Physical and mechanical properties of single crystals of the Mo5Si3C phase

被引：19
作者：
Hayashi, T
Ito, K [1 ]
Tanaka, K
机构：
[1] Kagawa Univ, Dept Adv Mat Sci, Fac Engn, Takamatsu, Kagawa 7610396, Japan
[2] Kyoto Univ, Dept Mat Sci & Engn, Kyoto 6068501, Japan
来源：
INTERMETALLICS | 2003年 / 11卷 / 08期
关键词：
intermetallics; miscellaneous; mechanical properties at high temperatures; elastic properties; thermal properties;
D O I：
10.1016/S0966-9795(03)00086-4
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：
High purity single crystals of the Mo5Si3C phase with the D8(8) type structure have been grown and their physical and mechanical properties have been measured. The composition of single crystals is Mo4.66Si3.00C0.402. Lattice constants of the compound are a = 0.7286 nm and c = 0.5046 nm. Vickers micro-hardness and fracture toughness are 13.4 MPa and 1.3 MPa m(1/2), respectively. The anisotropy ratio of thermal expansion coefficient (alpha(c)/alpha(a)) of the compound is approximately 2 at 773 K. In contrast, the elastic properties for the compound are nearly isotropic. The deformation behavior of the compound has been studied in compression using [0001], [1340] [2249] oriented single crystals. These single crystals can be deformed plastically at temperatures higher than 1573 K. Slip occurs on {0001} <11 (2) over bar0> and an unidentified non-basal system. (C) 2003 Elsevier Ltd. All rights reserved.
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页码：835 / 840
页数：6
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