alloying. X-ray diffraction, scanning electron microscopy, transmission electron microscopy observations and microhardness measurements have been used to study the effects of milling tools on the phase, microstructure and property of the composites. The results revealed that a single-phase nanocrystalline solid solution was obtained using stainless steel vials and balls (Alloy 1). Nevertheless, Cu–7 wt% Nb powders milled by tungsten carbon vials and balls exhibited an amorphous phase (Alloy 2). The as-milled powders were then vacuum hot-pressing sintered. The microstructure of sintered Alloy 1 consisted of Nb nanoparticles and Cu nanograins. Instead, Alloy 2 showed a microstructure with NbC nanoparticles and WC submicron-sized particles dispersed throughout the Cu matrix. Furthermore, Alloy 2 (~322 HV) had a higher microhardness than Alloy 1 (~302 HV).
      PubDate: 2017-12-01
      DOI: 10.1007/s40195-017-0582-7
      Issue No: Vol. 30, No. 12 (2017)
  • Dynamic Mechanical Behavior and Hypervelocity Impact Performance of an
           Al-Based Nanocrystalline Alloy
    • Authors: Shan-Shan Deng; Gang Wang; Run-Qing Chi; Bao-Jun Pang; Dong-Jun Wang; Jun Shen
      Pages: 1169 - 1176
      Abstract: In a wide strain rate range from 10−5 to 103 s−1, the deformation behavior of an Al-based nanocrystalline alloy was investigated. After fracture, the debris collected was used for statistical analysis, which is expected to reflect the profile of the fracture behavior of the alloy. The energy absorption of alloy at different strain rates was elucidated on account of mass distribution of debris. Based on the parameters obtained by the compression experiment at different strain rates, the numerical simulation experiment was carried out to evaluate the performance of Al-based nanocrystalline alloy as spacecraft shielding. The results suggest that Al-based nanocrystalline alloys have better shield performance than aluminum alloy under the identical areal density at velocity of 1–7 km/s. The better shield performance is attributed to high fracture strength, high hardness and low toughness of Al-based nanocrystalline alloy as compared with those of aluminum alloy.
      PubDate: 2017-12-01
      DOI: 10.1007/s40195-017-0644-x
      Issue No: Vol. 30, No. 12 (2017)
  • Microstructural Evolution and Softening Behavior of Simulated
           Heat-Affected Zone in 2219 Aluminum Alloy
    • Authors: Xin-Jie Di; Hui-Juan Xie; Cui-Xin Chen; Cai-Yan Deng; Dong-Po Wang
      Pages: 1177 - 1184
      Abstract: The effect of peak temperature (T p) at 200, 300, 400, 500 and 550 °C on the microstructural evolution and softening behavior of the simulated heat-affected zone (HAZ) was studied in the 2219-T87 alloy by electron-backscatter diffraction, transmission electron microscopy, X-ray diffraction, micro-hardness and micro-tensile tests. The results showed that the grain size in the HAZs at 200–500 °C was comparable, but the number density of the strengthening precipitates (GP zones/θ′) decreased with increasing T p. At a T p of 550 °C, the grain size significantly decreased and the distribution of the misorientation angles corresponded to the MacKenzie distribution. The GP zones/θ′ phase coarsened and translated into θ phases at T p values in the range of 200–400 °C. Increasing the T p to 500 °C and above, some θ′ phases translated into θ phases and others dissolved into the α-Al matrix which led to an increase in the solid solution strengthening. The reduction of the number density of the GP zones/θ′ was responsible for the softening behavior.
