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Interaction of molten silicon with silicon aluminum oxynitrides

Journal Article · · J. Am. Ceram. Soc.; (United States)
Silicon aluminum oxynitride solid solutions (sialons) based on ..beta..-Si/sub 3/N/sub 4/ and Si/sub 2/N/sub 2/O behave differently in contact with molten silicon. The Si/sub 2/N/sub 2/O-based sialons convert to almost pure Si/sub 3/N/sub 4/, apparently through a two-step decomposition and solution-precipitation reaction, whereas, the ..beta..-Si/sub 3/N/sub 4/ sialons are preferentially attacked at the grain boundaries. The composition of the grain-boundary phase appears to control the rate of reaction.
Research Organization:
Battelle Columbus Laboratories, OH
OSTI ID:
5203012
Journal Information:
J. Am. Ceram. Soc.; (United States), Journal Name: J. Am. Ceram. Soc.; (United States) Journal Issue: 7-8 Vol. 63:7-8; ISSN JACTA
Country of Publication:
United States
Language:
English