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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。
正式出版
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    Atomistic observation of in situ fractured surfaces at a V-doped WC-Co interface

    Congying XiangMin ShenChongze HuLok Wing Wong...
    103-108页
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    Ultrastrong and ductile BCC high-entropy alloys with low-density via dislocation regulation and nanoprecipitates

    Xuehui YanPeter K.LiawYong Zhang
    109-116页
    查看更多>>摘要：The high strength is a typical advantage of body-centered-cubic high-entropy alloys(BCC-HEAs).How-ever,brittleness and weak strain-hardening ability are still their Achilles'heel.Here,extraordinary strength together with good tensile ductility are achieved in(Zr0.5Ti0.35Nb0.15)100-xAlx alloys(at.％,x=10 and 20)at room temperature.Relatively low densities of less than 6 g/cm3 are exhibited in these alloys.Designing nanoprecipitates and diversifying dislocation motions are the keys to achieving such salient breakthrough.It is worth noting that the tensile strength of 1.8 GPa in(Zr0.5Ti0.35Nb0.15)80Al20 alloy is a record-high value known in reported BCC-HEAs,as well as a tensile strain over 8％.Furthermore,the maximum strain of～25％in(Zr0.5Ti0.35Nb0.15)90Al10 alloy can challenge existing limit value,and is ac-companied with a tensile strength of 1.2 GPa.The current work does not only provide novel ultra-strong and tough structural materials with low density,but also sheds new light on designing BCC-HEAs with attractive performances and strain-hardening ability.
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    Microstructure and mechanical properties of directionally solidified Al-rich Ni3Al-based alloy under static magnetic field

    Xin LiuSansan ShuaiChenglin HuangShijun Wu...
    117-127页
    查看更多>>摘要：The influence of a longitudinal static magnetic field on microstructures and mechanical properties of Ni3AI-based alloy during directional solidification at the growth speed of 25 μm/s and 100 μm/s has been experimentally investigated.Results reflected that the utilization of a 0.5 T magnetic field refines the NiAl dendrites at both speeds of growth.When applying a high magnetic field,the columnar-to-equiaxed transition(CET)occurred at growth speed of 25 μm/s and dendrite networks formed at growth speed of 100 μm/s.Tensile property results indicated that the refinement of dendrites enhanced both plastic-ity and ultimate tensile strength of Ni-Al alloy.The change of microstructures and mechanical properties should be attributed to the combined action of the thermoelectric magnetic convection(TEMC)in mushy zone together with the thermoelectric magnetic force(TEMF)acting on the solid.When applying a low magnetic field(0.5 T),the TEMF is too small to fragment the dendrites,and the refined dendrites is mainly due to the TEMC in the interdendritic regions.At a lower growth speed,the TEMF is supposed to strong enough to fragment the dendrites and induce the occurrence of CET under 2 or 4 T.When the growth speed increased to 100 μm/s,no obvious CET was observed,but a vertical secondary convection is induced by the circulation in the parallel plane,which promotes the growth of secondary and tertiary branches,leading to the formation of abnormally developed high order dendrites.The hierarchical den-dritic structure was suggested to provide a channel for rapid crack propagation and thus degraded the mechanical properties.
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    Trimetallic oxyhydroxides as active sites for large-current-density alkaline oxygen evolution and overall water splitting

    Lei ChenYunpeng WangXin ZhaoYuchao Wang...
    128-135页
    查看更多>>摘要：Earth-abundant electrocatalysts for large-current-density water splitting under alkaline condition are de-sirable.Oxygen evolution reaction,which is a bottleneck of the overall water splitting,faces the problems of complicated reconstruction and deficiency in rational design of active sites.Herein,we report a series of transition metal chalcogenides for alkaline OER.Among them,FeCoNi(S)displayed a low overpotential of 293 mV to deliver a current density of 500 mA cm-2,which is in the top level of non-precious metal based OER electrocatalysts.A combination of(ex)in situ characterizations and DFT calculation shows that Ni(Fe,Co)trimetallic oxyhydroxides were the active sites for highly-efficient OER.Furthermore,for Fe-CoNi(S),when used as a bifunctional catalyst for water splitting,it only required a cell voltage of 1.84 V to deliver～500 mA cm-2 with extraordinary long-term stability over 2000 h.This work provides the comprehension of high-efficiency,robust catalysts for OER and overall water splitting at large current densities in alkaline media.
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    • 维普
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    Characterization of face-centered cubic structure and deformation mechanisms in high energy shot peening process of TC17

