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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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    Theoretical regulating the M-site composition of Janus MXenes enables the tailoring design for highly active bifunctional ORR/OER catalysts

    Shuang LuoNinggui MaJun ZhaoYuhang Wang...
    145-155页
    查看更多>>摘要：Rechargeable metal-air batteries generally require efficient,durable,and safe bifunctional electrocatalysts to simultaneously support oxygen reduction/evolution reactions(ORR/OER).Herein,we employed first-principles calculations to explore the structure-activity relationship between the composition control of metal atoms and the catalytic activity of Pt-doped Ti2-xMnxCO2 single-atom catalysts(SACs).The research found a clear linear relationship between the proportion of Mn and bifunctional performance,which can effectively modulate catalytic activity.Additionally,it shows excellent bifunctional catalytic activity at medium concentrations,among which the catalyst of Pt-VO-Ti0.89Mn1.11CO2 displays the lowest overpo-tential(ηORR/OER=0.26/0.28 V).Attributed to the modulation of the average magnetism of Mn and the d-band center of Pt by different components,the bonding strength of the active center of Pt to adsorption intermediates is changed,resulting in the enhancement of the catalyst activity.Crucially,the molecular orbital-level bonding between the active site Pt and the adsorbed intermediate OH is clarified,shedding light on the involvement of the partially occupied antibonding state of Pt's d orbital in the activation process.The research extensively explores the control of catalyst activity through composition,offering strong support for designing and optimizing highly active Janus MXene-supported SACs.
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    Recycling of flame retardant polymers:Current technologies and future perspectives

    Aurelio BifulcoJiuke ChenArvindh SekarWenyu Wu Klingler...
    156-183页
    查看更多>>摘要：Polymers are indispensable to humans in different applications due to their ease of manufacturing and overall performance.However,after a material lifetime,there is a large amount of polymer-based waste,which greatly contributes to the loss of valuable resources and environmental pollution.Thermoplastics may be readily recycled,but because of their flammability,large amounts of flame retardant(FR)ad-ditives are required for many applications.This results in a significant volume of FR polymeric wastes too,particularly halogenated plastics,which are subject to severe recycling regulations.In general,ther-moplastics containing FRs are raising concerns,as their effective recycling is strongly influenced by the chemical composition,additive content,and physicochemical characteristics of the waste stream.The recycling of FR thermosets is even more challenging due to their crosslinked and cured nature,which makes them resistant to melting and reprocessing.In many cases,traditional mechanical recycling meth-ods,such as grinding and melting,are not applicable to thermosetting polymers.Current recycling meth-ods do not always consider the recovery of the thermosetting/thermoplastic matrix and the presence of toxic FRs in the polymer network.Sorting and solvent washing treatment are important steps,which are usually performed before recycling the FR polymeric waste to reduce contamination in the following steps.Considering all the technical difficulties during recycling,the high cost of sorting and solvent washing,and the increasing demand for more sustainable procedures,the scientific community is fostering the transformation toward more feasible and energy-efficient recycling strategies.Also,many directives are imposing strict disposal and sorting rules,limiting the use of FR halogen-based compounds,and promot-ing the commercialization of more recyclable polymers.This review aims to provide a general overview of currently applied approaches for recycling FR thermoplastics and thermosets,and possible approaches for designing the next generation of FR polymer-based materials.The existing recycling strategies for FR polymers are summarized.Developments in the manufacturing of covalent adaptable networks as an outlook towards circularity in polymers are also addressed in this review.
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    Coupled study on in-situ synchrotron high-energy X-ray diffraction and in-situ EBSD on the interfacial stress gradient in layered metals

    Kesong MiaoYiping XiaRengeng LiEmad Maawad...
    184-196页
    查看更多>>摘要：As one of the heterostructures,the layered structure has attracted extensive research interest as it achieves superior properties to individual components.The layer interface is considered a critical fac-tor in determining the mechanical properties of layered metals,where heterogeneity across the interface results in the strengthening of the soft layer and forming an interfacial stress gradient in the hard layer.However,there is still limited research associated with the formation of interfacial stress gradients in the hard layer,as stress measurement at high spatial resolution remains technically challenging.In the present study,we experimentally quantified the formation of interfacial stress gradients in the Ti layer of Ti/Al layered metal upon tension using in-situ high-energy X-ray diffraction(XRD).The analysis cou-pling in-situ high-energy XRD and in-situ electron back-scattered diffraction(EBSD)suggested that the interfacial stress gradient in the Ti layer rapidly rose as the Al layer was insufficient to accommodate the deformation of Ti.During the later deformation stage,collective effects of dislocation motion and geometrically necessary dislocation(GND)accumulation in the Al layer determined the evolution of in-terfacial stress gradients.The maximum interfacial stress gradient is below 0.4 MPa/μm in Ti layers,with a constant range width of 35 μm independent of the macroscopic strain.The present study therefore opens a new window to local stress modification using incompatible component deformation,which is instructive for the design and fabrication of high-performance layered metals.
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    An in-situ cross-linked network PMMA-based gel polymer electrolyte with excellent lithium storage performance

