f O SR-TR- I 04 U COPY iORRio SOUTHWEST RESEARCH INSTITUTE Post Office Drawer 28510, 6220 Culebra Road San Antonio, Texas 78228-0510 I- STUDY OF HIGH TEMPERATURE 0 FAILURE MECHANISMS IN CERAMICS N Richard A. Page ELECTE James Lankford JAN 0 9 1991 Kwai S. ChanB0 AFOSR ANNUAL REPORT This research was sponsored by the Air Force Office of Scientific Research, Electronic and Materials Sciences Directorate Under Contract F49620-88-C-0081 Approved for release; distribution unlimited. November 1990 Approved: Gerald R. Leverant, rec Department of Materials and Mechanics 91 1 9 012