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Distinct Electrical and Mechanical Responses of a cu-10Fe composite Prepared by Hot-Pressed Sintering and Post Treatment

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Acta Metallurgica Sinica(English Letters) 2024年第2期37卷 255-265页

作者： x.Y.Yue S.Y.Peng x.Zhang c.N.He Y.Z.Tian Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education) School of Materials Science and EngineeringNortheastern UniversityShenyang110819China School of Materials Science and Engineering and Tianjin Key Laboratory of composite and Functional Materials Tianjin UniversityTianjin300350China Research centre for Metallic Wires Northeastern UniversityShenyang110819China

A cu-10wt%Fe composite was prepared through hot-pressed sintering,and the material was subsequently solution *** hot-pressed sintered and solution treated materials were rolled and *** precipitation behavior and performance changes were systematically studied by using scanning electron microscopy and transmission electron *** contrast to the hot-pressed sintered specimen,the solution treatment significantly affects the thermal stability and properties of the cu-10wt%Fe *** cu-10wt%Fe composite was prepared after solid solution,cold rolling and aging at 773 K for 1 h,and it obtained excellent tensile strength of 494 MPa,uniform elongation of 16.3%,electrical conductivity of 51.1%IAcS and softening temperature of 838 *** for the distinct difference in thermal stability and properties between hot-pressed sintered and solution treated specimens were *** findings provide a theoretical basis for designing high-performance cu-based in-situ composites by post treatment.

关键词： cu-Fe composite Hot-pressed sintering Thermal stability Strength Electrical conductivity

Novel ternary Ag/ceVO_4/g-c_3N_4 nanocomposite as a highly efficient visible-light-driven photocatalyst

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Journal of Advanced ceramics 2018年第1期7卷 50-57页

作者： J.REN Y.Z.WU J.M.PAN x.H.YAN M.cHEN J.J.WANG D.F.WANG c.ZHOU Q.WANG x.N.cHENG School of Materials Science and Engineering Jiangsu University Institute for Advanced Materials Jiangsu University Institute of Green Materials and Metallurgy Jiangsu University

The ceVO_4/graphitic c_3N_4 composites have exhibited much enhanced photocatalytic property for degrading methylene blue(MB) pollutant under visible light irradiation compared with single-phase g-c_3N_4 or ceVO_4. The composite S5 obtained from an optimized mass ratio(5%) of ceVO_4 to dicyanamide(DcDA) exhibits the highest photocatalytic activity. Here, ternary Ag/ceVO_4/g-c_3N_4 composites denoted as x%Ag/S5 were prepared by an ultrasonic precipitation method to improve the photocatalytic property of S5. The TEM images show that ceVO_4 and Ag nanoparticles are well distributed on the layered g-c_3N_4, which agree well with the xRD results. The UV spectra show that the 7%Ag/S5 sample has the widest absorption range and the enhanced absorption intensity under visible light irradiation. The corresponding band gap of 7%Ag/S5(2.5 eV) is much lower than that of S5(2.65 eV). The corresponding k value of 7%Ag/S5 is much higher than those of g-c_3N_4 and ceVO_4. The degradation experiments for MB solution suggest that the 7%Ag/S5 sample has the optimal photocatalytic performance, which can degrade MB solution completely within 120 min. The enhanced photocatalytic property of the composites is ascribed to not only the effect of heterojunction structure, but also the surface plasma resonance effect of Ag nanoparticles.

关键词： g-c3N4 ceVO4 Ag nanocomposites photocatalytic performance

PLASMA SPRAYED Ti AND HA cOATINGS: A cOMPARATIVE STUDY BETWEEN APS AND VPS

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Acta Metallurgica Sinica(English Letters) 2005年第3期18卷 339-344页

作者： x.B.Zheng H.Ji J.Q.Huang c.x.Ding ShanghaiInstituteofceramics TheChineseAcademyofSciencesShanghai200050China

Titanium (Ti) and hydroxyapatite (HA) coatings have been prepared via air (APS) and vacuum plasma spraying (VPS), and then their composition, structure, bonding strength and bioactivity were examined. The results obtained reveal that in APS process many of Ti were oxidized, but in VPS the oxidization was avoided. VPS T i coating possesses better bonding condition than APS Ti coating. As for HA coat ing, higher crystallinity has been obtained while the coating was deposited by V PS as compared with APS. The simulated body fluid (SBF) tests show that both of APS and VPS HA coatings possess good bioactivity. As compared with APS, VPS is r ecommended as a better method to deposit Ti and HA coatings that can be applied as hard tissue replacement implants.

