Effects of Al additions on the microstructure and mechanical properties of MoSi2

被引：0
|
作者：
Li, JL [1 ]
Jiang, DL [1 ]
Tang, SH [1 ]
机构：
[1] Chinese Acad Sci, Shanghai Inst Ceram, Shanghai 200050, Peoples R China
来源：
PROCEEDINGS OF THE FIRST CHINA INTERNATIONAL CONFERENCE ON HIGH-PERFORMANCE CERAMICS | 2001年
关键词：
D O I：
暂无
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The effects of At additions on the microstructure and mechanical properties Of MoSi2 were studied. With the At additions from 2.5 wt% to 5 wt%, the siliceous grain boundary phase in hot pressed samples was eliminated because of the formation of Al2O3 particles. It is shown that Al and SiO2 will react at 860 degreesC. During the reaction, Al atoms are mainly transferred to Al2O3 particles, and to some extent, diffuse into MoSi2 grains. Both the toughness and strength of Al containing composite exceed those of pure MoSi2 material. Bending strength and fracture toughness reach the highest value of 350 MPa, 4.05 MPam(1/2), respectively, at ambient temperature when Al addition is of 3.5 wt%.
引用
收藏
页码：281 / 284
页数：4
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