材料期刊网

TEMPERATURE DEPENDENCE UPON VISCOSITY OF Ni-P ALLOY ON AMORPHOUS FORMATION

WANG Jingtang PANG Dexing DING Bingzhe BIAN Maoshu LI Shuling Institute of Metal Research , Academia Sinica , Shenyang , China[Originally published in ACTA METALL SIN (CHINESE EDN) 24 (5) 1988 pp B372—B375 , received 25 December 1986 , in revised form 3 September 1987]

金属学报(英文版)

The viscous flow of amorphous alloys near T_gis closely related to the viscosity of liquid alloys. On the basis of the measured surface tension and density for Ni-P binary alloys,the correla- tion between the viscosity of the melt and viscous flow process of the amorphous alloy is inves- tigated.The relationship between viscosity and temperature for Ni-P alloys going from liquid to amorphous solid may be described by the following formula:

关键词: Ni-P amorphous alloy , 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）

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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）

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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

Research on Metal Hydride Compressor System

稀有金属（英文版）

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Two-step magnetization in a spin-chain system on the triangular lattice: Wang-Landau simulation

Physical Review B

The Wang-Landau algorithm is used to study the thermodynamic and magnetic properties of triangular spin-chain system based on two-dimensional Ising model in order to understand the magnetic-order dynamics in Ca(3)Co(2)O(6) compound. The calculated results demonstrate that the equilibrium state of the rigid spins produces the two-step magnetization curve at low temperature even when the random-exchange term is considered. This work indicates that the four-step magnetization behavior observed experimentally must be due to the nonequilibrium magnetization.

关键词: calcium compounds;exchange interactions (electron);Ising model;magnetisation;thermodynamics;one-dimensional ca3co2o6;density-of-states;compound ca3co2o6;phase-diagram;proteins;crystal

Effect of crystallinity on electrochemical insertion/extraction of Li in transition metal oxides - Part II: TiO2, V2O5 and MoO3

Tomoki TSUMURA , Michio INAGAKI

材料科学技术（英文）

Electrochemical insertion/extraction sf Li on cathode materials of anatase type TiO2, quasi-layered structure V2O5 and layered structure MoO3 was measured on samples of which structures were well characterized and showed a wide range of crystallinity. On the basis of experimental results on structure, morphology and charge-discharge characteristics, the effect of crystallinity of the cathode materials on electrochemical Li insertion/extraction performance was discussed. These three transition metal oxides were classified as one group on the basis of whether the crystallinity of these oxides affects to the performance or not, LiMn2O4 and LiCo0.5Ni0.5O2 belongs to the former group and TiO2, V2O5 and MoO3 to the latter.

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