OXIDATION EMBRITTLEMENT PROBE FOR CERAMIC-MATRIX COMPOSITES

被引:143
|
作者
HEREDIA, FE
MCNULTY, JC
ZOK, FW
EVANS, AG
机构
[1] Materials Department, College of Engineering, University of California, Santa Barbara, California
关键词
D O I
10.1111/j.1151-2916.1995.tb08621.x
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
A test method for probing oxidation embrittlement in ceramic-matrix composites has been devised and demonstrated for three composites: SiC/magnesium aluminosilite, SiC/SiC, and SiC/Al2O3. The method identifies a ''pest'' temperature T-p. The growth of an embrittled region from the surface, at T-p, has been illustrated. The embrittlement mechanism involves oxygen ingress through matrix cracks and silicate formation at the fibers, causing fiber failure.
引用
收藏
页码:2097 / 2100
页数:4
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