Fabrication and ablation resistance research of C/ZrC-SiC composites

Abstract C/ZrC-SiC composites were prepared by precursor impregnation pyrolysis (PIP) process. The ablation resistance of the composites was studied. The residual mechanical property of the composites after ablation was compared and analyzed. The results show that the prepared C/ZrC-SiC composites have good ablation resistance under high temperature oxidation environment. The ablation amount in large area is less than 0.1 mm. The ablation products on the surface of the composites are mainly composed of SiO2 and ZrO2, forming a denser oxide film, which has a good protective effect on the structure of the composites. The data of residual mechanical properties indicate that the synergistic effect of high temperature and thermal stress under ablation environment may lead to the decrease of mechanical strength of composites.