Effect of Temperature on Stress Oxidation Behaviors of 2D C/SiC-BC _x Composite in Wet Oxygen Atmosphere

The effect of temperature on stress oxidation behaviors of 2D C/SiC-BC_x composites was investigated. The results indicate that the damage rate of 2D C/SiC-BC_x composites increases with increasing oxidation temperature. The residual tensile strengths of 2D C/SiC-BC_x composites show nonlinear change with increasing oxidation time. At 973.15 K (700 °C) and 1173.15 K (900 °C), the residual strengths of 2D C/SiC-BC_x composites increase firstly and then decrease with increasing oxidation time. At 1473.15 K (1200 °C), the residual strengths are zero after stress oxidation for 9 hours. The oxidation of BC_x layer aggravates, and the glass phase becomes more obvious with increasing oxidation temperature. At the same time, the oxidation damage of 2D C/SiC-BC_x composites becomes more serious.