摘要
抗氧化涂层技术是解决碳/碳复合材料高温抗氧化性的最有效技术途径之一。为了提高材料在1 800℃以上的高温抗氧化性能,首次采用包埋法、涂刷法和等离子喷涂法在碳/碳复合材料表面制备出SiC/MoSi_2/ZrO_2梯度抗氧化涂层体系。采用SEM/EDS、结合力和粗糙度测试对涂层表面及断面形貌进行微观分析,利用等离子风洞对整个涂层体系进行氧化试验。结果表明:基体、过渡层和高温抗氧化层之间结合力良好,高温抗氧化层厚度均匀、结构致密。经等离子风洞氧化600s后,涂层表面温度达到1 850℃,氧化质量失重速率仅为3.15×10^(-6) g/(cm^2·s)。表明SiC/MOSi_2/ZrO_2梯度抗氧化涂层体系在1 800℃以上的高温环境下具有很好的抗氧化性能。
Anti oxidation coating technology is one of the most effective ways to solve the high temperature oxidation resistance of carbon/carbon composites.In order to improve the high temperature oxidation resistance of materials above 1 800 ℃,a SiC/MoSi2/ZrO2 gradient oxidation resistant coating system was fabricated on surface of the carbon/carbon composites by the pack cementation method,slurry method and plasma spraying process.The surface and section morphologies of coating were observed by XRD/EDS,intensity and roughness testing.The total coating system is tested by plasma wind tunnel.Results show that the coating has a compact interfacial bonding strength among matrix,transition layer and high temperature oxidation resistance layer.High temperature oxidation resistance layer has uniform thickness and dense structure.After 600 splasma wind tunnel oxidation,surface temperature of coating reaches up to 1 850 ℃.The oxidation mass loss rate is 3.15×10^-6 g/（cm^2·s）.The SiC/MoSi2/ZrO2 gradient oxidation resistant coating system has good antioxidant capacity over 1 800 ℃.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2016年第10期2290-2296,共7页
Acta Materiae Compositae Sinica
关键词
碳/碳复合材料
等离子喷涂
抗氧化涂层
高温抗氧化
烧蚀性能
carbon/carbon composites
plasma spraying
oxidation resistant coating
high temperature oxidation resistance
ablation property
