摘要
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 the precursor infiltration and pyrolysis process, and the ablation properties of the C/C-SiC composites were investigated by the H2-O2 torch flame. The results indicate that the ablation rate of C/C-SiC composites decrease with the increase of Si contents. After infiltration is carried for 5 times, the density of C/C-SiC composites increases from 1.46 g/cm3 to 1.75 g/cm3 and the Si content increases from 5.06% to 13.8%. Meanwhile, the linear ablation rate and mass ablation rate of C/C-SiC specimens decrease by 574% and 134.5%, respectively. The linear ablation rate and mass ablation rate of the C/C-SiC composite with a density of 1.75 g/cm3 are 2.22/.trrds and 1.289mg/s, only 21.7% and 78.6% of those of the C/C composite with a density of 1.78 g/cm3, respectively. The introduction of SiC in the matrix greatly enhances the anti-oxidative ablation property of the C/C composite.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2008年第7期973-977,984,共6页
Journal of The Chinese Ceramic Society
关键词
碳/碳-碳化硅复合材料
烧蚀
先驱体浸渗裂解法
抗氧化
carbon/carbon-silicon carbide composite
ablation
precursor infiltration and pyrolysis process
anti-oxidation
