Abstract: In order to achieve rapid preparation of ultra-high temperature ceramic coating on the surface of C/C composites, the ZrSi2-ZrC-HfC ceramic coating was prepared on C/C composite by slurry brushing method and high-temperature pre-oxidation treatment. The effects of pre-oxidation treatment on microstructure and ablation properties of coating were studied. The results show that the liquid SiO2 phase generated by high-temperature pre-oxidation can fill the internal pores of the coating when compared with the non-preoxidized coating, improving the compactness of coating by bonding ceramic particles and further increasing the anti-ablation property. The coating was tested for 30 s, 60 s and 90 s by oxyacetylene ablation with a heat flux of 3 200 kW/m2. All of the oxide layer remained intact. The SiO2 generated by the pre-oxidation treatment bonds the coating together, preventing the falling off of the coating at the initial stage of ablation. Meanwhile, the SiO2 generated in the ablation process vo-latilizes through heat absorption, reducing the surface temperature and providing thermal protection. The line and mass ablation rates of the coa-ting after ablation for 90 s are 0.837 μm/s and 0.364 mg/s, respectively. The method has the advantages of simple operation and high preparation efficiency. It is suitable for the preparation of different types of ultra-high temperature ceramic coatings on the surface of C/C composites with different structure.
陈意高, 姚熹, 王凯杰, 王坤杰, 张光喜. C/C复合材料表面超高温陶瓷涂层的快速成型及其烧蚀性能[J]. 材料导报, 2025, 39(12): 24050007-5.
CHEN Yigao, YAO Xi, WANG Kaijie, WANG Kunjie, ZHANG Guangxi. Rapid Preparation of Ultra-high Temperature Ceramics Coating on C/C Composites and Its Ablation Property. Materials Reports, 2025, 39(12): 24050007-5.
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2025, Vol. 39 