      PubDate: 2017-12-01
      DOI: 10.1007/s40195-017-0586-3
      Issue No: Vol. 30, No. 12 (2017)
  • Microstructure Evolution and Growth Orientation of Directionally
           Solidified Mg–4 wt% Zn Alloy with Different Growth Rates
    • Authors: Hong-Min Jia; Xiao-Hui Feng; Yuan-Sheng Yang
      Pages: 1185 - 1191
      Abstract: The microstructure evolution and growth orientation of directionally solidified Mg–4 wt% Zn alloy in the growth rate range from 20 to 200 μm/s were investigated. A typical cellular structure was observed with a growth rate of 20 μm/s, and the cellular spacing was 115 μm. When the growth rate increased to 60 μm/s, cellular structure with some developed perturbations was obtained and the cellular spacing was 145 μm, suggesting that the cell-to-dendrite transition happened at the growth rate lower than 60 μm/s. As the growth rate further increased, the microstructure was dendritic and the primary dendritic arm spacing decreased. The relationship between the primary dendritic arm spacings and the growth rates was in good agreement with Trivedi model during dendritic growth. Besides, X-ray diffraction and transmission electron microscopy analyses showed that the growth direction of directionally solidified Mg–4 wt% Zn alloy was \(\left\langle {11\bar{2}0} \right\rangle\) lay in \(\left\{ {0002} \right\}\) crystal plane, and the preferred orientation was explained with the lattice vibration model for one-dimensional monatomic chain.
      PubDate: 2017-12-01
      DOI: 10.1007/s40195-017-0630-3
      Issue No: Vol. 30, No. 12 (2017)
  • The Intrinsic Relationship Between Microstructure Evolution and Thermal
           Fatigue Behavior of a Single-Crystal Cobalt-Base Superalloy
    • Authors: Wei-Min Gui; Hong-Yu Zhang; Min Yang; Tao Jin; Xiao-Feng Sun; Qi Zheng
      Pages: 1192 - 1200
      Abstract: The intrinsic relationship between the microstructure evolution and thermal fatigue behavior of a single-crystal cobalt-base superalloy has been investigated. The thermal fatigue tests are performed cyclically between room temperature and 1050 °C using V-notch plate specimens. Three states of thermal fatigue specimens are selected: the as-cast, solutionized as well as aged states. The solution treatment is carried out at 1260 °C for 24 h, which results in the dissolution of most of interdendritic continuous primary carbides. The subsequent aging treatment is carried out at 1100 °C for 100 h after solution treatment, resulting in the precipitation of a profusion of chain- and point-like M 23C6 carbides in the matrix. The results indicate that the heat treatment can improve the thermal fatigue properties of the alloy and the effect of the solution treatment is more prominent than that of the aging treatment. The coarse and continuously distributed primary carbides in the as-cast state are changed into small and discontinuous distribution by heat treatment, which is the dominant factor in the improvement of thermal fatigue property. Additionally, the effect of oxidation behavior during thermal fatigue test on the thermal fatigue behavior is also studied.
      PubDate: 2017-12-01
      DOI: 10.1007/s40195-017-0646-8
      Issue No: Vol. 30, No. 12 (2017)
  • Fabrication and Significant Photoelectrochemical Activity of Titania
           Nanotubes Modified with Thin Indium Tin Oxide Film
    • Authors: Katarzyna Siuzdak; Mariusz Szkoda; Jakub Karczewski; Jacek Ryl; Kazimierz Darowicki; Katarzyna Grochowska
      Pages: 1210 - 1220
      Abstract: Ordered titanium dioxide nanotubes (TiO2NTs) modified with indium tin oxide (ITO) films were obtained via magnetron sputtering, in which ITO plate was used as a target, onto the as-anodized titania support followed by the calcination process. The morphology of fabricated material with deposited oxide was investigated using scanning electron microscopy. Raman and UV–Vis spectroscopies were utilized to characterize crystalline phase and optical properties of prepared samples, whereas X-ray photoelectron spectroscopy allowed determining the binding energy of present elements. In the case of titanium, three various oxidation states were identified and also the presence of indium and tin was confirmed. The electrochemical test carried out when the sample was exposed to light allows for selection of the most photoactive material. The highest photocurrent was registered when only 5-nm ITO layer was sputtered, and it equals 256 and 133 µA cm−2 for the electrode material immersed in 0.5 M KOH and K2SO4 electrolytes, respectively, that is accordingly 3.5 and 4.4 times higher than the one observed for pristine titania. Furthermore, ITO-modified titania exhibits excellent photostability upon prolonged illumination that is of key importance for possible application in light-driven processes.
