CAJ | 학술논문

　　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1773 K静态空气中的有效抗氧化时间为260 h，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。
　　위료제고 C/C 복합재료재고온공기중적항양화성능，채용포매법화도쇄법재 C/C 복합재료표면제비MoSi2?SiC/ZrO2?MoSi2도층。차조소묘전경화 X 사선연사등측시수단대도층적미관형모화상조성진행분석，동시연구도층적제비과정화고온정태공기중적항양화성능。결과표명：SiC?MoSi2/ZrO2?MoSi2도층치밀차무천투성렬문，후도위250~300μm，구유우이적항양화성능，재1773 K정태공기중적유효항양화시간위260 h，저주요시유우도층중생성료ZrSiO4，유효제고료도층적고온은정성。
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.