【摘要】 C/C复合材料使用后由于氧化表面硬度有不同程度的下降。经再次防氧化处理后,测试了表面硬度及抗氧化性能。结果表明:氧化后C/C复合材料试样的表面肖氏硬度为HS70时,再次防氧化处理后,其表面硬度增至HS80,在700℃恒温静态氧化条件下,氧化失重率分别为0.44%/15h,1.2%/22h,其抗氧化性能最强。表面硬度为HS40的C/C复合材料试样,距表层1mm深度范围内其硬度均低于基底,再次防氧化处理后其硬度值从HS40增至HS60,其700℃抗氧化性能最差,氧化失重率分别为3.93%/15h,6.52%/22h。更多还原

【Abstract】 The used carbon-carbon(C/C)composite softened on surface to different levels due to oxidation.The surface Shore hardness(HS)and oxidation resistance of the used C/C composite samples after anti-oxidation treatment were measured.The results show that the samples with the hardness of HS70 increased to HS80 after recoating,and the mass loss ratios were 0.44%/15 hand 1.2%/22 hafter oxidized at 700℃ in air.The surface layer within 1mm was softener than the substrate for the oxidized C/C composite sample with the hardness of HS40,and the hardness increased from HS40 to HS60 with a mass loss ratios of 3.93%/15h and 6.52%/22h at 700℃in air after recoating.更多还原