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Relationship between composite structures and compressive properties in CuZr-based bulk metallic glass system

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Chinese Science Bulletin 2011年第36期56卷 3960-3964页

作者： WU Yuan SONG WenLi ZHANG ZhongYan HUI xidong MA Dong wang XunLi SHANG XinCun LU ZhaoPing State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing Beijing 100083 China Neutron Scattering Science Division Oak Ridge National Laboratory Oak Ridge Tennessee 37831 USA Department of Mathematics and Mechanics University of Science and Technology Beijing Beijing 100083 China

Bulk metallic glass (BMG) composites with the austenite B2 phase as reinforcement macroscopically showed strain hardening behavior due to the plasticity induced by martensitic transformation during deformation. Relationship between characteristics of the B2-CuZr reinforcing phase and uniaxial compressive properties of CuZr-based BMG composites was studied. Mechanical properties of these BMG composites were found to depend on not only the reinforced phases but also the amorphous matrix,and the yield and fracture strength can be roughly estimated by the rule of mixture principle. Distribution of the reinforced B2-CuZr phase has an important impact on the compressive plasticity even for the composites with a similar volume fraction of the crystalline phase.

关键词：复合材料结构大块金属玻璃压缩性能相变诱导塑性非晶复合材料应变硬化变形过程机械性能

Structure and Stability of TiC/γ Interface inFe-Cr-Ni Base Composite

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Journal of Materials Science & Technology 1999年第2期15卷 151-154页

作者： xidong HUI Yuansheng YANG and Xnqiang WU (Institute of Metal Research, Chinese Academia of Science, Shenyang 110015, China)Zhifu wang(Shandong University of Technology, Jinan 250061, China)Xichen CHEN(Institute of Physics, Chinese Academia of Science, Be Institute of Metal Research Chinese Academia of Science Shenyang 110015 China Shandong University of Technology Jinan 250061 China Institute of Physics Chinese Academia of Science Beijing 100080 China

The morphology. orientation relationship and stability of TiC/γ interface in Fe-Cr-Ni base composite synthesized with a liquid state in-situ process have been studied. The TiC/γ interface in as-cast sample is of coherent feature. Its orientation relationship is (020)γ／／(220)TiC, [001]γ||[001]TiC. During the aging at 1473 K, the TiC/γ interface may dissolve in matrix and lamellar M23C6 compound may precipitate from γ-matrix.

关键词： Structure and Stability of TiC Base Cr Interface inFe-Cr-Ni Base Composite Ni

van der Waals epitaxial growth of ultrathin metallic NiSe nanosheets on WSe2 as high performance contacts for WSe2 transistors

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Nano Research 2019年第7期12卷 1683-1689页

作者： Bei Zhao Weiqi Dang Xiangdong Yang Jia Li Haihong Bao Kai wang Jun Luo Zhengwei Zhang Bo Li Haipeng Xie Yuan Liu xidong Duan Hunan Key Laboratory of Two-Dimensional Materials State Key Laboratory for Chemo/Biosensing and ChemometricsCollege of Chemistry and Chemical EngineeringHunan UniversityChangsha 410082China School of Physics and Electronics Hunan UniversityChangsha 410082China Center for Electron Microscopy Institute for New Energy Materials and Low-Carbon Technologies School of Materials Tianjin University of TechnologyTianjin 300384China Hunan Key Laboratory of Super-microstructure and Ultrafast Process College of Physics and ElectronicsCentral South UniversityChangsha 410083China

A prerequisite for widespread applications of atomically thin transition metal dichalcogenides in future electronics is to achieve reliable electrical contacts,which is of considerable challenge due to the difficulties in selectively doping and inevitable physical damages of these atomically thin materials during typical metal integration ***,we report the in situ growth of ultrathin metallic NiSe single crystals on WSe2 in which the metallic NiSe nanosheets function as the contact electrodes to WSe2,creating an interface that is essentially free from chemical *** NiSe/WSe2 heterostructures also exhibit well-aligned lattice orientation between the two layers,forming a periodic Moire *** transport studies demonstrate that the NiSe nanosheets exhibit an excellent metallic feature,as evidenced by the extra-high electrical conductivity of up to 1.6×10^6 *** WSe2 transistors with the NiSe contact show field-effect mobilities (/vFe) more than double that with Cr/Au *** study demonstrates an effective pathway to achieve reliable electrical contacts to the atomically thin 2D materials,and maybe readily extended for fabricating 2D/2D low-resistance contacts for a variety of transition metal dichalcogenides.

