Oxidation resistance and mechanical properties of Al₄SiC₄ ceramic at high temperature

The oxidation resistance and mechanical properties of Al₄SiC₄ ceramics at high temperature were investigated. The results showed that Al₄SiC₄ ceramic had the excellent oxidation resistance, and the kinetics of oxidation obeyed the parabolic law from 1000°C to 1600°C. The oxide scales consisted of the outer oxide layer with the higher density, the inner oxide layer (intermediate layer) with a few of large size pores, and the reaction layer with a number of small size pores. The high-temperature bending strength of Al₄SiC₄ ceramics showed an increasing trend from 1000°C to 1300°C .The bending strength at 1300°C (449.73 MPa) was about 1.5 times of that at room temperature (297.1 MPa).