    C.YangM.Q.LiY.G.Liu
    136-151页
    查看更多>>摘要：The face-centered cubic structure(fcc)and its deformation behaviors,as well as the distinctive role of fcc-Ti in nanocrystallization in TC17 subjected to high energy shot peening(HESP),were investigated by using comprehensive high-resolution transmission electron microscopy(HRTEM).The results showed that there was a stress-induced fcc-Ti in TC17 with a lattice constant of 0.420-0.433 nm and the B-type orien-tation relationship between the hcp-Ti and the fcc-Ti as[2-1-10]hcp//[-110]fcc and(0001)hcp//(111)fcc,which was accomplished by the gliding of Shockley partial dislocations with Burgers vector of 1/3[01-10]on the basal plane.The deformation twinning dominated the subsequent deformation of fcc-Ti,producing two types of{111}<11-2>twins with different characteristics.Among them,the I-type twin with complete structure was generated by successive gliding of Shockley partial dislocations with the same Burgers vec-tor of 1/6[11-2].In contrast,the cooperative slip of three Shockley partials,whose sum of Burgers vectors was equal to zero,produced the Ⅱ-type twin with zero net macroscopic strain.And then,the emission of Shockley partial with the Burgers vector of 1/6[11-2]on every three(111)fcc planes resulted in the for-mation of a 9R structure.Due to the dissociation effect of lamellar fcc-Ti and the superior deformation ability of fcc structure,the occurrence of fcc-Ti effectively promoted surface nanocrystallization of TC17.
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    In-situ anion exchange based Bi2S3/OV-Bi2MoO6 heterostructure for efficient ammonia production:A synchronized approach to strengthen NRR and OER reactions

    Yuanyuan ZhangLi GuoYingxian WangTianyu Wang...
    152-160页
    查看更多>>摘要：Photocatalytic ammonia generation via nitrogen reduction reaction(NRR)is a green and prospective ni-trogen fixation technique.However,NRR is often hampered by the high N2 adsorption/activation ener-gies and is accompanied by a slow kinetics oxygen evolution reaction(OER).Herein,a robust Bi2S3/OV-Bi2MoO6 S-scheme heterojunction is constructed using a simple in-situ anion exchange process,which enables oxygen vacancy(OVs)abundant Bi2MoO6 microspheres with surface deposited Bi2S3.The as-fabricated Bi2S3/OV-Bi2MoO6 functioned as an effective photocatalyst to convert N2-to-NH3 under mild conditions.The photocatalytic NH3/NH4+production rate reached 126 μmol gcat-1 under visible light for 2.5 h with 2％of Bi2S3/OV-Bi2MoO6 photocatalyst,which was 8-fold higher than pristine Bi2MoO6.Fur-thermore,the as-fabricated Bi2S3/Bi2MoO6 heterojunction exhibited good selectivity,high stability and reproducibility.The excellent photocatalytic NRR performance was ascribed to the Bi2S3/Bi2MoO6 hetero-junction formed subsequent to the strong interaction between Bi2S3 and Bi2MoO6.The OVs facilitated the chemical adsorption process allowing activation of N2 molecule on the Bi2S3/Bi2MoO6.Simultane-ously,the S-scheme heterojunction prolonged the lifetime of photogenerated carriers,accelerated the electrons/holes spatial separation and accumulation on the Bi2S3(reduction)and Bi2MoO6 side(oxida-tion),respectively,thus strengthening both OER and NRR half-reactions.This simple in-situ anion ex-change method offers a novel technique for strengthening OER and NRR half-reactions in Bi-based pho-tocatalysts for effective photocatalytic ammonia generation.
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    Rational design of FeS2 microspheres as high-performance catalyst for electrooxidation of hydrazine

    Jie SunChuangwei LiuWenhan KongJie Liu...
    161-166页
    查看更多>>摘要：Inspired by the relatively recognized performance of transition metal sulfides in the oxidation of hy-drazine,the catalytic properties of FeS2 and Fe3S4 are compared via the density functional theory calcu-lations.Due to the different coordination numbers of iron-sulfur,the free energies of the dehydrogenation steps on FeS2 are far less than those on Fe3S4,which led to the much better catalytic performance of FeS2.Accordingly,FeS2 microspheres are rationally proposed as a more efficient electrocatalyst for hydrazine oxidation,which is then prepared by a facile one-step hydrothermal strategy.Such FeS2 microspheres show great activity for hydrazine oxidation with an onset oxidation potential of 0.22 V vs.reversible hydrogen electrode,and a peak current density of 16 mA cm-2.Meanwhile,stability and high faradaic efficiency(3.5e-/N2H4)is obtained for hydrazine oxidation to N2.
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    The determining role of carbon addition on mechanical performance of a non-equiatomic high-entropy alloy