      PubDate: 2017-12-01
      DOI: 10.1007/s40195-017-0653-9
      Issue No: Vol. 30, No. 12 (2017)
  • Influence of Al Content on the Microstructure and Properties of the CrAlN
           Coatings Deposited by Arc Ion Plating
    • Authors: Qi-Xiang Fan; Jiao-Jiao Zhang; Zheng-Huan Wu; Yan-Mei Liu; Tao Zhang; Bing Yan; Tie-Gang Wang
      Pages: 1221 - 1230
      Abstract: Four CrAlN coatings with various Al content were prepared by arc ion plating technology under different target currents. The effect of the Al content on the microstructure, chemical compositions, element chemical bonding states and mechanical properties of the CrAlN coatings was analyzed. X-ray diffraction results show that the primary phase of the CrAlN coating is fcc-(Al, Cr)N when the Al content is about 44.02 at.%. However, when the Al content increases to about 53.34 at.%, hcp-AlN phase emerges in the coating. And the hcp-AlN phase becomes the main phase in the CrAlN coating with Al content of about 69.55 at.%. Cross-sectional images show that all the four coatings possess dense structures and the deposition rate of Al atom is higher than that of Cr atom. The hardness of the CrAlN coating with Al content about 44.02 at.% is the largest (3149.72 HV) due to the solid solution hardening effect of the Al element. When the hcp-AlN phase is generated in the CrAlN coating, the hardness declines. The tribological experiment shows that the wear resistance of the CrAlN coating decreases gradually with increasing Al content when sliding against 100Cr6 steel ball.
      PubDate: 2017-12-01
      DOI: 10.1007/s40195-017-0656-6
      Issue No: Vol. 30, No. 12 (2017)
  • Microstructure and Optical Properties of Ti 54.5 Ni 45.5 Nanocrystalline
           Thin Film
    • Authors: Xin Zhang; Jie-He Sui; Yong-Chao Lei; Wei Cai
      Pages: 1231 - 1235
      Abstract: Nanocrystalline Ti54.5Ni45.5 thin film was prepared by magnetron sputtering followed by rapid thermal annealing. The film displayed martensite structure and (001) compound twin substructure, and the transformation temperatures M s and A s are 313 and 365 K, respectively. The reflectivity for the wavelength from 200 to 800 nm at 298 and 393 K was investigated, and the results showed that the optical reflectivity contrast between martensite and austensite at 780, 650, 514 and 405 nm was 105.64, 170.83, 112.22 and 149.92%, respectively, which were larger than those of other reported optical recording materials.
      PubDate: 2017-12-01
      DOI: 10.1007/s40195-017-0606-3
      Issue No: Vol. 30, No. 12 (2017)
  • Influence of Aspect Ratio on Giant Magnetoimpedance Effect for Fe 67 Co 18
           Si 11 B 4 Amorphous Ribbons
    • Authors: Yan-Hong Ding; Ke Xue; Wei-Yan Wang; Xu Ma
      Pages: 1236 - 1242
      Abstract: The effect of sample geometry aspect ratio (l/w) on the giant magnetoimpedance (GMI) in Fe67Co18Si11B4 amorphous ribbons was investigated systematically. The GMI profiles were measured as a function of the external magnetic field at different frequencies up to 110 MHz. The results show that there exists a critical aspect ratio ((l/w)0 = 5.4) below which the maximum GMI effect and sensitivity η decrease with decreasing l/w and above which the maximum GMI effect keeps almost constant and η decreases with increasing l/w. The observed dependence on aspect ratio as (l/w) < (l/w)0 is correlated with the magnetization process: Complex domain structures emerged near the ribbon ends to decrease the magnetostatic energy, modify the transverse permeability and consequently GMI response. Contributions from transverse permeability and resistance may dominantly determine the change of GMI effect as (l/w) > (l/w)0.
