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设计并制备出了一种C/C复合材料抗氧化涂层 ,其基本结构为浸渍过渡层 /陶瓷相阻挡层 /玻璃相封填层。涂覆有复合涂层的C/C复合材料试样在空气中于 90 0℃下氧化 10h的失重率仅为 0 0 34g/cm2 ,氧化失重速率为 5 67× 10 - 5g/ (cm2 ·min) ;90 0℃ 室温空气中急冷急热 10h循环 10 0次后 ,失重率为 8 4 1% ,涂层没有剥落 ,说明整个涂层具有良好的高温抗氧化性和抗热震性能。这种复合涂层可在中低温 (不大于 110 0℃ )氧化性气氛中长时间工作 ,适合作C/C复合材料航空刹车副等部件的抗氧化涂层 ,能够大大提高C/C复合材料的使用寿命和性能。
A C / C composite anti-oxidation coating was designed and prepared. The basic structure of the C / C composite anti-oxidation coating was impregnated transitional layer / ceramic phase barrier layer / glass phase sealing layer. The weight loss rate of C / C composite coated with composite coating in air at 90 0 ℃ for 10h was only 0 0 34g / cm2, and the rate of weight loss at oxidation was 5 67 × 10-5g / (cm2 · min ); 90 0 ℃ room temperature 10h hot and cold after 10h cycle, the weight loss rate of 8 4 1%, the coating did not spall, indicating the entire coating has good high temperature oxidation resistance and thermal shock resistance. The composite coating can work for a long time under the oxidizing atmosphere of low and medium temperature (not more than 110 ° C) and is suitable for the anti-oxidation coating of components such as C / C composite aviation brake and the like, and can greatly improve the C / C composite material Service life and performance.