通过先驱体浸渍裂解法制备了不同ZrC?SiC含量的C/C?ZrC?SiC复合材料，并研究了不同陶瓷含量对材料显微结构和烧蚀性能的影响。C/C?SiC和C/C?ZrC?SiC复合材料在2300°C的烧蚀火焰下均呈现出优异的抗烧蚀性能。随着ZrC陶瓷含量的增加，在烧蚀过程中形成了连续的氧化膜涂层及固态的Zr?Si?O中间相，并且氧化物薄膜的结构与ZrC?SiC陶瓷的含量密切相关。固态的ZrO2?ZrC和Zr?Si?O中间相可以适当提高SiO2的黏度，从而提升氧化膜的抗剥蚀能力。连续的SiO2?ZrO2?ZrC?SiC层将作为热量和氧气的扩散障碍层，阻止其向材料内部扩散而引起材料的进一步烧蚀。ZrC和SiC含量分别为27.2%和7.56%时，C/C?ZrC?SiC复合材料表现出更好的抗烧蚀性能，其质量烧蚀率和线烧蚀率分别为?3.51 mg/s和?1.88μm/s。
C/C?ZrC?SiC composites with different ZrC?SiC contents were fabricated by precursor infiltration and pyrolysis. The effect of ceramic content on the microstructure and ablation resistance was investigated. Both the C/C?SiC and C/C?ZrC?SiC composites exhibited good ablation resistance under the plasma flame above 2300°C. Withtheincreaseof ZrC content, a continuous oxide layer and a solid Zr?Si?O mesophase were formed during the ablation. And the structure of the formed oxides layer closely linked with the contents of ZrC?SiC ceramics. The solid ZrO2?ZrC and Zr?Si?O mesophase could increase the viscosity of SiO2 moderately and improve the anti-scouring ability. The continuous SiO2?ZrO2?ZrC?SiC layer would serve as a thermal and oxygen barrier for preventing the substratefrom further ablation. The C/C?ZrC?SiC composites with 27.2%ZrC and 7.56%SiC shows superior ablation resistance, and the mass and linear ablation rates are?3.51 mg/s and?1.88 μm/s, respectively.
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