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Assessing structure of Mg_(3)Bi_(2-x)Sb_(x)(0≤x≤2)at pressures below 40 GPa

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Journal of Materiomics 2024年第4期10卷 837-844页

作者： Weiwei Dong Wei xu Zhiying Guo Weishu Liu yu pan Satishkumar Kulkarni xiaodong Li Konstantin Glazyrin Beijing Synchrotron Radiation Facility(BSRF) Institute of High Energy PhysicsChinese Academy of Sciences100049BeijingChina Deutsches elektronen-Synchrotron DeSy Notkestr.8522607HamburgGermany International Centre for Material Science Superstripes RICMASSVia dei Sabelli 119A00185RomeItaly Department of Materials Science and engineering Southern University of Science and Technology518055ShenzhenChina Max-Planck-Institute for Chemical Physics of Solids Nöthnitzer Straße 4001187DresdenGermany Centre for x-ray and Nanoscience CxNS Deutsches Elektronen Synchrotron DESYNotkestr.8522607HamburgGermany

Mg_(3)Bi_(2-x)Sb_(x)(0≤x≤2)have gained significant attention due to their potential in thermoelectric(Te)***,there has been much debating regarding their structural properties and phase diagram as a function of pressure,which is crucial for understanding of their Te ***,we investigate a unified phase diagram of Mg_(3)(Bi,Sb)_(2) materials up to 40 GPa at room temperature using high-pressure x-ray *** high-pressure phases with the structural transition succession of P3m1→C2/m→P21/n are observed,which is valid for all Mg_(3)Bi_(2-x)Sb_(x)(0≤x≤2)*** further explore the low-pressure phase P3m1 and report that alloying does not change the quasi-isotropic compression of the unit lattice parameters nor has effect on the anisotropic bond compressibility,as recently reported for the *** study presents a comprehensive picture of Mg3Bi2–xSbx as a function of pressure and chemical composition providing a solid foundation for the future experimental and theoretical studies searching for the most efficient Te compound in Mg_(3)(Bi,Sb)_(2).

关键词： Mg_(3)Bi_(2-x)Sb_(x)(0≤x≤2) Thermoelectric High-pressure Structural evolution

Interfacial Reaction of Ti6Al4V Lattice Structure-Reinforced VW92 Alloy Matrix Composites

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Acta Metallurgica Sinica(english Letters) 2024年第3期37卷 570-576页

作者： Haijun Wang Renju Cheng xianhua Chen Mingbo yang Daiyi Deng Lirui Liu yongfeng Zhou yanlong Ma Kaihong Zheng Fusheng pan College of Materials Science and engineering Chongqing University of TechnologyChongqing 400054China College of Materials Science and engineering Chongqing UniversityChongqing 400044China Institute of New Materials Guangdong Academy of SciencesGuangzhou 510650China

A novel melting infiltration by ultrasonic vibration was investigated and applied to fabricate Ti6Al4V(TC4)lattice structure-reinforced Mg-10Gd-2y-1Zn-xZr(refer to VW92 hereafter,x=0,0.5 wt%)alloy matrix *** edge-to-edge matching model indicates that the well-matching and possible orientation relationships(ORs)between theα-Mg andα-Ti,[10-10]_(α-Mg)//[11-23]_(α-Ti) in(0002)_(α-Mg)//(10-10)_(α-Ti) possesses the smallest misfit of 0.4%(f_(r)),and thus theα-Mg grains can nucleate on the TC4 lattice *** reaction occurred in the TC4/VW92+0.5 wt%Zr composites,and the reaction product was confirmed to be Al_(2)Zr_(3),AlZr_(2) andα-Ti(Zr)particles formed by continuous solution of *** the interfacial products,the AlZr_(2) phase is a brittle phase with high-volume fraction,which is not conducive to the load *** generally speaking,theα-Ti(Zr)and theα-Mg tend to form a coherent interface,which is beneficial for improving the interfacial bonding strength of composites.

