The invention discloses a Ti-modified CVD-SiC anti-oxidation coating and a preparation method and application thereof, and belongs to the technical field of material preparation.The method comprises the steps that firstly, a SiC coating is prepared on the surface of a C/C composite material through a chemical vapor deposition method, then low-temperature heat treatment is conducted at the temperature of 1100-1400 DEG C through a molten salt reaction, the Ti element is introduced into the SiC coating, a Ti-Si-C layer is formed in situ, and the Ti-Si-C anti-oxidation coating is obtained. And the Ti modified CVD-SiC anti-oxidation coating is prepared. According to the invention, the viscosity of SiO2 is reduced and the fluidity of SiO2 is improved by utilizing the mutual diffusion of TiO2 and SiO2 generated in the oxidation process, so that the self-healing efficiency of the SiC coating is improved; meanwhile, the excessive TiO2 plays a role in improving the stability of a surface oxidation film, and the thermal protection performance of a low-temperature area in the SiC coating is improved through cooperation of the TiO2 and the surface oxidation film.
本发明公开了一种Ti改性CVD‑SiC抗氧化涂层及其制备方法和应用,属于材料制备技术领域,该方法首先采用化学气相沉积法在C/C复合材料表面制备SiC涂层,随后利用熔盐反应在1100℃~1400℃下低温热处理,将Ti元素引入SiC涂层中,原位形成Ti‑Si‑C层,制得Ti改性CVD‑SiC抗氧化涂层。本发明利用氧化过程中生成的TiO2和SiO2的互扩散降低SiO2粘度,提高SiO2流动性,进而提高SiC涂层的自愈合效率;同时过量的TiO2对表面氧化膜起到提高稳定性作用,两者协同实现SiC涂层中低温区热防护性能的提升。
Ti modified CVD-SiC anti-oxidation coating as well as preparation method and application thereof
一种Ti改性CVD-SiC抗氧化涂层及其制备方法和应用
2024-05-10
Patent
Electronic Resource
Chinese
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