    Xiaolin LiXiaoxiao HaoChi JinQi Wang...
    167-177页
    查看更多>>摘要：The mechanical properties and deformation mechanism of a C-doped interstitial high-entropy alloy(iHEA)with a nominal composition of Fe49.5Mn29.7C09.9Cr9.9C1(at.％)were investigated.An excellent com-bination of strength and ductility was obtained by cold rolling and annealing.The structure of the al-loy is consisted of FCC matrix and randomly distributed Cr23C6.For gaining a better understanding of deformation mechanism,EBSD and TEM were conducted to characterize the microstructure of tensile specimens interrupted at different strains.At low strain(2％),deformation is dominated by dislocations and their partial slip.With the strain increase to 20％,deformation-driven athermal phase transformation and dislocations slip are the main deformation mechanism.While at high strain of 35％before necking,deformation twins have been observed besides the HCP phase.The simultaneous effect of phase trans-formation(TRIP effect)and mechanical twins(TWIP effect)delay the shrinkage,and improve the tensile strength and plasticity.What's more,compared with the HEA without C addition,the yield strength of the C-doped iHEA has been improved,which can be attributed to the grain refinement strengthening and precipitation hardening.Together with the lattice friction and solid solution strengthening,the theoretical calculated values of yield strength match well with the experimental results.
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    Mild fabrication of SiC/C nanosheets with prolonged cycling stability as supercapacitor

    Shuang LiuEnhui WangShichun LiuChunyu Guo...
    178-186页
    查看更多>>摘要：A facile and mild route to synthesize C-coated SiC nanosheets(SiC/C NSs)via wet-chemical etching in hydrofluoric acid(HF)at 60℃for 48 h using carbon aluminum silicate(Al4SiC4)as raw materials is reported for the first time.HF molecule leads to the breaking of C-Al bonds in Al4SiC4,which even-tually results in the formation of two-dimensional SiC nanosheets.A carbon layer with a thickness of approximately 1.5 nm is formed on the surface of SiC nanosheets due to the excess carbon.The prepared SiC/C NSs possess a smooth and rectangular sheet with a mean 150 nm in width,500 nm in length and 10 nm in thickness,respectively.The crystallographic characterization indicates that 3C-SiC and 2H-SiC coexist and the parallel plane relationship of 3C/2H-SiC heterojunction is(111)3C-SiC//(001)2H-SiC.Due to the formed 3C-SiC/2H-SiC heterojunction and graphitic carbon,the fabricated electrode based on SiC/C NSs exhibits prolonged cycling stability and high specific areal capacitance as a promising supercapacitor candidate.It remains 91.2％retention even after 20,000 cycles and 734 μF/cm2 at a scan rate of 10 mV/s.
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    Enhanced electrical,mechanical and tribological properties of Cu-Cr-Zr alloys by continuous extrusion forming and subsequent aging treatment

    Zhe ShenZhongze LinPeijian ShiJiale Zhu...
    187-197页
    查看更多>>摘要：As a promising material for the new generation of high-speed railway contact wires,the comprehensive optimization of the electrical conductivity,strength,hardness and wear resistance of the Cu-Cr-Zr alloy has received extensive attention.In this paper,a high-performance Cu-1Cr-O.1Zr alloy with an ultimate tensile strength of 599.1 MPa,a uniform elongation of 8.6％,a microhardness of 195.7 HV0.2 and an electri-cal conductivity of 80.07％IACS was achieved by the continuous extrusion forming(CEF)and subsequent peak-aging treatment.The grain refinement strengthening,dislocation strengthening and precipitation strengthening are identified to be responsible for the excellent electrical and mechanical properties of Cu-Cr-Zr alloy.The wear behavior of Cu-Cr-Zr alloy was investigated by examining the evolution of worn surface morphology and subsurface microstructure.The microhardness(H)and reduced elastic modulus(Er)of the subsurface below the worn surface measured by nanoindentation were calculated to gage the tribological performance of Cu-Cr-Zr alloy.Results show that the continuously extruded and subsequently peak-aged specimen has the best wear resistance,which indicates that the tribological properties of Cu-Cr-Zr alloy strongly depend on its strength and hardness.It can be concluded that the CEF and subsequent aging treatment process provides a new and high-efficiency procedure for the continuous preparation of Cu-Cr-Zr alloys.
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