期刊
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
卷 41, 期 7, 页码 4067-4075出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2021.02.004
关键词
Ablation; Bonding strength; HfC; Chemical vapor deposition
资金
- National Natural Science Foundation of China [52061135102]
- Innovation Talent Promotion Plan of Shaanxi Province for Science and Technology Innovation Team [2020TD-003]
In this study, the bonding strength and ablation resistance of HfC based coating on hemisphere shaped C/C composites were optimized by introducing a HfC-SiC diffusion interface. The results showed a significant increase in bonding strength and a reduction in linear and mass ablation rates after introducing HfC-SiC diffusion. The enhancement of ablation resistance was attributed to the adhesion effect of Hf-Si-O glass phase and the increase of bonding strength in the outer layer.
To optimize the bonding strength and ablation resistance of HfC based coating on hemisphere shaped C/C composites, a HfC-SiC diffusion interface was introduced by in-situ reaction and chemical vapor deposition. The microstructure, bonding strength and ablation resistance were characterized. After introducing HfC-SiC diffusion, the bonding strength significantly increased by 179 %. For hemisphere shaped samples, the linear and mass ablation rates decreased by 65.0 % and 53.0 %, respectively. The improvement of ablation resistance was attributed to the adhension effect of Hf-Si-O glass phase generated in outer layer and the increase of bonding strength.
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