Oxidation behavior and ablation mechanism of Cf/ZrB2-SiC composite fabricated by vibration-assisted slurry impregnation combined with low-temperature hot pressing

The C-f/ZrB2-SiC composite was fabricated by vibration-assisted slurry impregnation and low-temperature hot pressing. The C-f/ZrB2-SiC composite exhibited an excellent thermal shock resistance and oxidation resistance with a dense SiO2-rich glassy layer exposing at 1500 degrees C/1 h condition for static oxidation. Moreover, the high temperature ablation resistance was investigated with an oxyacetylene ablative testing at temperature 1800 degrees C for 1000s. The mass loss rate and line loss rate were 7.32x10(-4) mg/mm(2).s and -1.70x10(-4) mm/s, respectively. The enriched silica glass layer embedded with a small amount of zirconia particles was contributed mainly to the excellent ablation resistance of C-f/ZrB2-SiC composite.