材料期刊网

MICROSTRUCTURE OF RAPIDLY SOLIDIFIED TiAl ALLOY POWDER

CAO Mingzhou HAN Dong ZHANG Tao LI Dong Institute of Metal Research , Academia Sinica , Shenyang , China Associate Professor , Institute of Metal Research , Academia Sinica , Shenyang 110015 , China

金属学报(英文版)

The rapidly solidified powder of Ti-34Al-2Mn alloy was obtained by means of ultrasonic gas atomisation (USGA) technique.The tupical size of the powder is 27 μm.X-ray diffraction results show that the powder consists of major α_2-phase and minor γ-phase.Under optical microscope both equiaxed and dendritical microstructure features were observed on RS pow- der sections.After annealing at 900 ℃/for 2 h in vacuum,most of α_2-phase transforms into γ-phase,resulting in refinement of structure.

关键词: repid solidification , null , null

A special structure in Al-Mg-Li alloy (01420) weld metal

材料科学技术（英文）

A large quantity of laminated fine grain zones were observed in the Al-Mg-Li alloy weld metal by manual TIG, which was not found in ordinary Al alloy welds. The fine grain zone is formed because of the Al-3(Zr,Ti) particles in the filler metal and the manual filling of filler metal in welding process.

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MICROSTRUCTURE AND PROPERTIES OF SiC_w/6061Al COMPOSITE The Author is now with Institute of Metal Research,Academia Sinica,China

MA Zongyi YAO Zhongkai Harbin Institute of Technology , Harbin , China

金属学报(英文版)

The SiC_w/Al composite prepared by squeeze casting has a combination of superior room temperature specific strength and modulus together with excellent thermal properties.The extrusion can make an improvement on the strength and ductility of the composite from 582 MPa as squeeze casted up to 639 MPa,and on the transformation from isotropic to the anisotropic structure.This seems to be explained by the orientation of whiskers and the densification of dislocations in matrix.TEM observation indicates that the stacking fault is the usual planar defect on the SiC_w surface. composite;;SiC whisker;;Al alloy;;microstructure

关键词: composite , null , null , null

Luoyang Institute of Refractories Research Ministry of Metallurgical Industry

ZHONG Xiangchong Luoyang Institute of Refractories Research , Luoyang , China.

材料科学技术（英文）

关键词:

Discovery and Research of High Tc Superconductor in the Institute of Physics, Academia Sinica

CHEN Liquan A special member of CCAST (World Laboratory) , Post Address: Institute of Physics , Academia Sinica , P.O. Box. 603. Beijing , China.

材料科学技术（英文）

关键词:

Catalytically enhanced dehydrogenation of Li-Mg-N-H hydrogen storage material by transition metal nitrides

Journal of Alloys and Compounds

Motivated by the understanding of dehyrogenation/rehydrogenation reaction mechanisms, we examine the effect of two commercial transition metal nitrides. TaN and TiN, oil the dehydrogenation performance of Li-Mg-N-H system. Both nitrides are catalytically active for accelerating the dehydrogenation reaction of this system. Such catalytic enhancement well persists without hydrogen capacity loss. A catalytic mechanism is proposed Willi reference to the catalytic, model for hydrotreating reactions by transition metal nitrides. (c) 2008 Elsevier B.V. All rights reserved.

关键词: Hydrogen absorbing materials;Nitride materials;molybdenum nitride;system;improvement;catalysts;mechanism;mixtures;hydride;imides;amide;linh2

Technical note: Research and development of localized corrosion rate monitoring instrument for nonpassivable metal in corrosive media

Corrosion

This paper introduces the design of a localized corrosion rate monitoring instrument that can monitor and evaluate the maximum and stable localized corrosion rate of a nonpassivable metal in a corrosive environment by measuring the current density in a corrosion sensor with an occluded anode.

关键词: instrument;localized corrosion rate;monitor

CSD-La3TaO7薄膜外延生长行为

王耀 , 李成山 , 于泽铭 , 冯建情 , 金利华 , 王辉 , 张平祥

稀有金属

研究CSD技术制备La3TaO7 (LTO)缓冲层过程中前驱液的热分解行为以及热处理工艺对薄膜取向生长的影响,通过选取恰当的LTO前驱液以及快速升温热处理的方法最终获得了良好c轴织构的LTO薄膜.

关键词: 涂层导体 , 缓冲层 , 化学溶液沉积

Li2O对CaO基钢包渣系脱磷能力影响的热力学研究

王宏明 , 李桂荣

上海金属 doi:10.3969/j.issn.1001-7208.2002.06.003

渣金平衡实验表明Li2O替代CaO基钢包渣系中等量CaO使渣系磷酸盐容量Cp提高.在此基础上进行钢液脱磷的工艺性实验,研究了Li2O含量、渣系碱度及氧化性对渣系脱磷能力的影响,并给出了控制转炉钢液在钢包中回磷及钢包渣脱磷的渣系.

关键词: CaO基渣系 , Li2O脱磷渣 , 脱磷 , 热力学

添加BaO和Li2O对CaO基脱硫精炼渣熔点和粘度的影响

祝贞学 , 戴起勋 , 李桂荣 , 王宏明 , 徐明喜

上海金属 doi:10.3969/j.issn.1001-7208.2005.05.005

以CaO-SiO2(22.4%)-Al2O3(11.6％)-CaF2(10％)精炼渣作为基础渣系, 添加BaO或Li2O,固定(CaO+BaO或Li2O)/SiO2=2.5,研究渣系熔点和粘度等熔体特性的变化.结果显示加入BaO、Li2O可以明显降低渣系的熔点和粘度,有效改善渣钢反应的动力学条件.当(BaO,Li2O)=15wt％时,熔渣的熔点分别为1267℃和1185℃,远低于作对比的基础渣的熔点1326℃,当温度为1475℃时,熔渣粘度分别为0.98Pa·s和0.51 Pa·s,远小于基础渣的粘度1.79Pa·s,使渣系具有良好的流动性,将显著提高炼钢精炼渣的精炼性能.

关键词: CaO基熔渣 , BaO , Li2O , 熔点 , 粘度