A SiC-similar to50 vol% mullite-particulate composite fabricated by melt infiltration was found to exhibit excellent oxidation resistance at temperatures >1500degreesC in air. Cristobalite was found on the surface of samples after 100 h oxidation at temperatures of 1515degrees, 1620degrees, and 1650degreesC. The oxidation rate constant at 1515degreesC was almost comparable to hot-pressed bulk SiC, and at least 1 order of magnitude lower than the lowest value for the oxide-matrix SiC-particulate composites made by conventional processes, as reported in the literature and made by melt infiltration in the present study.