Oxidation resistance of ZrB ₂-SiC multilayer ceramics

ZrB ₂-SiC multilayer ceramic was prepared by a coneventional ceramic tape casting technology. The density was measured using the Archimede method. The microstructure of samples was observed by scanning electron microscopy. The oxidation resistance of ZrB ₂-SiC multilayer ceramics was also determined. The results indicate that for the product sintered at 1 950°C, the relative density is 99.7%. During the oxidation process of this material, the low melting phase is firstly volatilized, and then the oxidation layer is formed, which can diminish the further oxidation. The oxidation resistance of ZrB ₂-SiC multilayer ceramic was better than that of ZrB ₂-SiC monolithic ceramics.