Formation of boron nitride inclusions in hot isostatically pressed silicon nitride-silicon carbide composites
Journal Article
·
· Journal of the American Ceramic Society
- Univ. of Cambridge (United Kingdom). Dept. of Materials Science and Metallurgy
Small graphite-like boron nitride inclusions have been detected, using transmission electron microscopy, in silicon nitride particulate-reinforced silicon carbide composites hot isostatically pressed in tantalum cans. The inclusions are thought to arise indirectly from fine particles of boron nitride sprayed onto the internal surface of the tantalum can to prevent a chemical reaction between the tantalum and the silicon carbide. Boron oxide present on the surface of these particles is able to evaporate and penetrate the powder compacts during hot isostatic pressing and then react with silicon nitride and silicon carbide to form the observed inclusions.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 79781
- Journal Information:
- Journal of the American Ceramic Society, Journal Name: Journal of the American Ceramic Society Journal Issue: 3 Vol. 78; ISSN 0002-7820; ISSN JACTAW
- Country of Publication:
- United States
- Language:
- English
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