XU Chonghai, AI Xing

（Shandong Institute of Light Industry）（Shandong University）

Abstract: The oxidation performances at elevated temperatures of SiC and Ti（C‚N） dispersed Al₂O₃ based composite ceramic material have been studied in detail．Results show that the weight gains of the static oxidation under air atmosphere of the material obey the parabolic law well‚and the main oxidation products are mainly 3Al₂O₃、2SiO₂ and TiO₂．The energy of activation of the material decreases with different extent with the increase of the content of SiC and Ti（C‚N）．Relatively high oxidation resistance is found for the SiC and Ti（C‚N） dispersed ceramic composite． 

Key words: alumina‚ceramic composite‚oxidation