简介概要

Microstructures and Mechanical Property of MoSi2/TSi2(T=Cr,V,Nb,Ta,Ti)Two-Phase Alloys

来源期刊:材料科学与工程学报2000年增刊第2期

论文作者:Yoshisato Kimura Yoshinao Mishima Fu-Gao Wei

关键词:Phase stability; phase diagram; lamellar structure; lattice parameter; microhardness;

摘    要:In order to improve the low temperature ductility and high temperature strength ofMoSi2 while keeping its superior high temperature oxidation resistance, the present work attempts to combine MoSi2with the C40 type disilicides of transition metals including Cr, V, Nb, Ta and Ti. The possibility of producing a thermally compatible composite of MoSi2 and the C40 disilicides is discussed by critical assessment of MoSi2-TSi2(T=Cr, V,Nb,Ta, Ti) pseudo-binary phase diagrams. Relative phase stability between the CIIb MoSi2 and the C40 TSi2 is investigated and lamellar MoSi2/TSi2 two-phase microstructures are obtained by appropriate choice of composition and heat-treament. Preliminary result on the microhardness of MoSi2/TSi2two-phase alloys is also discussed.

详情信息展示

Microstructures and Mechanical Property of MoSi2/TSi2(T=Cr,V,Nb,Ta,Ti)Two-Phase Alloys

Yoshisato Kimura1,Yoshinao Mishima1,Fu-Gao Wei1

(1.Department of Materials Science and Engineering,Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8502, Japan)

摘要:In order to improve the low temperature ductility and high temperature strength ofMoSi2 while keeping its superior high temperature oxidation resistance, the present work attempts to combine MoSi2with the C40 type disilicides of transition metals including Cr, V, Nb, Ta and Ti. The possibility of producing a thermally compatible composite of MoSi2 and the C40 disilicides is discussed by critical assessment of MoSi2-TSi2(T=Cr, V,Nb,Ta, Ti) pseudo-binary phase diagrams. Relative phase stability between the CIIb MoSi2 and the C40 TSi2 is investigated and lamellar MoSi2/TSi2 two-phase microstructures are obtained by appropriate choice of composition and heat-treament. Preliminary result on the microhardness of MoSi2/TSi2two-phase alloys is also discussed.

关键词:Phase stability; phase diagram; lamellar structure; lattice parameter; microhardness;

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