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Improved performance of silicon nitride-based high temperature ceramicsRecent progress in the production of Si3N4 based ceramics is reviewed: (1) high temperature strength and toughness of hot pressed Si3N4 were improved by using high purity powder and a stabilized ZrO2 additive, (2) impact resistance of hot pressed Si3N4 was increased by the use of a crushable energy absorbing layer, (3) the oxidation resistance and strength of reaction sintered Si3N4 were increased by impregnating reaction sintered silicon nitride with solutions that oxidize to Al2O3 or ZrO2, (4) beta prime SiA1ON compositions and sintering aids were developed for improved oxidation resistance or improved high temperature strength.
Document ID
19780002351
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Ashbrook, R. L. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 3, 2013
Publication Date
January 1, 1977
Subject Category
Nonmetallic Materials
Report/Patent Number
NASA-TM-73719
E-9268
Report Number: NASA-TM-73719
Report Number: E-9268
Meeting Information
Meeting: Mater. Show and Conf.
Location: Chicago
Start Date: October 25, 1977
End Date: October 27, 1977
Sponsors: ASM
Accession Number
78N10294
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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