材料期刊网

Flexible Oxide-Based Thin-Film Transistors on Plastic Substrates for Logic Applications

Jin Zhang , Yanghui Liu , Liqiang Guo , Ning Liu , Hui Xiao , Changqing Chen , Guodong Wu

材料科学技术（英文）

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Effects of Zn, Zn-Al and Zn-P Additions on the Tensile Properties of Sn-Bi Solder

Xiaojing Wang , Yanlai Wang , Fengjiang Wang , Ning Liu , Jianxin Wang

金属学报(英文版) doi:10.1007/s40195-014-0165-9

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Electric transport mechanism and magnetoresistance of La0.80Sr0.15Ag0.05MnO3/x(CuO)

Peng Liu , Gui-Ying Wang , Qiang Mao , Ning Liu , Zhen-Sheng Peng

稀有金属 doi:10.1007/s12598-014-0385-1

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Improving the electrochemical properties of natural graphite spheres by coating with a pyrolytic carbon shell

新型炭材料

Two kinds of modified natural graphite (MNG) spheres with a pyrolytic carbon shell on smooth or granular surface were obtained using fluidized bed chemical vapor deposition of acetylene by adjusting the reaction parameters. The core of the NING has a highly ordered graphite structure and the shell has a disordered structure. Compared with natural graphite (NG) spheres, MNG with a core-shell structure shows improved first cycling efficiency and cyclability. Especially, the NING spheres with a granular surface possess 84% retention of the first discharge capacity after 41 cycles, owing to effective decrease of the contact resistance and increase of contact area between the NING spheres.

关键词: fluidized bed chemical vapor deposition;core-shell structure;pyrolytic;carbon;modified natural graphite;lithium ion secondary battery;lithium-ion batteries;chemical-vapor-deposition;1st-cycle charge loss;anode material;encapsulated graphite;surface-area;infiltration;performance;improvement;pyrocarbon

复合材料层合壳体的三维本构方程

杨宜谦

玻璃钢/复合材料 doi:10.3969/j.issn.1003-0999.1999.04.002

本文推导出了复合材料层合壳体的三维本构方程,修正了Reddy和Liu论文中的错误.

关键词: 复合材料 , 壳体 , 三维本构方程

聚醛/蒙脱土纳米复合材料非等温结晶动力学研究

徐卫兵 , 戈明亮 , 何平笙

应用化学 doi:10.3969/j.issn.1000-0518.2001.09.011

用熔融插层法制备聚甲醛/蒙脱土纳米复合材料,用X射线衍射研究聚甲醛及复合材料的微观结构,表明复合材料是纳米复合材料.用DSC法研究其非等温结晶行为,对所得数据分别用Jeziorny法、Ozawa法和Liu法进行处理.结果表明,Jeziorny法和Liu法处理非等温结晶过程比较理想.聚甲醛及聚甲醛/有机蒙脱土纳米复合材料的结晶活化能分别为334.6和196.9 kJ/mol,说明有机蒙脱土的加入,降低了聚甲醛的结晶活化能,且t1/z缩短,起到了异相成核的作用.

关键词: 聚甲醛 , 蒙脱土 , 纳米复合材料 , 非等温结晶动力学

聚丙烯/凹凸棒土纳米复合材料的非等温结晶动力学

王平华 , 徐国永

应用化学 doi:10.3969/j.issn.1000-0518.2004.08.007

用熔融复合法制备聚丙烯/凹凸棒土纳米复合材料,用DSC法研究其非等温结晶行为,对所得的数据分别用Jeziorny法、Ozawa法和Liu法进行处理.结果表明,Jeziorny法和Liu法处理非等温结晶过程比较理想.聚丙烯及聚丙烯/凹凸棒土纳米复合材料的结晶活化能分别为194.1和162.8 kJ/mol,表明凹凸棒土的加入,降低了聚丙烯的结晶活化能,且t1/2缩短,起到了异相成核作用.

关键词: 聚丙烯 , 凹凸棒土 , 纳米复合材料 , 非等温结晶动力学

Reply to Comments on "Interdiffusion in the beta phase region of the Ni-Al-Cr system"

Scripta Materialia

A recent comment on a previously published paper addressed the invalid explanation of the off diagonal interdiflusion coefficients of the beta-Ni(Al,Cr) phase in the Ni-Cr-Al system according to the symmetric property of the thermodynamic matrix. In this paper, the experimental data presented by Hou et al. was reanalyzed and the interdiffusion coefficient matrix was estimated again. The results of the analysis have been discussed in terms of a brief reply to the comments of Liu and Liang. (C) 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

关键词: Diffusion;Intermetallic compound;Ni-Cr-Al

PET-PEE/ATO纳米复合材料的非等温结晶动力学

邓超 , 邵玮 , 李春忠

高分子材料科学与工程

采用元机纳米锑掺杂二氧化锡(ATO)和有机聚醚酯(PEE)协同提高聚时苯二甲酸乙二酯(PET)的抗静电性能,合成了聚对苯二甲酸乙二酯-聚醚酯/锑掺杂二氧化锡纳米复合材料(PET-PEE/ATO).使用Czawa方程和Liu-Mo方程研究了PET-PEE/ATO纳米复合材料的非等温结晶过程.Ozawa方程研究发现,在非等温结晶过程中,PET、PET-PEE、PET/ATO、PET-PEE/ATO的成核性能依次提高.Liu-Mo方程发现,ATO和PEE的加入分别促进了异相成核作用和加快了结晶生长,PET-PEE/ATO结晶成核性能最好,结晶速率最快.

关键词: 聚对苯二甲酸乙二酯 , 有机聚醚酯 , 无机纳米锑掺杂二氧化锡 , 纳米复合材料 , 非等温结晶动力学

STUDIES ON PRIMARY CRYSTALLIZATION OF RAPIDLY QUENCHED Al-Ni-Cu-Nd METALLIC GLASS BY USING HIGH RESOLUTION TRASMISSION ELECTRON MICROSCOPY

Y.D.Xiao , W.X.Li , D.Jacovkis , M.T.Clavaguera-Mora , J.Rodriguez-Viejo , N.Clavaguera

金属学报(英文版)

Rapidly solidified Al87Ni7Cu3Nd3 metallic glasses, prepared by using melt spinning, were treated under both isothermal and non-isothermal regime. The amorphous rib-bon and the annealed samples were closely examined by means of differential scan-ning calorimetric, conventional X-ray diffraction and high resolution transmission electron microscopy with selected-area electron diffraction, with special interest in pri-mary crystallization into α-Al nanocrystalline particles, in order to understand struc-tural characteristics of Al-based amorphous/nanocrystalline alloys, and nucleation and grain growth mechanism on the nanometer scale during primary crystallization. The results show that, the as-prepared ribbons are fully amorphous and homogeneous in the micron scale, but contain high density of quenched-in clusters or crystallite embryos. Primary crystallization mainly leads to formation of two-phase mixture of α-Al crystal and residual amorphous phase. The annealed ribbons exposed isother-mally at 110℃ for 5, 130 minutes and heated continuously up to less than 310℃ at 40℃/min consist of large amount of α-Al fec crystal nanoparticles dispersed uni-formly in an amorphous matrix. However, a very little amount of finer orthorhombic Al3Ni intermetalics particles exist in the annealed ribbons heated up to 310℃. During primary crystallization, the leading kinetic mechanics to impede growth of the α-Al crustal is soft impinaement, instead of geometric impinqement.

关键词: rapid solidification , null , null