中文摘要：

以不同质量比Si C/Zr C有机前驱体混合溶液为浸渍剂,采用前驱体浸渍裂解法（PIP）制得C/CSi C-Zr C复合材料。对C/C-Si C-Zr C复合材料的组成、微观结构及烧蚀性能进行了分析和测试,探讨了Si C/Zr C前驱体配比对复合材料烧蚀性能的影响。结果表明,随着Zr C含量的增加,复合材料的质量烧蚀率和线烧蚀率呈现出先减小后增大的趋势。采用质量比为1∶3的Si C/Zr C前驱体混合溶液制备的C/C-Si C-Zr C复合材料具有相对较好的烧蚀性能,试样在氧乙炔焰下3 000℃烧蚀20 s,其质量烧蚀率和线烧蚀率分别为-0.65 mg/s和21μm/s。Si C-Zr C复相陶瓷中Zr C含量过低或过高均不利于提高其氧化稳定性,而Zr C含量适中的Si C-Zr C复相陶瓷具有较好的氧化稳定性。

英文摘要：

The C / C- Si C- Zr C composites were prepared by precursor impregnation and pyrolysis method（ PIP） using different mass ratio of PCS /PZC as impregnant. The microstructure and the ceramic phase distribution of the C / C- Si C- Zr C composites before and after ablation were examined. And the effect of Si C / Zr C precursor ratio on the ablation property of the C / C- Si C- Zr C composites was analyzed. The results show that the mass ablation rate and linear ablation rate of the C / C- Si C- Zr C composites were decreased firstly and increased subsequently with the increasing of the content of Zr C. The composite possessing the relatively best ablation performance was fabricated with the impregnant with the mass ratio of PCS / PZC = 1∶ 3. After ablation on oxyacetylene flame with the surface temperature of 3 000℃,the mass ablation rate and linear ablation rate of the sample are- 0. 65 mg / s and 21 μm / s,respectively. Too much or less Zr C in Si C- Zr C multiphase ceramics is not favorable to the oxidation stability of the samples. Therefore,appropriate Zr C may be better.