R‐Curve Behavior in Zirconia‐Reinforced Molybdenum Disilicide Composites
作者:
Arun K. Bhattacharya,
John J. Petrovic,
期刊:
Journal of the American Ceramic Society
(WILEY Available online 1992)
卷期:
Volume 75,
issue 1
页码: 23-27
ISSN:0002-7820
年代: 1992
DOI:10.1111/j.1151-2916.1992.tb05436.x
出版商: Blackwell Publishing Ltd
关键词: R‐curve;molybdenum;silicides;zirconia;fracture toughness
数据来源: WILEY
摘要:
R‐curves for hot‐pressed 20 vol% ZrO2(2.5‐YPSZ and 8‐YPSZ) reinforced MoSi2composites were evaluated using the indentation/bend technique. Results indicated a modest increase in the material toughness for both composites. ExperimentalR‐curves were compared with theoretically predictedR‐curves to evaluate the critical transformation stress for the partially stabilized ZrO2composite. 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‐Mo
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