关键词： TC4 VW92 composites TC4 lattice structure Interfacial reaction Mismatch

Numerical investigation on thermomechanical behavior of alumina–calcium hexaluminate refractories for purging plug

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Journal of Iron and Steel Research International 2024年第2期31卷 389-400页

作者： Li-ping pan ya-wei Li Fang-guan Tan yi-chen Chen yang-fan xu Zhu He Bao-kuan Li The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and TechnologyWuhan430081HubeiChina National-Provincial Joint engineering Research Center of High Temperature Materials and Lining Technology Wuhan University of Science and TechnologyWuhan430081HubeiChina

Alumina–spinel refractories used in slit-type purging plugs are susceptible to cross-sectional damage,resulting in a serious mismatch between their service life and that of ***–calcium hexaluminate refractories have gradually become the new trend in purging plug materials with the development of refining *** thermomechanical damage of slit-type purging plugs with alumina–calcium hexaluminate refractory was investigated by the thermo-solid coupling *** with the polynomial fitting and design of experiments methods,the influence of thermophysical parameters on temperature and thermal stress of alumina–calcium hexaluminate refractories for purging plugs was systematically *** results show that the maximum thermal stress of the purging plugs appears during the stages of steel transporting and stirring,and the vulnerable parts are located above y=0.323 *** thermal conductivity and the coefficient of thermal expansion of the material are the most sensitive parameters to the temperature and thermal stress inside the structure,*** addition of more calcium hexaluminate can relieve the stress concentration and large deformation around the ***,when the content of calcium hexaluminate is 47 wt.%and in the form of aggregate-binder,the temperature and thermal stress distribution inside the refractory are optimal,which can effectively improve the service life of the slit-type purging plug.

关键词： Purging plug Thermomechanical damage Refractory Design of experiments method Stress

embedded high-quality ternary GaAs_(1−x)Sb_(x) quantum dots in GaAs nanowires by molecular-beam epitaxy

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Journal of Semiconductors 2024年第8期45卷 18-24页

作者： xiyu Hou Lianjun Wen Fengyue He Ran Zhuo Lei Liu Hailong Wang Qing Zhong Dong pan Jianhua Zhao State Key Laboratory of Superlattices and Microstructures Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China College of Materials Science and Opto-electronic Technology University of Chinese Academy of SciencesBeijing 100049China

Semiconductor quantum dots are promising candidates for preparing high-performance single photon sources.A basic requirement for this application is realizing the controlled growth of high-quality semiconductor quantum ***,we report the growth of embedded GaAs_(1−x)Sb_(x) quantum dots in GaAs nanowires by molecular-beam *** is found that the size of the GaAs_(1−x)Sb_(x) quantum dot can be well-defined by the GaAs *** dispersive spectroscopy analyses show that the antimony content x can be up to 0.36 by tuning the growth *** GaAs_(1−x)Sb_(x) quantum dots exhibit a pure zinc-blende *** addition,we have developed a new technology to grow GaAs passivation layers on the sidewalls of the GaAs_(1−x)Sb_(x) quantum *** from the traditional growth process of the passivation layer,GaAs passivation layers can be grown simultaneously with the growth of the embedded GaAs_(1−x)Sb_(x) quantum *** spontaneous GaAs passivation layer shows a pure zinc-blende phase due to the strict epitaxial relationship between the quantum dot and the passivation *** successful fabrication of embedded high-quality GaAs_(1−x)Sb_(x) quantum dots lays the foundation for the realization of GaAs_(1−x)Sb_(x)-based single photon sources.