关键词： in situ growth nonlayered NiSe nanosheets Schottky barrier metal-semiconductor junctions chemical vapor deposition

Synergistic enhancement of immunological responses triggered by hyperthermia sensitive Pt NPs via NIR laser to inhibit cancer relapse and metastasis

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Bioactive Materials 2022年第1期7卷 389-400页

作者： Jie Yu Sha Liu Yupeng wang xidong He Qingfei Zhang Yanxin Qi Dongfang Zhou Zhigang Xie Xiaoyuan Li Yubin Huang State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun130022PR China University of Science and Technology of China Hefei230026PR China Faculty of Chemistry Northeast Normal UniversityChangchun130024PR China

The combination of tumor ablation and immunotherapy is a promising strategy against tumor relapse and *** therapy(PTT)triggers the release of tumor-specific antigens and damage associated molecular patterns(DAMPs)***,the immunosuppressive tumor microenvironment restrains the activity of the effector immune ***,systematic immunomodulation is critical to stimulate the tumor microenvironment and augment the anti-tumor therapeutic *** this end,polyethylene glycol(PEG)-stabilized platinum(Pt)nanoparticles(Pt NPs)conjugated with a PD-L1 inhibitor(BMS-1)through a thermo-sensitive linkage were *** near-infrared(NIR)exposure,BMS-1 was released and maleimide(Mal)was exposed on the surface of Pt NPs,which captured the antigens released from the ablated tumor cells,resulting in the enhanced antigen internalization and *** addition,the Pt NPs acted as immune adjuvants by stimulating dendritic cells(DCs)***,BMS-1 relieved T cell exhaustion and induced the infiltration of effector T cells into the tumor ***,Pt NPs can ablate tumors through PTT,and augment the anti-tumor immune response through enhanced antigen presentation and T cells infiltration,thereby preventing tumor relapse and metastasis.

关键词： Pt nanoparticles PD-L1 small molecule inhibitors Antigen-capturing Anti-Tumor immunological effects Photothermal sensitive

Controlled vapor growth of 2D magnetic Cr_(2)Se_(3)and its magnetic proximity effect in heterostructures

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Chinese Physics B 2021年第9期30卷 25-30页

作者： Danliang Zhang Chen Yi Cuihuan Ge Weining Shu Bo Li xidong Duan Anlian Pan Xiao wang School of Physics and Electronics Hunan UniversityChangsha 410082China Key Laboratory for Micro-Nano Physics and Technology of Hunan Province College of Materials Science and EngineeringHunan UniversityChangsha 410082China Hunan Key Laboratory of Two-Dimensional Materials and State Key Laboratory for Chemo/Biosensing and Chemometrics College of Chemistry and Chemical EngineeringHunan UniversityChangsha 410082China

Two-dimensional(2D)magnetic materials have aroused tremendous interest due to the 2D confinement of magnetism and potential applications in spintronic and valleytronic ***,most of the currently 2D magnetic materials are achieved by the exfoliation from their bulks,of which the thickness and domain size are difficult to control,limiting the practical device ***,we demonstrate the realization of thickness-tunable rhombohedral Cr_(2)Se_(3)nanosheets on different substrates via the chemical vapor deposition *** magnetic transition temperature at about 75 K is ***,van der Waals heterostructures consisting of Cr_(2)Se_(3)nanosheets and monolayer WS2 are *** observe the magnetic proximity effect in the heterostructures,which manifests the manipulation of the valley polarization in monolayer *** work contributes to the vapor growth and applications of 2D magnetic materials.

关键词： Cr_(2)Se_(3) magnetic proximity effect heterostructures

Synthesis of two-dimensional/one-dimensional heterostructures with tunable width

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Journal of Semiconductors 2021年第9期42卷 37-41页

作者： Di wang Zucheng Zhang Bo Li xidong Duan Hunan Key Laboratory of Two-Dimensional Materials State Key Laboratory for Chemo/Biosensing and ChemometricsCollege of Chemistry and Chemical EngineeringHunan UniversityChangsha 410082China

Two-dimensional/one-dimensional(2D/1D)heterostructures as a new type of heterostructure have been studied for their unusual properties and promising applications in electronic and optoelectronic ***,the studies of 2D/1D heterostructures are mainly focused on vertical heterostructures,such as MoS_(2) nanosheet-carbon *** research on lateral 2D/1D heterostructures with a tunable width of 1D material is still *** this study,bidirectional flow chemical vapor deposition(CVD)was used to accurately control the width of the WS_(2)/WSe2(WS_(2)/MoS_(2))heterostructures by controlling reacting ***2 and MoS_(2) with different widths were epitaxially grown at the edge of WS_(2),*** microscope,atomic force microscope(AFM),and scanning electron microscope(SEM)images show the morphology and width of the *** results show that the width of the heterostructures can be as low as 10 nm by using this *** interface of the heterostructure is clear and smooth,which is suitable for *** report offers a new method for the growth of 1D nanowires,and lays the foundation for the future study of the physical and chemical properties of 2D/1D lateral heterostructures.

