R-CURVE BEHAVIOR IN ZIRCONIA-REINFORCED MOLYBDENUM DISILICIDE COMPOSITES

被引：34
|
作者：
BHATTACHARYA, AK
PETROVIC, JJ
机构：
[1] Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico
来源：
JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 1992年 / 75卷 / 01期
关键词：
R-CURVE; MOLYBDENUM; SILICIDES; ZIRCONIA; FRACTURE TOUGHNESS;
D O I：
10.1111/j.1151-2916.1992.tb05436.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：
R-curves for hot-pressed 20 vol% ZrO2 (2.5-YPSZ and 8-YPSZ) reinforced MoSi2 composites were evaluated using the indentation/bend technique. Results indicated a modest increase in the material toughness for both composites. Experimental R-curves were compared with theoretically predicted R-curves to evaluate the critical transformation stress for the partially stabilized ZrO2 composite. A high critical transformation stress value obtained was indicative of the inhibition of transformation toughening effects due to microstructural inhomogeneity in the partially stabilized ZrO2-MoSi2 composites.
引用
收藏
页码：23 / 27
页数：5
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