关键词： semiconductor quantum dot nanowire GaAs_(1−x)Sb_(x) molecular-beam epitaxy

High-entropy rare earth stannate ceramics:Acid corrosion resistant radiative cooling materials with high atmospheric transparency window emissivity and high near-infrared solar reflectivity

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Journal of Advanced Ceramics 2024年第5期13卷 630-640页

作者： Tao Chen yanyan He yanyu pan Kaixian Wang Minzhong Huang Liyan xue yazhu Li Fan yang yanchun Zhou Heng Chen Fujian Institute of Research on the Structure of Matter Chinese Academy of SciencesFuzhou 350002China College of Chemistry and Materials Science Fujian Normal UniversityFuzhou 350117China xiamen Institute of Rare earth Materials Haixi InstitutesChinese Academy of SciencesXiamen 361021China Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou 350108China xiamen Key Laboratory of Rare earth Photoelectric Functional Materials Xiamen Institute of Rare Earth MaterialsHaixi InstitutesChinese Academy of SciencesXiamen 361021China Key Laboratory of Rare earths Ganjiang Innovation AcademyChinese Academy of SciencesGanzhou 341000China School of Materials Science and engineering Zhengzhou UniversityZhengzhou 450001China

In response to the development of the concepts of“carbon neutrality”and“carbon peak”,it is critical to developing materials with high near-infrared(NIR)solar reflectivity and high emissivity in the atmospheric transparency window(ATW;8–13μm)to advance zero energy consumption radiative cooling *** regulate emission and reflection properties,a series of high-entropy rare earth stannate ceramics(He-Re_(2)Sn_(2)O_(7):(y_(0.2)La_(0.2)Nd_(0.2)eu_(0.2)Gd_(0.2))_(2)Sn_(2)O_(7),(y_(0.2)La_(0.2)Sm_(0.2)eu_(0.2)Lu_(0.2))_(2)Sn_(2)O_(7),and(y_(0.2)La_(0.2)Gd_(0.2)yb_(0.2)Lu_(0.2))_(2)Sn_(2)O_(7))with severe lattice distortion were prepared using a solid phase reaction followed by a pressureless sintering method for the first *** distortion is accomplished by introducing rare earth elements with different cation radii and *** as-synthesized He-Re_(2)Sn_(2)O_(7)ceramics possess high ATW emissivity(91.38%–95.41%),high NIR solar reflectivity(92.74%–97.62%),low thermal conductivity(1.080–1.619 W·m^(−1)·K^(−1)),and excellent chemical *** the one hand,the lattice distortion intensifies the asymmetry of the structural unit to cause a notable alteration in the electric dipole moment,ultimately enlarging the ATW *** the other hand,by selecting difficult excitation elements,He-Re_(2)Sn_(2)O_(7),which has a wide band gap(eg),exhibits high NIR solar ***,the multi-component design can effectively enhance radiative cooling ability of He-Re_(2)Sn_(2)O_(7)and provide a novel strategy for developing radiative cooling materials.

关键词： radiative cooling materials high-entropy ceramics(HeCs) rare earth stannate(Re_(2)Sn_(2)O_(7)) high atmospheric transparency window emissivity high near-infrared(NIR)solar reflectivity

Drug repurposing screen identifies vidofludimus calcium and pyrazofurin as novel chemical entities for the development of hepatitis e interventions

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Virologica Sinica 2024年第1期39卷 123-133页

作者： Hongbo Guo Dan Liu Kuan Liu yao Hou Chunyang Li Qiudi Li xiaohui Ding Monique M.A.Verstegen Jikai Zhang Lingli Wang yibo Ding Renxian Tang xiucheng pan Kuiyang Zheng Luc J.Wvan der Laan Qiuwei pan Wenshi Wang Department of Pathogen Biology and Immunology Jiangsu Key Laboratory of Immunity and MetabolismJiangsu International Laboratory of Immunity and MetabolismXuzhou Medical UniversityXuzhou221004China Department of Gastroenterology and Hepatology Erasmus MC-University Medical CenterRotterdamNL-3015 CNthe Netherlands Department of Surgery Erasmus MC Transplant InstituteUniversity Medical CenterRotterdam3015CENL-3015 CNthe Netherlands Department of Infectious Diseases The Affiliated Hospital of Xuzhou Medical UniversityXuzhou221002China

