Mechanical, oxidation and ablation properties of C/(C-SiC)CVI-(ZrC-SiC)PIP composites

A joint chemical vapor infiltration-precursor infiltration and pyrolysis (CVI-PIP) process was used to fabricate C/C-SiC-ZrC composites with different volume ratio of CVI-derived C-SiC. The composite with a C-SiC volume ratio of 0.91 has a higher tensile and flexural strength of 181.7 MPa and 352.8 MPa, respectively, and also exhibits a better anti-oxidation property at 800 similar to 1400 degrees C for 30 h. After an oxyacetylene ablation for 600 s at similar to 2100 degrees C, the composite with a C-SiC volume ratio of 0.12 possesses a better anti-ablation performance with a linear and mass ablation rates of 0.94 um x s(-1) and 0.13 mg x cm(-2)x s(-1), respectively.