      PubDate: 2017-12-01
      DOI: 10.1007/s40195-017-0617-0
      Issue No: Vol. 30, No. 12 (2017)
  • Performance of Ag 2 O/Ag Electrode as Cathodic Electron Acceptor in
           Microbial Fuel Cell
    • Authors: Hong-Yan Dai; Hui-Min Yang; Xuan Jian; Xian Liu; Zhen-Hai Liang
      Pages: 1243 - 1248
      Abstract: An Ag2O/Ag electrode was prepared through the electrochemical oxidation of sterling silver. This electrode was used as a cathodic electron acceptor in a microbial fuel cell (MFC). The Ag2O/Ag electrode was characterized by scanning electron microscopy, X-ray powder diffraction and linear sweep voltammetry. The maximum voltage output of the MFC with the Ag2O/Ag cathode was maintained at between 0.47 and 0.5 V in 100 cycles, indicating the good regenerative capacity of the Ag2O/Ag electrode. The overpotential loss for silver oxide was 0.021–0.006 V, and the maximum power output, open circuit potential and short circuit current of the MFC were 1.796 W m−3, 0.559 V and 9.3375 A m−3, respectively. The energy required for electrochemical reoxidation ranged from 40% to 55% of the energy produced by the MFC. Results indicated that the Ag2O/Ag electrode could be used as a cathodic electron acceptor in MFCs with excellent stability.
      PubDate: 2017-12-01
      DOI: 10.1007/s40195-017-0616-1
      Issue No: Vol. 30, No. 12 (2017)
  • Enhancement of Photocatalytic and Antibacterial Activities of ZnO:Ag
           Nanopowders Through the Addition of Bamboo Charcoal: An Efficient Natural
    • Authors: K. Nithiyadevi; K. Ravichandran
      Pages: 1249 - 1256
      Abstract: This research article explains the removal of methylene blue (MB) and malachite green (MG) from aqueous solution using adsorption/photodegradation activity of ZnO:Ag/bamboo charcoal (BC) nanocomposite. In addition, the antibacterial studies of the prepared samples were tested against Staphylococcus aureus (S. aureus) Gram-positive and Escherichia coli (E. coli) Gram-negative bacteria by the well diffusion method. The ZnO:Ag/BC nanocomposite exhibits superior photocatalytic activity compared with ZnO:Ag. Remarkable degradation efficiencies of 93.95% (MB) and 95.75% (MG) were recorded for ZnO:Ag/BC nanocomposite after 45 min. The degradation process follows a pseudo-first-order kinetics. The rate constant of ZnO:Ag/BC nanocomposite is two times greater than that of pristine ZnO nanopowder for the degradation of MB dye, while for MG dye degradation, it is three times. It is found that the ZnO:Ag/BC nanocomposite shows a higher rate of dye removal due to excellent adsorbing properties of bamboo charcoal (BC). The ZnO:Ag/BC nanocomposite showed better antibacterial properties compared to ZnO:Ag. In this study, the samples were prepared using a simple and low-cost soft chemical route and they were characterized by optical, structural, surface morphological, antibacterial and photocatalytic properties. These characterization studies substantiate the discussions on the photocatalytic and antibacterial activities of the synthesized samples.
      PubDate: 2017-12-01
      DOI: 10.1007/s40195-017-0618-z
      Issue No: Vol. 30, No. 12 (2017)
  • Effect of Heat Treatment on Microstructure and Mechanical Properties of
           Quenching and Partitioning Steel
    • Authors: Shao-Heng Sun; Ai-Min Zhao; Ran Ding; Xiao-Gang Li
      Abstract: In order to investigate the effect of microstructural characterization on the mechanical properties and retained austenite stability, a different type of quenching and partitioning steel (I-Q&P) through intercritical annealing before the quenching and partitioning process was designed, which can realize lamellar intercritical microstructure compared to the conventional quenching and partitioning (Q&P) process. The morphology of ferrite and martensite/retained austenite is lamellar in the I-Q&P steel while it is equiaxed after being heat-treated by conventional Q&P process. The I-Q&P steel is proved to have better formability and mechanical properties than conventional Q&P steel, which is due to the higher-volume fraction of retained austenite in the I-Q&P steel and confirmed by electron backscattering diffraction patterns and X-ray diffraction. Furthermore, the stability of retained austenite in I-Q&P steel is also higher than that in conventional Q&P steel, which is investigated by tensile tests and differential scanning calorimetry.
