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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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    Enhancing the tensile properties of laser repairing Ti-6Al-4V alloys:Optimization of strain distribution based on composition fine-turning

    Hengxin ZhangGeng WangSen YangNan Wang...
    1-11页
    查看更多>>摘要：In the context of laser repairing damaged forging titanium(Ti)alloys,a common challenge is the sig-nificant reduction in elongation of the repaired samples compared to that of the substrate.In this work,directed energy deposition(DED)technology was employed to repair the TC4(Ti-6Al-4V)forgings by ma-nipulating the Al and V contents of the repaired zone(RZ).Subsequent evaluation encompassed the mi-crostructure,microhardness.and tensile properties across the laser repair deposition samples(LRDs).The results revealed that despite the LRD TC4-0Ti's strength reaching 97.80％of the substrate,its elongation is only 43.93％of the substrate.Upon appropriately reducing the Al and V contents of RZ,the LRD TC4-5Ti demonstrates a strength of 935.04 MPa and an elongation of 14.59％,achieving 98.70％and 82.38％of the substrate,respectively.As the Al and V contents of RZ are further decreased,the strength of the LRDs gradually diminishes,falling below the forging standards.Utilizing digital image correlation(DIC)technology,the deformation behavior of different zones during the tensile process of these LDRs was in-vestigated.The results indicated a concentration of strain distribution within either RZ or the substrate zone(SZ)of the LRDs during the tensile process,which signifies the mismatch of deformation capacity between these two zones.Consequently,the tensile properties of the LRDs were adversely affected.By judiciously adjusting the Al and V contents of RZ,the abovementioned mismatch phenomenon can be ameliorated,which facilitates a synergistic strain behavior between SZ and RZ during the tensile process,aiding in the homogenization of strain distribution and consequently enhancing the tensile properties of the LRDs.
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    A novel all-organic S-scheme heterojunction with rapid interfacial charges migration for efficient photocatalytic H2 production

    Yajing RenYunfeng LiGuixu PanNing Wang...
    12-20页
    查看更多>>摘要：Poly(triazine imide),as a kind of highly crystalline g-C3N4,exhibits a promising potential for photo-catalytic hydrogen production,however,some drawbacks still limit its photocatalytic performance.The strategy of constructing S-scheme heterojunction with different semiconductor photocatalysts enables the effective separation of photogenerated electrons and holes,and the strong oxidative and reductive properties of the original photocatalysts could be retained,which will significantly improve the photo-catalytic activity.In this work,we synthesized the organic-organic S-scheme heterojunction between PTI and organic small molecule poly(barbituric acid)(PBA)by hydrogen bond self-assembly method,which results in a significant enhancement of photocatalytic H2 production activity.The H2 production rate of the optimum PBA/PTI-2 sample under visible light irradiation is about 0.92 mmol g-1,which is 5.5 times higher than that of PTI and 14.4 times higher than that of PBA.This excellent photocatalytic performance is attributed to the successful construction of S-scheme heterojunction between PTI and PBA,which ef-fectively accelerates carrier transport and spatial segregation by the formation of a built-in electric field and band bending at the interface.In addition,the S-scheme heterojunction could also reserve the maxi-mum redox capability and enhance the light absorption of the prepared photocatalytic system.This work provides a new strategy and understanding for the design and development of organic-organic S-scheme heterojunction photocatalysts.
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    Carbon quantum dots/BiVO4 S-scheme piezo-photocatalysts improved carrier separation for efficient antibiotic removal

    Mingsong LvShihan WangHaifeng Shi
    21-31页
    查看更多>>摘要：Reasonable design of an efficient S-scheme photocatalyst remains an ongoing challenge due to the limita-tion of interfacial charge separation efficiency.Herein,CQDs/BiVO4 S-scheme heterojunction with Bi-O-C bond was synthesized by introducing carbon quantum dots(CQDs)growth on BiVO4 piezo-photocatalyst and absorbed visible light up to 750 nm.Under light+ultrasonic conditions,the reaction rate con-stant(k)of BVO/C-0.10 reached 0.0517 min-1 on tetracycline(TC)degradation,which was 2.24 and 4.04 times higher than those of BiVO4 and CQDs,respectively.The enhanced performance was attributed to the improved efficiency of the photogenerated carrier separation,originating from the combination of piezoelectric effect and S-scheme heterojunction with Bi-O-C bond.The Bi-O-C bond at the CQDs(3-8 nm)and BiVO4 interfaces connected the two semiconductor materials and provided an atomic-level interface channel for carrier migration.The piezoelectric properties of the composites were investigated by piezo-response force microscopy(PFM).Based on Mott-Schottky curves,X-ray photoelectron spec-troscopy(XPS),and scavenging experiments,the possible piezo-photocatalytic mechanism was proposed in combination with the band structures and characteristics of CQDs and BiVO4.This work furnishes unique insights into developing efficient S-scheme piezo-photocatalysts for purifying wastewater.
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    Ultrahigh-strengthened intragranular κ-Al2O3 nanoparticles dispersed Mo composite prepared via SPS sintering of core-shell Mo nanocomposite powder