关键词： chemical vapor deposition(CVD) 2D/1D heterostructures width control

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石英砂对UHPC力学性能的影响规律

黑龙江科学 2024年第8期15卷 10-13页

作者：刘娇姜雨奇李希东蒋雪妮张爱勤王日升威海市公路勘察设计院有限公司山东威海264200 山东交通学院济南250300

研究了标准砂与工业石英砂作为细集料对UHPC100力学性能的影响规律。试验结果表明,两种养护条件下,标准砂UHPC3 d抗压与抗折强度增长较快,28 d两种砂的强度逐渐一致,但工业石英砂UHPC的抗折强度增长更高,抗拉强度与弹性模量则随着龄期... 详细信息

研究了标准砂与工业石英砂作为细集料对UHPC100力学性能的影响规律。试验结果表明,两种养护条件下,标准砂UHPC3 d抗压与抗折强度增长较快,28 d两种砂的强度逐渐一致,但工业石英砂UHPC的抗折强度增长更高,抗拉强度与弹性模量则随着龄期呈明显增长趋势,不论是标准养护还是高温养护,工业用石英砂UHPC7 d力学性能更加突出,高温养护条件更佳。

关键词： UHPC 工业石英砂标准砂力学性能

Simultaneously transmitting and reflecting(STAR)RISs for 6G:fundamentals,recent advances,and future directions

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Frontiers of Information Technology & Electronic Engineering 2023年第12期24卷 1689-1707页

作者： Yuanwei LIU Jiaqi XU Zhaolin wang xidong MU Jianhua ZHANG Ping ZHANG School of Electronic Engineering and Computer Science Queen Mary University of LondonLondonE14NSUK State Key Laboratory of Networking and Switching Technology Beijing University of Posts and TelecommunicationsBeijing100876China

Simultaneously transmitting and reflecting reconfigurable intelligent surfaces(STAR-RISs)have been attracting significant attention in both academia and industry for their advantages of achieving 360°coverage and enhanced *** article first identifies the fundamentals of STAR-RIS,by discussing the hardware models,channel models,and signal ***,three representative categorizing approaches for STAR-RISs are introduced from the phase-shift,directional,and energy consumption ***,the beamforming design of STAR-RISs is investigated for both independent and coupled phase-shift *** a recent advance,a general optimization framework,which has high compatibility and provable optimality regardless of the application scenarios,is *** a further advance,several promising applications are discussed to demonstrate the potential benefits of applying STAR-RISs in sixth-generation wireless ***,a few future directions and research opportunities are highlighted.

关键词： Sixth-generation wireless communication(6G) Reconfigurable intelligent surface(RIS) Smart radio environment Simultaneous transmission and reflection

High-throughput investigations of configurational-transformation-dominated serrations in CuZr/Cu nanolaminates

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Journal of Materials Science & Technology 2020年第18期52卷 192-199页

作者： William Yi wang Bin Gana Deye Lin Jun wang Yiguang wang Bin Tang Hongchao Kou Shunli Shang Yi wang Xingyu Gao Haifeng Song xidong Hui Laszlo J.Kecskes Zhenhai Xia Karin A.Dahmen Peter K.Liaw Jinshan Lia Zi-Kui Liu State Key Laboratory of Solidification Processing Northwestern Polytechnical UniversityXi'an.710072China Beijing Key Laboratory of Advanced High Temperature Materials Central Iron and Steel Research InstituteBeijing100081China IMDEA Materials Institute Calle Eric Kandel 2GetafeMadrid28906Spain CAEP Software Center for High Performance Numerical Simulation Institute of Applied Physics and Computational MathematicsBeijing100088China Department of Materials Science and Engineering The Pennsylvania State UniversityUniversity ParkPA16802USA State Key Laboratory for Advanced Metals and Materials University of Science and Technology BeijingBeijing100083China Hopkins Extreme Materials Institute Johns Hopkins UniversityBaltimoreMD21218USA Department of Physics University of Illinois at Urbana ChampaignUrbanaIL61801USA Department of Materials Science and Engineering The University of TennesseeKnoxvilleTN37996USA

Metallic amorphous/crystalline(A/C)nanolaminates exhibit excellent ductility while retaining their high ***,the underlying physical mechanisms and the resultant structural changes during plastic deformation still remain *** the present work,the structure-property relationship of CuZr/Cu A/C nanolaminates is established through integrated high-throughput micro-compression tests and molecular dynamics simulations together with high-resolution transmission electron *** serrated flow of nanolaminates results from the formation of hexagonal-close-packed(HCP)-type stacking faults and twins inside the face-centered-cubic(FCC)Cu nano-grains,the body-centered-cubic(BCC)-type ordering at their grain boundaries,and the crystallization of the amorphous CuZr *** serration behavior of CuZr/Cu A/C nanolaminates is determined by several factors,including the formation of dense dislocation networks from the multiplication of initial dislocations that formed after yielding,weak-spots-related configurational-transitions and shear-transition-zone activities,and deformation-induced *** present work provides an insight into the heterogeneous deformation mechanism of A/C nanolaminates at the atomic scale,and mechanistic base for the microstructural design of self-toughening metallic-glass(MG)-based composites and A/C nanolaminates.

关键词： Nanolaminates Serration Configurational transformation Molecular dynamics Metallic glass