      PubDate: 2017-11-13
      DOI: 10.1007/s40195-017-0667-3
  • Influence of Initial Microstructure on the Strengthening Effect of
           Extruded Mg–8Sn–4Zn–2Al Alloys
    • Authors: Yang Bai; Wei-Li Cheng; Shi-Chao Ma; Jun Zhang; Chen Guo; Yao Zhang
      Abstract: The Mg–8Sn–4Zn–2Al (TZA842, in wt%) alloys with different initial microstructure (as-cast-AC and homogenization treatment-HT) subjected to hot extrusion. Also, the strengthening responses to AC and HT for the extruded TZA842 alloys were reported. The results revealed that the alloy subjected to HT shows finer grain size, more homogenous microstructure and weaker basal texture than those of counterpart subjected to AC. In addition, compared with TZA842-AC alloy, precipitates were finer and uniformly dispersed in TZA842-HT owing to the utilization of HT. Moreover, the TZA842-HT alloy showed higher yield strength of 200 MPa, ultimate tensile strength of 290 MPa and elongation (EL) of 17.9% than those of TZA842-AC, which was mainly attributed to the combined effects of grain boundary strengthening, precipitation strengthening, solid solution strengthening and weak texture. Strengthening mechanism for both alloys was discussed in detail.
      PubDate: 2017-11-09
      DOI: 10.1007/s40195-017-0673-5
  • Influence of Processing Parameters on Microstructural Evolution and
           Tensile Properties for 7075 Al Alloy Prepared by an ECAP-Based SIMA
    • Authors: Jin-Long Fu; Hong-Jun Jiang; Kai-Kun Wang
      Abstract: A modified strain-induced melt activation (SIMA) process consisting of homogenization, equal-channel angular pressing (ECAP) and subsequent heating to the semisolid temperatures was introduced to prepare the 7075 aluminum alloy with superior thixotropic behaviors. The effects of both the homogenization and the number of ECAP passes, as well as the isothermal temperatures on the microstructural evolution, were investigated. The results indicate that ideal microstructure wherein fine and globular solid grains surrounded by uniform liquid films can be achieved through ECAP deformation–recrystallization mechanism. Increasing the number of ECAP passes accelerates the recrystallization of strained grains, thus reducing the average grain size and improving the grain sphericity. Moreover, higher holding temperatures and prolonged soaking time can improve the growth of the solid grains. Two main coarsening mechanisms, viz. coalescence and Ostwald ripening, contribute to the growth of the solid grains simultaneously and independently. The tensile strength of the 7075 alloys after four-pass ECAP-based SIMA and T6 heat treatment is relatively lower than the as-received billet, while the elongation of SIMA processed samples is much higher than that of as-received ones. Increasing the number of ECAP passes improves the tensile strength for alloys with and without T6 treatment due to the fine grain strengthening mechanism.
      PubDate: 2017-11-09
      DOI: 10.1007/s40195-017-0672-6
  • Gamma-phase influence on shape memory properties in Ni-Mn-Co-Ga-Gd
           high-temperature shape memory alloys
    • Authors: Wei Zhang; Xin Zhang; Qian Wang; Qing-Suo Liu
      Abstract: The effect of γ-phase on two-way shape memory effect (TWSME) of polycrystalline Ni56Mn25-x Co x Ga18.9Gd0.1 alloys was investigated. The results show that an appropriate amount of ductile γ-phase significantly enhances the TWSME. The largest TWSME of 1.4% without training is observed in Ni56Mn21Co4Ga18.9Gd0.1 alloy, and this value is increased to 2.0% after thermomechanical training. The as-trained TWSME decays over the first five thermal cycles and then reaches a stable value as the number of cycles further increasing. Only the degradation of 0.2% is observed after 100 thermal cycles. The better TWSME and thermal stability are ascribed to the stable extra stress field formed by the plastically deformed γ-phase.