Hepatitis e virus(HeV)infection can cause severe complications and high mortality,particularly in pregnant women,organ transplant recipients,individuals with pre-existing liver disease and immunosuppressed ***,there are still unmet needs for treating chronic HeV ***,we screened a best-in-class drug repurposing library consisting of 262 drugs/*** screening,we identified vidofludimus calcium and pyrazofurin as novel anti-HeV *** calcium is the next-generation dihydroorotate dehydrogenase(DHODH)inhibitor in the phase 3 pipeline to treat autoimmune diseases or SARS-CoV-2 *** selectively targets uridine monophosphate synthetase(UMPS).Their anti-HeV effects were further investigated in a range of cell culture models and human liver organoids models with wild type HeV strains and ribavirin treatment failure-associated HeV ***,both drugs exhibited a sizeable therapeutic window against *** instance,the IC50 value of vidofludimus calcium is 4.6–7.6-fold lower than the current therapeutic doses in ***,their anti-HeV mode of action depends on the blockage of pyrimidine ***,two drugs robustly inhibited ribavirin treatment failure-associated HeV mutants(y1320H,G1634R).Their combination with IFN-αresulted in synergistic antiviral *** conclusion,we identified vidofludimus calcium and pyrazofurin as potent candidates for the treatment of HeV *** on their antiviral potency,and also the favorable safety profile identified in clinical studies,our study supports the initiation of clinical studies to repurpose these drugs for treating chronic hepatitis e.

关键词： Hepatitis evirus(HeV) Drug repurposing Vidofludimus calcium Pyrazofurin Pyrimidine biosynthesis

High toughness and CMAS resistance of ReAlO_(3)/Re_(2)Zr_(2)O_(7)(Re=La,Nd,Sm,eu,Gd,and Dy)composites with eutectic composition for thermal barrier coatings

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Journal of Advanced Ceramics 2024年第6期13卷 800-809页

作者： Zijian Zhang Jian Sun Guanghua Liu yi Han Wei Liu yi Li Wei Wang xiangyang Liu Peng Zhang Wei pan Chunlei Wan State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China China United Gas Turbine Technology Co. Ltd.Beijing 100015China College of Mathematics and Physics Beijing University of Chemical TechnologyBeijing 100029China College of Materials Science and engineering Beijing University of TechnologyBeijing 100124China

Although rare earth zirconates(Re_(2)Zr_(2)O_(7))have garnered attention as viable candidates for thermal barrier coatings(TBCs),they suffer from low fracture toughness and accelerated calcium–magnesium–alumina–silicate(CMAS)melt corrosion at high service temperatures,which impedes their practical *** this work,we developed a series of ReAlO_(3)/Re_(2)Zr_(2)O_(7)(Re=La,Nd,Sm,eu,Gd,and Dy)composites with a eutectic composition that not only significantly enhanced the fracture toughness by more than 40%relative to that of Re_(2)Zr_(2)O_(7)but also exhibited improved resistance to CMAS *** increase in toughness arises from multiple mechanisms,such as ferroelastic toughening,fine-grain strengthening,and residual stress toughening,all of which trigger more crack defects and energy ***,the CMAS penetration depth of the ReAlO_(3)/Re_(2)Zr_(2)O_(7)composites is approximately 36%lower than that of Re_(2)Zr_(2)O_(7).Al–O constituents in composites can capture CaO,SiO_(2),and MgO in CMAS melts and increase their viscosity,resulting in enhanced CMAS corrosion *** thermophysical properties of the ReAlO_(3)/Re_(2)Zr_(2)O_(7)composites were also investigated,and their coefficient of thermal expansion and thermal conductivity are comparable to those of 7–8 wt%y_(2)O_(3)partially stabilized ZrO2(ySZ),indicating their potential as TBC materials.

