CAJ | 학술논문

　　采用包埋法和料浆涂刷法在C/C复合材料表面制备C/SiC/MoSi2?SiC?Si抗氧化复合涂层。通过扫描电镜(SEM)、电子能谱(EDS)以及X射线衍射(XRD)等测试手段对涂层的微观结构、元素分布及晶相组成进行分析，研究涂层试件在1873 K静态空气下的抗氧化性能。结果表明：制备的复合涂层主要由MoSi2、SiC和Si构成；其在1873 K静态空气下有效保护C/C复合材料达200 h，带涂层的C/C复合材料试样氧化失重率仅为3.25%。涂层试样的氧化失重主要是由于涂层表面SiO2的挥发及裂纹、孔洞等缺陷的形成引起的。
　　채용포매법화료장도쇄법재C/C복합재료표면제비C/SiC/MoSi2?SiC?Si항양화복합도층。통과소묘전경(SEM)、전자능보(EDS)이급X사선연사(XRD)등측시수단대도층적미관결구、원소분포급정상조성진행분석，연구도층시건재1873 K정태공기하적항양화성능。결과표명：제비적복합도층주요유MoSi2、SiC화Si구성；기재1873 K정태공기하유효보호C/C복합재료체200 h，대도층적C/C복합재료시양양화실중솔부위3.25%。도층시양적양화실중주요시유우도층표면SiO2적휘발급렬문、공동등결함적형성인기적。
C/SiC/MoSi2?SiC?Si oxidation protective multilayer coating for carbon/carbon (C/C) composites was prepared by pack cementation and slurry method. The microstructure, element distribution and phase composition of the as-received coating were analyzed by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD). The results show that the multilayer coating was composed of MoSi2, SiC and Si. It could effectively protect C/C composites against oxidation for 200 h with the mass loss of 3.25%at 1873 K in static air. The mass loss of the coated C/C composites results from the volatilization of SiO2 and the formation of cracks and bubble holes in the coating.