Abstract
The oxidation resistance of SiC–BN composites with different BN content hot-pressed from Si 3N 4, B 4C and C was investigated. The oxidized products of SiC and BN were identified to be SiO 2, C and B 2O 3, N 2. SiO 2 and B 2O 3 could further form a borosilicate glass which covered the surfaces of the samples and withstood oxidation because of its flowability and self-healing. The oxidation resistance of the SiC–BN composites in static air atmosphere deteriorated with the increase of temperature as well as of the BN content.
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