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

页码：23 / 27

页数：5

共 26 条

[1] STEADY-STATE CRACK-GROWTH IN SUPERCRITICALLY TRANSFORMING MATERIALS [J].