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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。
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    Nanostructured amorphous Fe29Co27Ni23Si9B12 high-entropy-alloy: an efficient electrocatalyst for oxygen evolution reaction

    Hongyan WangRan WeiXiumin LiXuli Ma...
    191-198页
    查看更多>>摘要：Proximal configuration of dissimilar metal atoms in amorphous high-entropy-alloys (HEAs) always result in interatomic d-band ligand effect,dense defect distribution,coordinatively unsaturated sites,high potential energy,and loose atom bonding.Herein,nanostructured amorphous Fe29Co27Ni23Si9B12 HEA ribbon is fabricated via a melt spinning method combined with electrochemical corrosion etching process,which is applied as the potential oxygen evolution reaction electrocatalyst.It is found that there are micro/nano pits on the surface of etched amorphous Fe29Co27Ni23Si9B12 ribbons.Various elements of HEAs bond with each other to form a highly disordered configuration,which could result in an optimized bonding energy and enhanced intrinsic catalytic activity.The electrocatalysis activity measurements indicate that the amorphous HEA endows a much higher activity than the crystalline one,which is further improved by the electrochemical etching treatment.Especially,the HEA ribbon etched for 3 h requires a low overpotential of 230 mV to afford 10 mA cm-2 current density.In addition,density functional theory calculations demonstrate that the amorphous structure can weaken the interaction between the surface of Fe29Co27Ni23Si9B12 alloy and the intermediates,leading to an optimized adsorption Gibbs free energy.
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    Composition-dependent dynamic precipitation and grain refinement in Al-Si system under high-pressure torsion

    Shenbao JinZhenjiao LuoXianghai AnXiaozhou Liao...
    199-208页
    查看更多>>摘要：Understanding composition effects is crucial for alloy design and development.To date,there is a lack of research comprehensively addressing the effect of alloy composition on dynamic precipitation,segregation and grain refinement under severe-plastic-deformation processing.This research investigates Al-xSi alloys with x =0.1,0.5 and 1.0 at.％ Si processed by high pressure torsion (HPT) at room temperature by using transmission electron microscopy,transmission Kikuchi diffraction and atom probe tomography.The alloys exhibit interesting composition-dependent grain refinement and fast dynamic decomposition under HPT processing.Si atoms segregate at dislocations and Si precipitates form at grain boundaries (GBs) depending on the Si content of the alloys.The growth of Si precipitates consumes most Si atoms segregating at GBs,hence the size and distribution of the Si precipitates become predominant factors in controlling the grain size of the decomposed Al-Si alloys after HPT processing.The hardness of the Al-Si alloys is well correlated with a combination of grain-refinement strengthening and the decomposition-induced softening.
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    Intrinsic high thermal conductive liquid crystal epoxy film simultaneously combining with excellent intrinsic self-healing performance

    Xutong YangXiao ZhongJunliang ZhangJunwei Gu...
    209-215页
    查看更多>>摘要：One kind of side chain liquid crystal epoxy (S-LCE) based on biphenyl mesomorphic unit is synthesized from 2,2-bis(hydroxymethyl)propionic acid,4-phenylphenol,and epichlorohydrin.And the intrinsic thermal conductive liquid crystal epoxy film (LCEF) simultaneously combining with intrinsic self-healing performance is then prepared via thiol-epoxide nucleophilic ring-opening reaction and coating method.1 H NMR and FTIR show that S-LCE and LCEF have been successfully prepared.S-LCE presents nematic liquid crystal from room temperature to 160 ℃.LCEF maintains nematic liquid crystal performance and shows highly intrinsic thermal conductivity & excellent self-healing performance.Thermal conductivity coefficient (λ) values in vertical direction (λ⊥) and parallel direction (λ‖) of LCEF are 0.33 and 1.25 W/mK,respectively,much higher than that of general bisphenol A epoxy resin (E-51,λ⊥ of 0.19 W/mK and λ‖ of 0.65 W/mK).Tensile strength of LCEF is 10.6 MPa,which can maintain at 90.6 ％ and 61.3 ％ after one and four cycles of self-healing behavior,respectively.in addition,LCEF presents a wide service temperature range (-9.8-251 ℃) and good thermal stability (THRI of 148.5 ℃).Simultaneously,LCEF has good transparency,flexibility,and tailorability,expected to be utilized in the fields of flexible electronic devices and intelligent structures.
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    Solution-processed, flexible and broadband photodetector based on CsPbBr3/PbSe quantum dot heterostructures

    Jinming HuShengyi YangZhenheng ZhangHailong Li...
    216-226页
    查看更多>>摘要：Due to their promising applications in foldable displays,optical communication equipment and environmental monitoring systems,flexible and broadband optoelectronic devices have gained extensive attention in recent years.Here,a flexible and broadband photodetector based on CsPbBr3/PbSe quantum dot (QD) heterostructures is firstly presented.The integrated QD heterostructures possess consecutive detection range from ultraviolet (UV) to long-wavelength infrared (LW-IR) regions with efficient light absorption and chemical stability,in comparison with the pristine PbSe QDs.Systematic material characterizations reveal the improved exciton dissociation,carrier transport and carrier lifetime of the QD heterostructures.Flexible photodetector Ag/CsPbBr3/PbSe/Ag demonstrate a high responsivity of 7.17 A/W with a specific detectivity of 8.97 × 1012 Jones under 25 μW/cm2 365 nm illumination at 5 V.Furthermore,it could maintain 91.2 ％ (or 94.9 ％) of its initial performance even after bending for thousands of times (or exposing in ambient air for 4 weeks).More importantly,its response time is shortened more than three orders of magnitude as that of pristine PbSe QDs-based photodetectors.Therefore,it provides a feasible and promising method for the next-generation high-performance broadband photodetectors via constructing heterostructures of various QDs.
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    Repassivation behavior of alloy 690TT in simulated primary water at different temperatures

    Ji LiuJianqiu WangZhiming ZhangHui Zheng...
    227-235页
    查看更多>>摘要：The repassivation behavior of Alloy 690TT in simulated primary water at different temperatures was investigated by the rapid scratching electrode technique together with electrochemical measurements.The results showed that the repassivation process had three stages: the initial stage conformed to the place exchange model,the final stage conformed to the high field ion conduction model and in between there was a transition stage.At the initial stage,when the repassivation process of alloys was controlled by the place exchange model,anodic dissolution of substrate was dominated;after the film coverage rate was more than 0.99,the repassivation process of alloys was controlled by high field ion conduction model.Increasing the temperature resulted in a reduction of the repassivation rate and protectiveness of the passive film.The correlations among several mechanisms describing the repassivation behavior of alloys were discussed.
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