【摘要】 通过化学气相渗透法（CVI）制备多孔C/C骨架，随后采用浆料浸渍和先驱体浸渍裂解法分别引入ZrC和SiC陶瓷基体，制备得到密度为2.68 g/cm³的C/C-ZrC-SiC复合材料。对C/C-ZrC-SiC复合材料进行了压缩性能和烧蚀性能测试，结果表明：C/C-ZrC-SiC复合材料的平均压缩强度为243.84 MPa，经热流密度为2.4 MW/m²的氧乙炔火焰烧蚀30 s后，试样的质量和线烧蚀率分别为0.009 9 g/s和0.014 2 mm/s，烧蚀过程中，表面最高温度高达2 225℃。烧蚀后试样表面形成一层主要由ZrO₂构成的连续氧化膜，该保护膜有效阻隔了外部热流与氧气的侵入，从而保护内部纤维与基体免受进一步侵蚀。更多还原

【Abstract】 C/C preforms were firstly deposited with PyC by chemical vapor infiltration（CVI） method to prepared porous C/C skeleton. Subsequently, ZrC and SiC ceramics were introduced through slurry infiltration and precursor infiltration and pyrolysis（PIP） methods to fabricate C/C-ZrC-SiC composites with a density of 2.68 g/cm³. The compressive strength and ablative properties of the C/C-ZrC-SiC composites were tested. The results indicate that the average compressive strength of the composites reached 243.84 MPa. After ablation for 30s under an oxyacetylene flame with a heat flux of 2.4 MW/m², the mass and linear ablation rate of the composites were 0.009 9 g/s and 0.014 2 mm/s, respectively, with the surface temperature reaching a maximum of 2 225 ℃. After ablation, a dense oxide layer primarily composed of ZrO₂, was formed on the sample surface. This oxide layer can effectively impede the ingress of external heat flux and oxygen, thereby protecting the internal fibers and matrix from further erosion.更多还原