C/C-B-SiC复合材料的烧蚀性能研究  

Research on ablation properties of C/C-B-SiC composites

作　　者：田玲[1] 范雪骐[2] 陈来[2] 吴市[2] 张家宝[2] 任慕苏[2] 孙晋良[2] 

机构地区：[1]上海大学环境与化学工程学院,上海200072 [2]上海大学材料科学与工程学院,上海200072

出　　处：《固体火箭技术》2007年第3期256-259,共4页Journal of Solid Rocket Technology

摘　　要：采用聚合物浸渗裂解法制备了C/C-B-S iC复合材料,用H2-O2焰法对其烧蚀性能进行了研究,并推测了C/C-B-S iC复合材料的烧蚀机理。结果表明,C/C-B-S iC复合材料的烧蚀率随材料密度ρ的增加呈下降趋势,ρ=1.50 g/cm3的C/C-B-S iC复合材料的线烧蚀率相当于ρ=1.86 g/cm3的C/C复合材料的61%,烧蚀时间为60 s时的质量烧蚀率相当于ρ=1.77 g/cm3的C/C复合材料。C/C-B-S iC复合材料在H2-O2焰条件下的烧蚀机制是热化学烧蚀(氧化和升华)和机械冲刷的综合作用。C/C-B-SiC composites were prepared by polymer infiltration pyrolysis process, and its ablation properties were investigated by using H2-O2 flame method. Moreover the ablation mechanism of C/C-B-SiC composites was predicted. The results show that the ablation rate of C/C-B-SiC composites presents decreasing tendency with the increase of density; linear ablation rate of C/C-B-SiC composites （ρ = 1. 50 g/cm^3 ） is only 61 percent that of C/C composites （ρ = 1.86 g/cm^3 ）. Mass ablation rate of C/ C-B-SiC composites （ρ = 1.50 g/cm^3 ） is equivalent to that of C/C composites （ρ = 1.77 g/cm^3 ） when ablation time is 60 s. The ablation mechanism of the C/C-B-SiC composites under H2-O2 flame condition is synthetic effect of thermo-chenfistry ablation （ oxidation and sublimation） and mechanical erosion.

关 键 词：C/C—B—SiC复合材料 烧蚀 抗氧化 

分 类 号：TB332[一般工业技术—材料科学与工程]