2D C/SiC-ZrB_2复合材料的烧蚀性能  

Ablation Properties of 2D C/SiC-ZrB_2 Composite

作　　者：童长青[1,2] 成来飞[2] 刘永胜[2] 张立同[2] 

机构地区：[1]龙岩学院化学与材料学院,福建龙岩364000 [2]西北工业大学超高温结构复合材料国防科技重点实验室,西安710072

出　　处：《航空材料学报》2012年第2期69-74,共6页Journal of Aeronautical Materials

基　　金：国家自然科学基金(90405015);国家杰出青年科学基金(50425208)

摘　　要：用ZrB2微粉对2D C/SiC基体进行改性,研究了化学气相渗透结合浆料浸渍及先驱体浸渍裂解工艺制备2DC/SiC-ZrB2复合材料在氧-乙炔焰和1800℃甲烷风洞环境中的烧蚀行为。结果表明:在氧-乙炔环境中,2D C/SiC-ZrB2的线烧蚀率和质量烧蚀率分别为6.1×10-2mm/s和1.0×10-2g/s,相对2D C/SiC复合材料而言,ZrB2微粉并没有提高C/SiC复合材料的抗烧蚀性能。在1800℃甲烷风洞环境中,涂层致密度起主要作用,涂层致密度相同时,复合材料的开气孔率越大,质量烧蚀率越大,ZrB2微粉的渗入对C/SiC复合材料的烧蚀性能影响不大。2D C/SiC-ZrB2 composite was fabricated by combining chemical vapor infiltration,ZrB2 slurry infiltration and polymer infiltration and pyrolysis method.The ablation properties of the composite under oxyacetylene flame and 1800℃ methane combustion wind tunnel were studied.The results show that under the oxyacetylene flame environment,the linear ablation rate and the mass ablation rate of the 2D C/SiC-ZrB2 are 6.1×10-2mm/s and 1.0×10-2g/s respectively.The anti-ablation performance is improved by infiltrated ZrB2 particles into C/SiC matrix.Under the 1800℃methane combustion wind tunnel,the coating density plays a major role on the ablation behavior.At the same coating density,the mass ablation rate increases with the open porosity of the composites.The addition of ZrB2 to C/SiC has little effect on the anti-ablation performance.

关 键 词：C/SiC-ZrB2复合材料 氧-乙炔焰 甲烷风洞 烧蚀性能 

分 类 号：TB332[一般工业技术—材料科学与工程] V257[航空宇航科学与技术—航空宇航制造工程]