The Interaction of Molten Silicon with Silicon Aluminum Oxynitrides |
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| Authors: | R R WILLS&#; I SEKERCIOGLU&#; D E NIESZ&#; |
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| Affiliation: | Battelle Columbus Laboratories, Columbus, Ohio 43201 |
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| Abstract: | Silicon aluminum oxynitride solid solutions (sialons) based on β-Si3N4 and Si2N2O behave differently in contact with molten sih'con. The Si2N2O-based sialons convert to almost pure Si3N4, apparently through a two-step decomposition and solution-precipitation reaction, whereas the β-Si3N4 sialons are preferentially attacked at the grain boundaries. The composition of the grain-boundary phase appears to control the rate of reaction. |
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