    Shaopan QinMin WuHongshun ZhaoJianbin Li...
    197-205页
    查看更多>>摘要：Gel polymer electrolytes(GPEs)effectively combine the advantages of high ionic conductivity and re-duce the risk of leakage associated with liquid.In this study,a chemically cross-linked gel polymer electrolyte was prepared by in-situ polymerization using polymethyl methacrylate(PMMA)as a ma-trix and neopentyl glycol diacrylate(NPGDA)as cross-linking agent.The cross-linked structure of the GPE was preliminarily investigated,as well as the influence of the degree of cross-linking on its phys-ical properties.The GPE exhibited a superior conductivity of 1.391 mS cm-1 at 25 ℃.Herein,the Li|GPE|LiNi0.8Co0.1Mn0.1O2 cell has an excellent capacity retention rate of 80.7％after 150 cycles at 0.5 C in addition to a high discharge specific capacity of 203 mAh g-1.The structure of the cathode ma-terial is shielded from the production of byproducts during the charging and discharging of lithium-ion batteries by the cross-linked PMMA GPE.
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    Effect of phase decomposition on the mechanical properties of Ti-Zr-Nb-Ta-Mo multi-principal element alloys

    Weiji LaiXueyang ZhaoYanliang YiZheng Li...
    206-221页
    查看更多>>摘要：Body-centered cubic Ti-Zr-Nb-Ta-Mo multi-principal element alloys(MPEAs),boasting a yield strength ex-ceeding one gigapascal,emerge as promising candidates for demanding structural applications.However,their limited tensile ductility at room temperature presents a significant challenge to their processability and large-scale implementation.This study identifies phase decomposition as a critical factor influencing the plasticity of these alloys.The microscale phase decomposition in these MPEAs during solidification,driven by miscibility gaps,manifests as dendritic structures within grains.Closer examination reveals that the MPEAs with a pronounced thermodynamic propensity for phase decomposition are also suscep-tible to analogous phenomena at the atomic level.The atomic phase decomposition is characterized by the localized aggregation of some elements across nanometric domains,culminating in the establishment of short-range orderings(SROs).It is observed that phase decomposition for these MPEAs,occurring at both microscale and atomic scale,adheres to thermodynamic principles and can be predicted using the CALPHAD approach.The impact of phase decomposition on the plasticity of MPEAs fundamentally stems from the induced heterogeneities at three distinct levels:(1)Fluctuations in mechanical properties at the micron scale;(2)Variations in the strain field at the atomic scale;(3)Bond polarization and bond index fluctuations at the electronic scale.Consequently,the key to designing high-strength and high-plasticity MPEAs lies in maximizing lattice distortion while simultaneously minimizing the adverse effects of phase decomposition on the alloy's plasticity(grain boundary cohesion).This research not only clarifies the mechanisms underpinning the ductile-to-brittle transition in high-strength Ti-Zr-Nb-Ta-Mo MPEAs but also offers crucial guidelines for developing advanced,high-performance alloys.
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    Preparation of ultra-high ductility and high strength Mg-Sn-Zn-Zr alloy by differential thermal ECAP(DT-ECAP)induced heterogeneous structure

    Tianshui ZhouBing WangYaqin LiShiwen Hu...
    222-245页
    查看更多>>摘要：Developing high-ductility magnesium(Mg)alloys has become an imminent issue for their wide appli-cation.In this work,a new Mg-Sn-Zn-Zr alloy with ultra-high ductility(elongation,El.over 40％)and high ultimate tensile strength(UTS,～309-354 MPa)was prepared by a novel differential thermal equal-channel angular pressing(DT-ECAP).Heterogeneous structures,including bimodal grain structures and in-homogeneous distribution of second phases composed of banded structure and particle free zone(PFZ),were induced by DT-ECAP process.Based on the results of electron backscatter diffraction(EBSD),trans-mission electron microscopy(TEM),high-resolution TEM(HRTEM),and selected area electron diffraction(SAED),the bimodal grain structure originated from incomplete dynamic recrystallization(DRX)domi-nated by Zener pinning,strain-induced grain boundary migration(SIBM)and the limitation of polycrys-tallization due to lower dislocation density.Meanwhile,the bimodal distribution of second phases was highly associated with the defect density and initial structure.More importantly,the enhanced strength of DT-ECAPed alloys can be primarily attributed to hetero-deformation induced(HDI)strengthening,grain boundary strengthening,and precipitation strengthening.Moreover,HDI hardening,texture weakening or randomizing activation of non-basal slip,high density of dislocations in sub-structures,and twining in-duced superior work-hardening effect,which was highly responsible for the ultra-high ductility in sixth pass(6P)alloy.The current work provides a novel DT-ECAP process for inducing heterogeneous structure and offers beneficial insight into the development of ultra-high ductility and high strength for rare-earth-free Mg alloys via a combination of HDI strengthening and hardening and other vital mechanisms.
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    Composite demineralized bone matrix nanofiber scaffolds with hierarchical interconnected networks via eruptive inorganic catalytic decomposition for osteoporotic bone regeneration

    Sung Won KoJoshua LeeJi Yeon LeeJeong Hwi Cho...
    246-259页
    查看更多>>摘要：Demineralized bone matrix(DBM)is one of the standard biomaterials used to fill surgical bone defects in general orthopedic procedures.However,current DBM products come in the form of powder or viscous solutions that fail to mimic the natural hierarchical structure of bone while also using large amounts of valuable material.To overcome this,compact fibrous DBM/polymer(fDBM)composites were prepared via electrospinning.Then,by exploiting the catalytic decomposition of hydrogen peroxide,oxygen pockets are formed in the scaffold imparting it with a hierarchical porous structure similar to bone(Op-fDBM).These pockets created by bubbles of oxygen help give the scaffold a mechanically stable shape while the incorporated DBM supports cell adhesion and growth.In vivo evaluations reveal that fDBM increased bone volume by 41.7％while Op-fDBM increased bone volume by 68.6％.Significant increases in regenerated bone volume with the use of minimal amounts of DBM in fiber form go to show the great potential of this work in the field of bone regeneration.
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