摘要
通过包埋法和高温等离子喷涂在C/C复合材料表面制备了ZrC-TiC/SiC复合涂层,利用XRD、SEM、EDS及纳米压痕等测试方法,研究ZrC-TiC/SiC复合涂层的力学及高温耐烧蚀性能。结果表明:复合涂层由SiC内层和ZrC-TiC外层组成,整体结构较为致密。纳米压痕测试结果表明,复合涂层的硬度平均值为7.089 GPa,弹性模量平均值为109.938 GPa。经氧乙炔火焰烧蚀30 s后,其线烧蚀率和质量烧蚀率分别为0.0127 mm/s和0.0382 g/s,涂层表面形成了锆氧化物(ZrO_(2)-TiO_(2)、ZrSiO_(4))熔融保护膜,有效地阻碍了SiC内涂层的进一步氧化烧蚀,从而提高了C/C复合材料的高温耐烧蚀性能。
ZrC-TiC/SiC coating was prepared on the C/C composites by the embedding reaction process and high-temperature plasma spraying method,and the mechanical performance and high-temperature ablation resistance of ZrC-TiC/SiC coating were investigated by XRD,SEM,EDS and nanoindentation.The results show that the prepared coating mainly consists of SiC inner layer and ZrC-TiC outer layer,forming a relatively dense overall structure.The nanoindentation test show that the average hardness of the coating is 7.089 GPa,and the average elastic modulus is 109.938 GPa.After oxyacetylene flame ablation of 30 s,the linear ablation rate and mass abla-tion rate are 0.0127 mm/s and 0.0382 g/s,respectively.Following the ablation process,the molten Zr-based oxides(ZrO,-TiO_(2),Zr-SiO_(4))formed a protective layer that effectively impends further oxidation and ablation of the SiC inner coating.This phenomenon signif-icantly enhances the ablation resistance of C/C composites at high-temperature.
作者
左远名
杨鑫
刘忠国
罗骁
张夏翔
黄启忠
Zuo Yuan-ming;Yang Xin;Liu Zhong-guo;Luo Xiao;Zhang Xia-xiang;Huang Qi-zhong(State Key Laboratory of Powder Metallurgy,Central South University,Hunan Changsha 410083,China)
出处
《炭素技术》
北大核心
2025年第3期45-49,76,共6页
Carbon Techniques
作者简介
左远名(2000-),男,硕士研究生,主要研究方向为C/C复合材料抗氧化陶瓷涂层,E-mail:907937247@qq.com;通讯作者:杨鑫,研究员,博导,主要研究方向为C/C复合材料、新型炭材料、耐高温炭/陶瓷基复合材料的制备与应用,E-mail:yangxincsu@csu.edu.cn。
