Prevention of Oxidation of SiC through Reaction Bonding in the SiC-Mullite Composite System by Using the Technique of Intermediate Gel Formation

Reaction bonding of silicon carbide-mullite composites with varying SiC to mullite ratio is studied. The oxidation of silicon carbide to cristobalite could be controlled by increasing the material that gives mullite after heat treatment. In the present study, the best composition was found to be that which produces SiC and mullite in the ratio of about 1:1.