      PubDate: 2017-11-04
      DOI: 10.1007/s40195-017-0675-3
  • Energy Density Dependence of Bonding Characteristics of Selective
           Laser-Melted Nb–Si-Based Alloy on Titanium Substrate
    • Authors: Yue-Ling Guo; Li-Na Jia; Bin Kong; Yong-Lin Huang; Hu Zhang
      Abstract: Spherical Nb–20Si–24Ti–2Cr–2Al pre-alloyed powders were processed by selective laser melting (SLM) on Ti6Al4V substrates with different energy densities. A series of single tracks and single layers were produced using different processing parameters, including powder size, laser power, scanning speed and hatch distance. Results showed that the pre-alloyed powders ranging from 45 to 75 μm were more applicable to SLM with less balling tendency, in comparison with those between 75 and 180 μm. The increase in linear energy density (LED) resulted in the decrease in contact angle and the increase in the width of single track as well as its penetration depth into the substrate. Smaller hatch distance leaded to a larger remelted part of the former track and a higher volumetric laser energy density. With a thickness of 75.6 μm, an interfacial intermediate layer, enriched in Ti and depleted in Nb, Si, Cr and Al, was formed between the SLM part and the Ti6Al4V substrate. The mechanisms of the elimination of balling phenomenon by employing a higher LED and the interfacial bonding characteristics between Nb–Si-based alloys via SLM and the Ti6Al4V substrate were discussed.
      PubDate: 2017-11-02
      DOI: 10.1007/s40195-017-0670-8
  • Tribological analysis of the surface layer coated by sintered
           serpentine-reinforced composites
    • Authors: Xiao Wang; Jun-Wei Wu; Lu-Hai Zhou; Xi-Cheng Wei; Wu-Rong Wang
      Abstract: In this work, the serpentine powders were sintered to make the serpentine-reinforced Al-matrix composites, and the microstructures of which were characterized by differential scanning calorimetry, thermal gravimetric analyzer, and X-ray diffractometer. Scanning electron microscopy equipped with energy dispersive spectroscopy. Results show that the sintered serpentine powders were deeply absorbed on the worn surface and embedded in the furrows and scratches of the matrix, forming a self-repairing surface layer which reduces the friction coefficient. The surface layer coated by serpentine was compact, dense, and uniform with the friction time prolonged, compensating the worn loss and increasing the matrix mass.
      PubDate: 2017-11-02
      DOI: 10.1007/s40195-017-0674-4
  • Corrosion Behavior of Cupronickel Alloy in Simulated Seawater in the
           Presence of Sulfate-Reducing Bacteria
    • Authors: Yanyan Song; Hongwei Shi; Jun Wang; Fuchun Liu; En-Hou Han; Wei Ke; Ganxin Jie; Jun Wang; Haijun Huang
      Abstract: The corrosion behavior of cupronickel alloy immersed in the simulated seawater in or without the presence of sulfate-reducing bacteria (SRB) was studied. The results of scanning electronic microscopy and electrochemical impedance spectra reveal that corrosion of the sample immersed in the simulated seawater with SRB was more serious than that immersed in the simulated seawater without SRB. The atomic force microscopy images show that after immersion for 15 days, the surface roughness of the sample in the simulated seawater with SRB was higher than that of the sample in the simulated seawater without SRB. The analysis of confocal laser scanning microscopy indicates that the average depth of the pits on the surface of the sample in the simulated seawater with SRB was almost twice deeper than that of the sample in the simulated seawater without SRB.
      PubDate: 2017-10-14
      DOI: 10.1007/s40195-017-0662-8
  • Effect of HIP Treatment on Fatigue Crack Growth Behavior of Ti–6Al–4V
           Alloy Fabricated by Electron Beam Melting
    • Authors: Yan Liu; Jun Zhang; Shu-Jun Li; Wen-Tao Hou; Hao Wang; Qin-Si Xu; Yu-Lin Hao; Rui Yang
      Abstract: The effect of hot isostatic pressing treatment on the fatigue crack growth behavior of Ti–6Al–4V alloy fabricated by electron beam melting was investigated. The results indicate that the fatigue crack growth rate of the HIPed samples is higher than that of the as-fabricated one under certain stress intensity factor (ΔK < 18 MPa m1/2). With further increase in ΔK, the fatigue crack growth rates of the studied two samples become similar. The variation of α lamella thickness and the pore defects distribution have an effect on the fatigue crack growth rates in the studied samples, and the latter plays the dominant role.
      PubDate: 2017-10-13
      DOI: 10.1007/s40195-017-0665-5
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