论文部分内容阅读
用先驱体浸渗裂解法制备了碳纤维增强碳(carbon fiber reinforced carbon,C/C)-SiC复合材料,用H2-O2火焰法检测其烧蚀性能。结果表明:C/C-SiC复合材料的烧蚀率随复合材料中的Si含量的增加而呈下降趋势;经过5次浸渍,C/C-SiC复合材料的密度从1.46 g/cm3增加到1.75 g/cm3,Si含量从5.06%增加到13.8%,线烧蚀率和质量烧蚀率分别下降474%和34.5%。密度为1.75 g/cm3的C/C–SiC复合材料,其线烧蚀率和质量烧蚀率分别为2.22μm/s和1.289 mg/s,其线烧蚀率和质量烧蚀率分别为密度1.78 g/cm3的C/C复合材料的21.7%和78.6%。基体中SiC的引入明显提高了C/C复合材料的抗氧化烧蚀性能。
Carbon fiber reinforced carbon (C / C) -SiC composites were prepared by precursor infiltration and pyrolysis method, and their ablation properties were tested by H2-O2 flame method. The results show that the ablation rate of C / C-SiC composites decreases with the increase of Si content in the composites. The density of C / C-SiC composites increases from 1.46 g / cm3 to 1.75 g / cm3. The Si content increased from 5.06% to 13.8%, and the line ablation rate and mass ablation rate decreased 474% and 34.5% respectively. The linear ablation rate and mass ablation rate of C / C-SiC composites with density of 1.75 g / cm3 were 2.22 μm / s and 1.289 mg / s, respectively. The linear ablation rate and mass ablation rate were C 21.7% and 78.6% of 1.78 g / cm3 C / C composites. The introduction of SiC in the matrix significantly improves the anti-oxidation ablation performance of C / C composites.