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Thermal effects on the mechanical properties of SiC fibre reinforced reaction-bonded silicon nitride matrix compositesThe elevated temperature four-point flexural strength and the room temperature tensile and flexural strength properties after thermal shock were measured for ceramic composites consisting of 30 vol pct uniaxially aligned 142 micron diameter SiC fibers in a reaction bonded Si3N4 matrix. The elevated temperature strengths were measured after 15 min of exposure in air at temperatures to 1400 C. Thermal shock treatment was accomplished by heating the composite in air for 15 min at temperatures to 1200 C and then quenching in water at 25 C. The results indicate no significant loss in strength properties either at temperature or after thermal shock when compared with the strength data for composites in the as-fabricated condition.
Document ID
19900059944
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Bhatt, R. T. (U.S. Army, Propulsion Directorate, Cleveland OH, United States)
Phillips, R. E. (NASA Lewis Research Center; Sverdrup Technology, Inc. Cleveland, OH, United States)
Date Acquired
August 14, 2013
Publication Date
July 1, 1990
Publication Information
Publication: Journal of Materials Science
Volume: 25
ISSN: 0022-2461
Subject Category
COMPOSITE MATERIALS
Distribution Limits
Public
Copyright
Other