Effects of alloying elements on plastic deformation of single crystals of MoSi2

被引：76

作者：

Inui, H ^{[1
]}

Ishikawa, K ^{[1
]}

Yamaguchi, M ^{[1
]}

机构：

[1] Kyoto Univ, Dept Mat Sci & Engn, Sakyo Ku, Kyoto 6068501, Japan

来源：

INTERMETALLICS | 2000年 / 8卷 / 9-11期

基金：

日本学术振兴会;

关键词：

molybdenum silicides; plastic deformation mechanisms; solid-solution hardening; defects : dislocation geometry and arrangement; electron microscopy; transmission;

D O I：

10.1016/S0966-9795(00)00049-2

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Effects of alloying elements on the compression deformation behavior of single crystals of MoSi2 have been investigated in the temperature range from room temperature to 1500 degreesC. The alloying elements studied include V, Cr, Nb and Al that form a C40 disilicide with Si and W and Re that form a Glib disilicide with Si. The addition of Al is found to decrease the yield strength of MoSi2 at all temperatures while the additions of V, Cr and Nb are found to decrease the yield strength at low temperatures (below 800 degreesC) and to increase the yield strength at high temperatures (above 1300 degreesC). In contrast, the additions of W and Re (C11(b) formers) are found to increase the yield strength at all temperatures. Of the ternary elements investigated, Al and Nb seem to be the most effective in improving the low-temperature deformability of MoSi2 while Re and Nb seem to be the most effective in improving the high-temperature strength, judging from the observed yield strength. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：1131 / 1145

页数：15

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