关键词： vacuum plasma spray Ti HA biocoating

In vivo imaging of structural,metabolic and functional brain changes in glaucoma

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Neural Regeneration Research 2019年第3期14卷 446-449页

作者： Anisha Kasi Muneeb A.Faiq Kevin c.chan NYU Langone Eye center Department of Ophthalmology NYU School of Medicine NYU Langone Health New York University Department of Radiology NYU School of Medicine NYU Langone Health New York University center for Neural Science Faculty of Arts and Science New York University

Glaucoma, the world's leading cause of irreversible blindness, is a condition for which elevated intraocular pressure is currently the only modifiable risk factor. However, the disorder can continue to progress even at reduced intraocular pressure. This indicates additional key factors that contribute to the etiopathogenesis. There has been a growing amount of literature suggesting glaucoma as a neurodegenerative disease of the visual system. However, it remains debatable whether the observed pathophysiological conditions are causes or consequences. This review summarizes recent in vivo imaging studies that helped advance the understanding of early glaucoma involvements and disease progression in the brains of humans and experimental animal models. In particular, we focused on the non-invasive detection of early structural and functional brain changes before substantial clinical visual field loss in glaucoma patients; the eye-brain interactions across disease severity; the metabolic changes occurring in the brain's visual system in glaucoma; and, the widespread brain involvements beyond the visual pathway as well as the potential behavioral relevance. If the mechanisms of glaucomatous brain changes are reliably identified, novel neurotherapeutics that target parameters beyond intraocular pressure lowering can be the promise of the near future, which would lead to reduced prevalence of this irreversible but preventable disease.

关键词： glaucoma intraocular pressure eye-brain-behavior relationship irreversible blindness magnetic resonance imaging metabolic brain changes sensitivity disease progression

Integrated waste and water management in mining and metallurgical industries

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中国有色金属学会会刊：英文版 2008年第6期18卷 1497-1505页

作者： B.K.c.chan S.BOUZALAKOS A.W.L.DUDENEY Department of Earth Science and Engineering Imperial College centre for Innovation in carbon capture and Storage(cIccS) University of Nottingham

引得出的操作通常共同生产不能出售的材料(矿物质浪费) 的大数量。增强的费用和世界范围的规定为如此的浪费的减小和复用加亮增加的需要。现在的纸为固体和水介绍一个新综合浪费管理计划。计划被连接到硫醚筹款集中的金属处理的 biohydr... 详细信息

引得出的操作通常共同生产不能出售的材料(矿物质浪费) 的大数量。增强的费用和世界范围的规定为如此的浪费的减小和复用加亮增加的需要。现在的纸为固体和水介绍一个新综合浪费管理计划。计划被连接到硫醚筹款集中的金属处理的 biohydrometallurgical 的合成废物和过程水的新奇处理例示。硫醚的 Bioleaching 专注导致稳固的废物的二种类型：ferrihydrite/gypsum 从 bioleach 白酒和未沥滤的脉石的中立状态猛抛。纸显示那，依赖部件包含了的未成年者，在混合的稳固的阶段可能有用地在产品的三种类型之中被散布：常规地下的装填， cemented 土木工程装填(特别地控制的低力量材料或 cLSM ) 和生产土壤。包含模仿的矿物质废物强调 cLSM，证明如此的材料能展出力量，孔和渗透的要求的特征。什么时候有毒的部件，例如，从倔强的金矿石的砷，是在场的，封装将被要求。过程水典型地被再循环远及可能，尽管任何过量以前应该被对待，再使用或排出。纸也由反向的渗透(能通常移开溶解部件的很少方法之一) 加亮处理，特别地在氧化状态 +6 显示出那砷能乐意地为分泌物被移开(<

关键词：置换沉淀废物处理生物浸取金矿

xMT enabled prediction of structure and permeability of flocculated structures and sediments

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2005年第12期6卷 1367-1373页

作者： WILLIAMS R.A. SELOMULYA c. JIA x. Institute of Particle Science ＆ Engineering School of Process Environmental ＆ Materials Engineering University of Leeds Leeds LS2 9JT UK ARc centre for Functional Nanomaterials School of Chemical Engineering ＆ Industrial Chemistry University of New South Wales Sydney NSW 2052 Australia

