Oxidation behavior of C/SiC-Ti3SiC2 at 800–1300 °C in air

In this work, the oxidation behavior of C/SiC-Ti3SiC2 from 800 to 1300 °C has been studied compared with that of C/SiC. C/SiC-Ti3SiC2 shows severe weight loss and low flexural strength after oxidation of 10 h at 800 °C. With the oxidation temperature increasing to 1000 °C, the coating cracks can be healed by silica and the matrix cracks can be healed by the oxidation product of Ti3SiC2, so the strength retention ratios of C/SiC-Ti3SiC2 reach to above 90% after oxidation of 10 h at 1000 and 1200 °C, revealing better oxidation resistance than C/SiC at the temperature range from 1000 to 1200 °C. With the oxidation temperature increasing to 1300 °C, the flexural strength decreases after oxidation of 10 h due to the oxidation of outer carbon fibers.