关键词： fracture toughness thermal property calcium-magnesium-alumina-silicate(CMAS)corrosion ReAlO_(3)/Re_(2)Zr_(2)O_(7) eutectic composition

Pressure-induced color change arising from transformation between intra-and inter-band transitions in LuH_(2±x)N_(y)

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Science China(Physics,Mechanics & Astronomy) 2024年第2期67卷 161-166页

作者： Zhe Liu yingjie Zhang Shenyang Huang xue Ming Qing Li Chenghao pan yaomin Dai xiaoxiang Zhou xiyu Zhu Hugen yan Hai-Hu Wen Center for Superconducting Physics and Materials National Laboratory of Solid State Microstructures and Department of PhysicsNational Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China State Key Laboratory of Surface Physics Key Laboratory of Micro and Nano-Photonic Structures of the Ministry of EducationDepartment of PhysicsFudan UniversityShanghai 200433China

The pressure-induced color change in the nitrogen-doped lutetium hydride has triggered extensive discussions about the underlying physics and potential ***,we study the optical response of LuH_(2±x)N_(y)in a broad frequency range at ambient pressure and its evolution with pressure in the visible spectral *** broad-band optical spectra at ambient pressure reveal a Drude component associated with intra-band electronic transitions and two Lorentz components(L1 and L2)arising from inter-band electronic *** application of pressure causes a spectral weight transfer from L1 to the Drude component,leading to a blue shift of the plasma edge in the reflectivity spectrum alongside a reduction of the high-frequency *** results suggest that the pressure-induced color change in LuH_(2±x)N_(y)is closely related to the transformation between intra-and inter-band electronic transitions,providing new insights into the mechanism of the pressure-induced color change in LuH_(2±x)N_(y).

关键词： nitrogen-doped lutetium hydride optical spectroscopy high-pressure technique color change

Protein-activated atomic layer deposition for robust crude-oil-repellent hierarchical nano-armored membranes

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Science Bulletin 2024年第2期69卷 218-226页

作者： xiaobin yang pan Sun yajie Wen Anil U.Mane Jeffrey W.elam Jun Ma Shaomin Liu Seth B.Darling Lu Shao MIIT Key Laboratory of Critical Materials Technology for New energy Conversion and Storage State Key Laboratory of Urban Water Resource and EnvironmentSchool of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001China Chemical Sciences and engineering Division Argonne National LaboratoryLemont IL 60439USA Applied Materials Division Argonne National LaboratoryLemont IL 60439USA Advanced Materials for energy-Water Systems energy Frontier Research Center Argonne National LaboratoryLemont IL 60439USA Pritzker School of Molecular engineering University of ChicagoChicago IL 60637USA Department of Physics University of Ilinois at ChicagoChicago IL 60607USA School of environment Harbin Institute of TechnologyHarbin 150090China WA School of Mines:Minerals Energy and Chemical EngineeringCurtin UniversityPerth WA 6845Australia

Atomic layer deposition(ALD)offers unique capabilities to fabricate atomically engineered porous materials with precise pore tuning and multi-functionalization for diverse applications like advanced membrane separations towards sustainable energy-water ***,current ALD technique is inhibited on most non-polar polymeric membranes due to lack of accessible nucleation ***,we report a facile method to efficiently promote ALD coating on hydrophobic surface of polymeric membranes via novel protein activation/*** a proof of concept,TiO2 ALD-coated membranes activated by bovine serum albumin exhibit remarkable superhydrophilicity,ultralow underwater crude oil adhesion,and robust tolerance to rigorous environments including acid,alkali,saline,and *** importantly,excellent cyclable crude oil-in-water emulsion separation performance can be *** mechanism for activation/sensitization is rooted in reactivity for a particular set of amino ***,the universality of protein-sensitized ALD is demonstrated using common egg white,promising numerous potential usages in biomedical engineering,environmental remediation,lowcarbon manufacturing,catalysis,and beyond.

关键词： Membrane separation Atomic layer deposition Water treatment Antifouling