首页期刊导航|材料科学技术（英文版）
期刊信息/Journal information
材料科学技术（英文版）
材料科学技术（英文版）

胡壮麟

月刊

1005-0302

jmst@imr.ac.cn

024-83978208

110016

沈阳市沈河区文化路72号

材料科学技术（英文版）/Journal Journal of Materials Science & TechnologyCSCDCSTPCD北大核心EISCI
查看更多>>本刊简称《JMST》，（ISSN 1005-0302，CN 21-1315/TG）。1985年创刊。是中国科协主管，中国金属学会，中国材料研究学会和中国科学院金属研究所联合主办的国际性英文期刊，以“加强国际交流，扩大学术影响，服务经济建设”为办刊宗旨，刊登世界各国的具有创新性和较高学术水平的原始性论文，并设有物约综述、快报、简讯及国内外材料界杰出学者简介等栏目，内容包括金属材料、无机非金属材料、复合材料及有机高分子材料等。
正式出版
收录年代

    ZnO/nitrogen-doped carbon nanocomplex with controlled morphology for highly efficient electromagnetic wave absorption

    Zhen YuRui ZhouMingwei MaRunqiu Zhu...
    206-214页
    查看更多>>摘要：In this work,zeolitic imidazolate framework-8(ZIF-8)with yolk-shell and hollow structures were pre-pared by a convenient chemical etching method.A subsequent pyrolysis of ZIF-8 enabled one to pro-duce ZnO/nitrogen-doped carbon nanocomplexes with original ZIF-8 morphology,where hollow struc-ture showed superior electromagnetic wave absorption capacity and was responsible for matching the impedance of free space.The minimum reflection coefficients of hollow ZnO/nitrogen-doped carbon nanocomplexes were-51.2 dB(700℃)and-52.4 dB(800℃),respectively,whereas the effective ab-sorption band width was as large as 4 GHz and the content of pyrolyzed hollow ZIF-8 was 15 wt％,which was inferior to the level among similar electromagnetic wave(EMW)absorption materials.The conve-nient and facile strategy paves the way toward designing hierarchical structures for highly efficient and light-weight electromagnetic wave absorbers.
      原文链接:
    • 维普
    • 万方数据

    Is hardness constant in covalent materials?

    Guangpeng SunXing FengXue WuSitong Zhang...
    215-221页
    查看更多>>摘要：It has long been commonly believed that the hardness of covalent materials is related only to chemical bonds,leading to a constant covalent material hardness.Here,we systematically investigated the hard-ness of Cubic-diamond(3C-diamond)and Hexagonal-diamond(2H-diamond)structures using the ordered structure of functional units(OSFU)strategy.We found that although chemical bonds are the decisive factor in determining the hardness of covalent materials,the effects of crystal lattice,dislocation density,and grain size and orientation are also very important.These are all internal factors that determine the hardness of a material.In addition,external factors such as temperature and strain rate can also influ-ence the hardness of a material to some extent by affecting the critical resolved shear stresses(CRSSs)of dislocation motion.In this work,we argue that the hardness of covalent materials is determined by a combination of internal and external factors,where internal factors such as the chemical bonds,crystal lattice,defects,and grains intrinsically determine the hardness of a material;likewise,external factors such as temperature and strain extrinsically affect the hardness of a material.Therefore,the hardness of covalent materials is not constant.
      原文链接:
    • 万方数据

    Enhanced photocatalytic degradation and H2 evolution performance of N-CDs/S-C3N4 S-scheme heterojunction constructed by π-π conjugate self-assembly

    Xibao LiQiuning LuoLu HanFang Deng...
    222-232页
    查看更多>>摘要：Constructing heterojunction between two semiconductors with matched energy band structure is an ef-fective modification method to obtain excellent photocatalysts.The experimental scheme adopts a simple solvent method to self-assemble nitrogen doped carbon dots(N-CDs)on the surface of sulfur doped car-bon nitride(S-C3N4)semiconductor through π-π conjugate interaction.Based on this,a novel 0D/2D S-scheme heterojunction N-CDs/S-C3N4 hybrid was successfully prepared.The degradation kinetic constants of N-CDs/S-C3N4 for rhodamine B(RhB)and p-nitrophenol(PNP)reached 0.23522 and 0.01342 min-1,re-spectively,which were 2.72 and 2.65 times that of S-C3N4.The highest photocatalytic hydrogen evolution rate was observed under the simulated sunlight irradiation,which was 2.30 times that of S-C3N4.The improvement of photocatalytic performance was mainly based on the formation of the S-scheme hetero-junction between S-C3N4 and N-CDs.The effects of internal electric field,π-π conjugate interaction and band bending promoted the photogenerated h+and e-with low redox ability to recombine and retained the beneficial h+and e-with strong redox ability,which contributed to the production of more active species of h+and·02-,therefore the photocatalytic degradation and hydrogen evolution performance were significantly enhanced.
      原文链接:
    • 万方数据

