为了拓展C/C复合材料作为高温结构材料的应用领域,作者研究制备了一种具有自愈合功能的 C/C复合材料抗氧化涂层,它主要由SiC和Si-B-Al-Cr-Zr系陶瓷氧化物构成.静态干燥空气中的氧化试验显示,对应700～1 000 ℃的平均氧化失重率约为2.91×10-7～9.43×10-6 g/(cm2·s);涂层在1 000 ℃以内温度环境下具有良好的抗氧化能力;5～6个300～1 000 ℃热循环内涂层试样氧化速率下降,其后增加,6 h内经过10次300～1 000 ℃热循环后涂层试样氧化失重为19.64%,涂层在一定热循环范围内具有抗热震性能.SiC结合B基陶瓷为主要组分的涂层能够在较长氧化时间和一定的热震循环周期内保持涂层试样较低的氧化失重率并降低其氧化速率.
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