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Sintering, microstructural, radiographic, and strength characterization of a high-purity Si3N4-based compositionA commercially available high purity alpha-Si3N4 powder (UBE SN-E10) was characterized, milled with additives, and sintered in a high-pressure nitrogen atmosphere at temperatures ranging from 1750 to 2140 C. The composition selected for this study has been previously examined using a different alpha-Si3N4 powder. Densification behavior, microstructure characteristics, X-radiographic appearance, room- and high-temperatures flexural strength, and fracture-initiating flaw sites were determined. The high-temperature flexural strengths significantly exceeded those observed in the earlier studies using an identical composition (different alpha-Si3N4 powder) and similar processing techniques.
Document ID
19870025665
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Kiser, J. D. (NASA Lewis Research Center Cleveland, OH, United States)
Sanders, W. A. (NASA Lewis Research Center Cleveland, OH, United States)
Mieskowski, D. M. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
August 13, 2013
Publication Date
August 1, 1986
Publication Information
Publication: Ceramic Engineering and Science Proceedings
Volume: 7
ISSN: 0196-6219
Subject Category
Nonmetallic Materials
Accession Number
87A12939
Distribution Limits
Public
Copyright
Other

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