碳化硅-硅化钼复合涂层的修补和性能研究

The Mending and Properties of the SiC-MoSi_(2) Composite Coatings

采用涂刷法与氩弧焊熔覆技术相结合方法,在碳/碳复合材料表面制备碳化硅-硅化钼复合修补涂层,研究复合修补涂层的抗氧化和耐烧蚀性能。扫描电镜(SEM)和金相显微镜结果表明,制备的修补涂层与基体结合紧密,修补涂层厚度约为60μm;试样在1600℃高温下氧化4h后涂层质量增加约为0.36%;修补涂层的平均质量烧蚀率约为10.14mg/s。复合修补涂层表现出良好的抗氧化和耐烧蚀性能。

The SiC-MoSi_(2) composite mending coatings were prepared on the C/C composites surface by brushing method and TIG welding process.The scanning electron microscopy(SEM)and metallographic microscope results show that the thickness of the mending coatings is about 60μm,and the mending coating is closely bound to the substrate.The oxidation weight gain of the mending coatings is only 0.36%at 1600℃and the average mass ablation rate of the mending coatings is about 10.14 mg/s,respectively,which shows the mending coatings have good oxidation resistance ability and ablation resistance ability.