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- 2019
ZrB2-SiC/(C/C)复合涂层材料微观结构与静态氧化特性
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Abstract:
采用涂刷法在C/C复合材料表面制备了ZrB2-SiC复合涂层，采用XRD和SEM分析了涂层的相组成和微观结构，并研究了ZrB2-SiC/（C/C）复合涂层材料在1 200℃和1 500℃的静态氧化性能。结果表明：ZrB2-SiC涂层结构致密，无明显的孔洞和裂纹；涂层有效改善了材料的抗氧化性能，经1 200℃静态氧化60 min后，ZrB2-SiC/（C/C）复合涂层材料失重率仅为2.4%，1 500℃时失重率增大至15%，小于无涂层保护的C/C复合材料（~35%）。ZrB2-SiC/（C/C）复合涂层材料氧化后，形成了含有ZrO2等高熔点颗粒的玻璃态SiO2氧化膜，能够有效抑制氧的扩散，从而提高了C/C复合材料抗氧化性能。 The ZrB2-SiC composite coatings were prepared on C/C composites by slurry painting. The phase composition and microstructure of the as-prepared ZrB2-SiC/(C/C) composites were analyzed by XRD spectroscopy and SEM, and the static oxidation behavior at 1 200℃ and 1 500℃ were also investigated. The results show that the ZrB2-SiC coatings are compact and uniform without obvious pores and cracks. After static oxidizing at 1 200℃ for 60 min, the mass loss rate of the as-prepared ZrB2-SiC/(C/C) composites is only about 2.4%. At 1 500℃, the mass loss rate increases to about 15%, but it is still lower than that of C/C composites without anti-oxidation coatings(~35%). In the static oxidation process, the significantly improved oxidation resistance of the as-prepared ZrB2-SiC/(C/C) composites is attributed to the generated glassy SiO2 film containing high melting point particles such as ZrO2. 装备预研联合基金（6141B06300103
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