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中文摘要：
为了提高C/C复合材料在高温空气中的抗氧化性能,采用包埋法和涂刷法在C/C复合材料表面制备MoSi2-SiC/ZrO2-MoSi2涂层。借助扫描电镜和X射线衍射等测试手段对涂层的微观形貌和相组成进行分析,同时研究涂层的制备过程和高温静态空气中的抗氧化性能。结果表明：SiC-MoSi2/ZrO2-MoSi2涂层致密且无穿透性裂纹,厚度为250~300μm,具有优异的抗氧化性能,在1773K静态空气中的有效抗氧化时间为260h,这主要是由于涂层中生成了ZrSiO4,有效提高了涂层的高温稳定性。
英文摘要：
To improve the oxidation resistance of carbon/carbon （C/C） composites in air at high temperatures, a SiC- MoSi2/ZrO2-MoSi2 coating was prepared on the surface of C/C composites by pack cementation and slurry method. The microstructures and phase compositions of the coated C/C composites were analyzed by scanning electron microscopy and X-ray diffraction, respectively. The result shows that the SiC-MoSi2/ZrO2-MoSi2 coating is dense and crack-free with a thickness of 250-300 μm. The preparation and the high temperature oxidation property of the coated composites were investigated. The as-received coating has excellent oxidation protection ability and can protect C/C composites from oxidation for 260 h at 1773 K in air. The excellent anti-oxidation performance of the coating is considered to come from the formation of ZrSiO4, which improves the stability of the coating at high temperatures.
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