3D visualisations of the microstructure of flocculated particulates and sediments using optical confocal laser mi- croscopy and high resolution x-ray microtomography (xMT) methods are described. Data obtained from in-situ measurements should enable direct computation of the properties of solids assembly (shape, size, contact area) and their permeability to fluids. A specific application relating to the formation of silica aggregates is described from which the behaviour of sediments containing these materials can be predicted on the basis of a bench-top test and the use of a Lattice Boltzman simulation. It is proposed that the method can potentially be used to predict trends such as the filtration behaviour of porous structures under different states of compression. This offers a significant benefit in assisting the formulation design of flocculated materials pertinent to a number of industrial sectors wishing to design optimal filtration or relevant operations.

关键词： Fluid flow Imaging Microstructure Porous media Visualization Tomography

The Novel Mechanical Property of Tongue of a Woodpecker

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Journal of Bionic Engineering 2009年第3期6卷 214-218页

作者： P Zhou x Q Kong c W Wu Z chen National Key Laboratory for Structural Analysis of Industrial Equipment Dalian University of Technology Department of civil and Environmental Engineering University of Missouri

Biomaterials such as bone,teeth,nacre and silk are known to have superior mechanical properties due to their specific nanocomposite *** we report that the woodpecker's tongue exhibits a novel strength and flexibility due to its special composite micro/*** tongue consists of a flexible cartilage-and-bone skeleton covered with a thin layer tissue of high strength and *** the interface between the cartilage-and-bone skeleton and the tissue layer,there is a hierarchical fiber-typed *** is this special design of the tongue that makes the woodpeckers efficient in catching the insects inside *** special micro/nanostructures of the woodpecker's tongue show us a potential method to enhance the interfacial connection between soft and hard material layers for bio-inspired composite system designs.

关键词： woodpeckcr hyoid cartllage multilevel structure tensile strength

A Modified Glass Formation criterion for Various Glass Forming Liquids with Higher Reliability

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chinese Physics Letters 2007年第5期24卷 1335-1338页

作者： x. H. Du J. c. Huang Institute of Materials Science and Engineering National Sun Yat-Sen University Kaohsiung 804 Department of Materials Engineering Shenyang Institute of Aeronautical Engineering Shenyang 110034

A modified indicator of the glass forming ability （GFA） from the previous 7 = Tx/（Tl ＋ Tg） for various glass forming liquids is proposed based on a conceptual approach which combines more acceptable physical metallurgy views in terms of the time-temperature-transformation diagrams. It is found that the glass forming ability for glass forming liquids is closely associated mainly with two factors, i.e. （2Tx - Tg） and Tl （wherein Tx is the onset crystallization temperature, Tg the glass transition temperature, and Tl the liquidus temperature）, and could be predicated by a unified parameter γm defined as （2Tx - Tg）/Tl. This approach is confirmed and validated by experimental data in various glass forming systems including oxide glasses, cryoprotectants and metallic glasses, which all shows a higher reliability when their glass forming ability is predicted by the modified parameter.

关键词： BULK METALLIc GLASSES ABILITY ALLOYS STABILITY SYSTEMS PARAMETERS FRAGILITY

A mathematical solution for the parameters of three interfering resonances

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chinese Physics c 2018年第4期42卷 62-68页

作者： x. Han c.P. Shen School of Physics and Nuclear Energy Engineering Beihang University Beijing 100191 China

The multiple-solution problem in determining the parameters of three interfering resonances from a fit to an experimentally measured distribution is considered from a mathematical viewpoint. It is shown that there are four numerical solutions for a fit with three coherent Breit-Wigner functions. Although explicit analytical formulae cannot be derived in this case, we provide some constraint equations between the four solutions. For the cases of nonrelativistic and relativistic Breit-Wigner forms of amplitude functions, a numerical method is provided to derive the other solutions from that already obtained, based on the obtained constraint equations. In real experimental measurements with more complicated amplitude forms similar to Breit-Wigner functions, the same method can be deduced and performed to get numerical solutions. The good agreement between the solutions found using this mathematical method and those directly from the fit verifies the correctness of the constraint equations and mathematical methodology used.

关键词： multiple solutions three interfering resonances high energy physics experiments