自加热化学液相沉积法制备炭/炭-SiC复合材料及其抗氧化性能

Fabrication of C/C-SiC by Self-heat Chemical Liquid Deposition Method and Oxidation Resistance Property

摘要: 以液态炭源为前驱体、炭毡为增强体,采用自加热化学液相法,以二次沉积法制备了炭/炭-SiC复合材料;考察了温度和氧化时间对该材料质量损失的影响.结果表明：炭/炭-SiC复合材料的抗氧化性能较炭/炭复合材料大幅度提高,质量损失率仅为炭/炭复合材料的15%~20%.

Abstract: Adopting self-heat chemical liquid deposition(SHCLD) method,C/C-SiC composites were fabricated by twice-step deposition method with liquid hydrocarbon as precursor,carbon felt as porous performs.Effects of oxidation temperature and time to oxidation weight loss rates of different composites were investigated.The results show C/C-SiC composites has much more better oxidation resistance compared to C/C composites,and the weight loss of C/C-SiC composites is 15%-20% of C/C composites.By microstructure analysis of the two composites,oxidation mechanism is discussed.