    MXene-derived TiO2 nanosheets decorated with Ag nanoparticles for highly sensitive detection of ammonia at room temperature

    Jie WenZihao SongJiabao DingFeihong Wang...
    233-239页
    查看更多>>摘要：Due to their large surface-to-volume ratio and low electronic noise,two-dimensional transition metal car-bides(Ti3C2Tx MXene)and their derived transition metal oxides have demonstrated significant potential for use in high-precision gas sensing.However,the construction of high-sensitivity Ti3C2Tx MXene-based gas sensors operated at room temperature(RT)is still a major challenge.Herein,we demonstrate a sen-sitive nanocomposite prepared by uniformly anchoring silver nanoparticles(AgNPs)on Ti3C2Tx MXene-derived transition metal oxide(TiO2)nanosheets for high-sensitivity NH3 detection.AgNPs can not only serve as spacers to effectively prevent the restacking of MXene-derived TiO2 nanosheets and ensure an effective transmission highway for target gas molecules,but also enhance the sensitivity of the sensor through chemical and electronic sensitization.By integrating the unique merits of the individual compo-nents and the synergistic effects of the composites,the optimized Ag@TiO2 nanocomposite-based sensors revealed an extraordinary response value of 71.8 to 50 ppm NH3 at RT with a detection limit as low as 5 ppm.In addition,the Ag@TiO2 NH3 sensor also exhibits excellent selectivity and outstanding repeatabil-ity.This strategy provides an avenue for the development of MXene derivatives for advanced gas sensors.
      原文链接:
    • 万方数据

    Oxygen vacancies induced narrow band gap of BiOCl for efficient visible-light catalytic performance from double radicals

    Changyan ChenTing JiangJianhua HouTingting Zhang...
    240-248页
    查看更多>>摘要：In this work,a high-efficiency photocatalytic BiOCl material with a visible light absorption range was successfully prepared by one-pot molecular self-assembly and particle recrystallization method at room temperature.In the process of crystal growth,tartaric acid,as a structure control agent,gradually trans-forms the stacked two-dimensional nano-sheet-like BiOCl into a hierarchical structure composed of petal-like nano-sheets through hydrogen bonding.Besides,the acid etching of organic carboxylic acid on the crystal surface increases the number of micropores and mesopores,thereby the reaction interface.The thiourea(TU)molecules adsorbed on the BiOCl surface with a strong electronic effect introduce oxygen vacancies(OVs)under the condition of low oxygen content.The synergistic effect of hierarchical structure and OVs reduces the recombination of photogenerated carriers,but absorbs more O2 and OH-to generate a large number of superoxide radicals(-O2-)and hydroxyl radicals(.OH)effectively.The photocatalytic performance of the synthesized BiOCl material has been significantly improved,and it can effectively de-grade 94.15％of rhodamine B(RhB)within 20 min.Furthermore,90.95％of tetracycline(TC),93.76％of ciprofloxacin(CIP),and 85.53％of methyl orange(MO)can be removed in 80 min.Therefore,our work provides an effective method for preparing BiOCl with visible light catalytic activity,which,of course,can be used to treat and repair actual environmental problems under mild conditions.
      原文链接:
    • 维普
    • 万方数据

    Revealing the residual stress distribution in laser welded Eurofer97 steel by neutron diffraction and Bragg edge imaging

    Bin ZhuNathanael LeungWinfried KockelmannSaurabh Kabra...
    249-260页
    查看更多>>摘要：Eurofer97 steel is a primary structural material for applications in fusion reactors.Laser welding is a promising technique to join Eurofer97 plasma-facing components and overcome remote handling and maintenance challenges.The interaction of the induced residual stress and the heterogeneous microstruc-ture degrades the mechanical performance of such fusion components.The present study investigates the distribution of residual stress in as-welded and post-heat treated Eurofer97 joints.The mechanis-tic connections between microstructure,material properties,and residual stress are also studied.Neu-tron diffraction is used to study the through-thickness residual stress distribution in three directions,and neutron Bragg edge imaging(NBEI)is applied to study the residual strain in high spatial resolution.The microstructures and micro-hardness are characterised by electron backscatter diffraction and nanoin-dentation,respectively.The M-shaped residual stress distribution through the thickness of the as-welded weldment is observed by neutron diffraction line scans over a region of 1.41×10 mm2.These profiles are cross-validated over a larger area(-56×40 mm2)with the higher spatial resolution by NBEI.The micro-hardness value in the fusion zone of the as-welded sample almost doubles from 2.75±0.09 GPa to 5.06±0.29 GPa due to a combination of residual stress and cooling-induced martensite.Conventional post weld heat treatment(PWHT)is shown to release～90％of the residual stress but not fully restore the microstructure.By comparing its hardness with that of stress-free samples,it is found that the mi-crostructure is the primary contribution to the hardening.This study provides insight into the prediction of structural integrity for critical structural components of fusion reactors.
      原文链接:
    • 维普
    • 万方数据