Effect of ozone adsorption on the oxidation behaviour of ZrB2-SiC ceramic composites

Ceramics of ZrB2-20 vol.% SiC were prepared by hot pressing method, and ozone (O3) was adsorbed on the surface of the ceramics. Then the as-adsorbed ceramics were oxidized in air and the effect of ozone adsorption on the oxidation behaviour of the ceramic composites was analyzed. The experimental results indicate that adsorption of ozone promotes the oxidation of the ceramic composites, especially for the SiC. In addition, more silica glass formed promotes the formation and crystal growth of zircon.