    Shu-Xin YanMing-Yang LiXiao-Bo HeFu-Fa Wu...
    32-43页
    查看更多>>摘要：Oxide dispersion strengthening(ODS)is an effective method to improve the mechanical properties of Mo-based materials.However,the mechanical properties of traditional ODS-Mo composites are always lim-ited by the coarsening and intergranular distribution of second-phase particles.In this work,an effective nano-reinforcement dispersion strategy was developed to fabricate an ODS-Mo composite with ultrafine grain and intragranular distribution of second-phase particles.Core-shell structural Mo nanocomposite powders,with internally distributed sub-10 nm Al2O3 dispersoids,were prepared by nano atomization doping(AD)followed by a chemical vapor transport growth strategy.Then,ODS-Mo composites with ultra-fine Mo grain(below 700 nm)and high-density intragranular κ-Al2O3(below 20 nm)nanoparti-cles were prepared via spark plasma sintering(SPS),in which a coherent interface between κ-Al2O3 and Mo matrix was formed.The composites present remarkably improved hardness(above 500 HV),bend strength,and compressive yield strength(above 1664 MPa)at room temperature,with a suitable strain to fracture of 27.1％.The calculation of strengthening mechanisms indicates that the enhancement was mainly attributed to the intragranular κ-Al2O3 nanoparticles.This nano-sized reinforcement distributed within the grain can more effectively pin dislocations and achieve dispersion strengthening in ODS-Mo composites.Therefore,this strategy can efficiently construct intragranular second-phase nanoparticles and open up new avenues to fabricate high-performance ODS-Mo composites.
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    Processing,microstructure,mechanical properties,and hydrogen embrittlement of medium-Mn steels:A review

    Yan ZhangQizhe YeYu Yan
    44-57页
    查看更多>>摘要：As a representative of steels available in the market,medium-Mn steel shows vast application prospects in lightweight automobile fields.This review details the research progress of medium-Mn steels,focusing on the following aspects.The roles of common adding elements,rolling technologies,and various heat treatments on the microstructure and mechanical properties of medium-Mn steel are analyzed,thus pro-viding references for designing tailored medium-Mn steel with excellent performance.Considering that hydrogen embrittlement is a challenge faced in the development of high-strength steel,the hydrogen embrittlement behavior of medium-Mn steel is also discussed,particularly emphasizing the influence of microstructure,hydrogen concentration,strain,etc.Furthermore,practical strategies to improve resistance to hydrogen embrittlement are summarized.Finally,this review provides prospects for the development and research prospects of medium-Mn steel.
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    Formation of heterogeneous interfaces in the TiAl/Ti2AlNb layered composite and its effect on the fracture toughness

    Beibei WeiBin TangXiaofei ChenXiang Zhang...
    58-74页
    查看更多>>摘要：TiAl/Ti2AlNb intermetallic-intermetallic laminated(IIL)composites featuring brittle/ductile heterogeneous interfaces were fabricated through vacuum hot-pack rolling.The microstructures and the phase transfor-mation behaviors of the interfaces of the IIL composites before and after annealing at 900℃/6 h were in-vestigated.The heterogeneous interfaces are composed of four distinct regions,individually Ⅰ(βo+γ+α2),Ⅱ(βo/B2+ω)(brittle part),Ⅲ(O lath),and Ⅳ(equiaxed O)(ductile part)regions from TiAl to Ti2AlNb side.Notably,after annealing,an equiaxed O band approximately 50 μm wide was observed in region Ⅳ of the interface.In addition,a significant microhardness variation was observed between regions Ⅱ and Ⅳ of the interface,where region Ⅱ exhibited higher hardness compared to the TiAl alloy,and region Ⅳ displayed lower hardness than the Ti2AlNb alloy.The enhanced fracture toughness of the IIL composites,three times that of the TiAl base alloy,is attributed to the formation of the brittle/ductile heterogeneous interfaces and the layered design incorporating the Ti2AlNb alloy.The corresponding toughening mech-anism was further discussed.The brittle Ⅱ region plays a role in increasing crack branching,while the ductile Ⅳ region inhibits the propagation of microcracks and prevents the formation of main cracks.This work highlights the crucial role of the brittle/ductile heterogeneous interface in the toughening of lam-inated composites.Furthermore,the discovery of the O band provides novel insights into the design of TiAl/Ti2AlNb heterostructures.
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    Recent advances in protective technologies against copper corrosion

    Xiaomeng SheJian PengYujie QiangYue Zhou...
    75-94页
    查看更多>>摘要：Copper,one of the most frequently utilized non-ferrous metals,finds extensive applications in the elec-trical industry,mechanical engineering,construction industry,and arm production.Long-term exposure to corrosive environments including moisture,sulfur,chlorine,and microbes induces corrosion,a signifi-cant factor contributing to material deterioration.Consequently,numerous scientific endeavors have been directed towards the prevention of copper corrosion.Notably,coating copper with innovative materials like graphene,boron nitride,and various conductive polymers has proven effective in thwarting corro-sion.Additionally,the introduction of new organic compounds,including azole derivatives,amino acids,and N-heterocyclic carbenes,has bolstered the eco-friendliness and efficiency of corrosion inhibitors and molecular passivation techniques.Furthermore,these approaches have been extensively investigated for their efficacy in antioxidation of copper nanomaterials.This study provides a comprehensive review of the latest advancements in protective technologies,such as anti-corrosion coatings,corrosion inhibitors,and molecular passivation layers,aimed at countering copper corrosion under aggressive conditions.
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    Post-synthetic modifications(PSM)-induced defects in hybrid metal-organic frameworks(MOFs)to unleash potential in gas separation membrane applications

    Gyeong Min ChoiManas MandalHo Jin JungJagannath Panda...
    95-118页
    查看更多>>摘要：Metal-organic frameworks(MOFs)are a subclass of porous materials that have gained considerable at-tention recently due to their unique properties and potential applications.However,MOFs may exhibit defects affecting their gas separation performance,limiting their practical applications.This review arti-cle focuses on defects in MOFs and their impact on gas separation.Additionally,the reports explore the potential of De novo and post-synthetic modification(PSM)to improve the gas separation properties by tuning their defects.The PSM of MOFs is discussed in detail,including the different types of modifications and their effects on the MOF properties.Finally,the article discusses the potential of PSM for practical gas separation applications,highlighting recent examples of MOF-based membranes and adsorbents with improved gas separation performance resulting from PSM.It is strategically reasonable to have defects inside the MOFs,but why is it so fascinating in gas separation applications?In this present review,we have tried to uncover the mystery of defects.Overall,this review highlights the importance of defects in MOFs and the potential of PSM strategies to enhance their gas separation properties.
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    New strategy for efficient manufacturing of bulk anisotropic nanocrystalline Nd-Fe-B permanent magnets

    Qian LiLingqi LiuYuqing LiMing Yue...
    119-129页
    查看更多>>摘要：The application of bulk nanocrystalline Nd-Fe-B permanent magnets manufactured by hot deformation methods was severely limited by production efficiency.Therefore,this work proposed an efficient prepa-ration method combining hot rolling and deformation.Using the melt-spun Nd-Fe-B magnetic powders as original materials,dense,large-sized,and well-uniform precursors for deformation can be obtained through cold pressing and hot rolling.The large-sized hot-rolled magnet can be cut into small pieces and subjected to hot deformation.The deformed magnet exhibits obvious crystallographic anisotropy,and the optimal maximum energy product can reach 35.7 MGOe.Furthermore,the mechanism of defor-mation and texture formation has been systematically studied,according to the microstructure and tex-ture characterization of different height reduction magnets.The results indicated that there was a typical heterogeneous structure in the hot-rolled and hot-deformed Nd-Fe-B magnets.Dissolution precipitation,grain growth,and regular grain arrangement were the main reasons for deformation and texture forma-tion during the deformation process.Our strategy of replacing traditional hot-pressing with large-sized hot-rolling can produce massively deformed precursors at once,greatly improving production efficiency,which is crucial for promoting the application of bulk nanocrystalline anisotropic Nd-Fe-B permanent magnets.
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    Wearable one-handed keyboard using hydrogel-based mechanical sensors for human-machine interaction

    Wen LiShunxin WuMeicun KangXiaobo Zhang...
    130-138页
    查看更多>>摘要：As the Internet of Things advances,gesture recognition emerges as a prominent domain in human-machine interaction(HMI).However,interactive wearables based on conductive hydrogels for individuals with single-arm functionality or disabilities remain underexplored.Here,we devised a wearable one-handed keyboard with gesture recognition,employing machine learning algorithms and hydrogel-based mechanical sensors to boost productivity.PCG(PAM/CMC/rGO)hydrogels are composed of polyacrylamide(PAM),sodium carboxymethyl cellulose(CMC),and reduced graphene oxide(rGO),which function as a strain,pressure sensor,and electrode material.The PAM chains offer the gel's elasticity by covalent cross-linking,while the biocompatible CMC improves the dispersion of rGO and promotes electromechanical properties.Integrating rGO sheets into the polymer matrix facilitates cross-linking and generates supple-mentary conductive pathways,thereby augmenting the gel system's elasticity,sensitivity,and durability.Our hydrogel sensors include high sensitivity(gage factor(GF)=8.18,395.6％-551.96％)and superior pressure sensing capabilities(Sensitivity(S)=0.3116 kPa-1,0-9.82 kPa).Furthermore,we developed a wearable keyboard with up to 98.13％accuracy using convolutional neural networks and a custom data acquisition system.This study establishes the groundwork for creating multifunctional gel sensors for intelligent machines,wearable devices,and brain-computer interfaces.
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