摘要
To improve the anti-ablative performance under high pressure heat fluxes environment, an enhancement method was presented for ZrB2/SiC composite coatings on the C/C matrix. It was arranged like that, taking the chemical vapor deposition as the preparation method of sealing layer (CVD)–SiC on the plasma spraying ZrB2/SiC composite coatings and taking the CH3SiCl3–H2–Ar as a deposition system. Based on this condition, the structure evolution of the ZrB2/SiC composite coatings with CVD–SiC sealing layer and ablation property and ablation mechanism were investigated under an oxyacetylene torch environment. The results show that after two 600 s cycles ablation, the ZrB2/SiC composite coating enhanced by the CVD–SiC sealing layer still possesses the ablative resistance and the surface of CVD–SiC shows a transformation from β to α phase. CVD–SiC layer is filled with the gap of plasma spraying ZrB2/SiC composite coatings, the sealing layer can restrict the oxygen diffusion to the C/C matrix along cracks and holes in the coatings, thereby improving the ablative resistance.
投稿的翻译标题 | Anti-Ablative Performance Enhancement Method for ZrB2/SiC Composite Coatings on C/C Matrix |
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源语言 | 繁体中文 |
页(从-至) | 76-82 |
页数 | 7 |
期刊 | Beijing Ligong Daxue Xuebao/Transaction of Beijing Institute of Technology |
卷 | 44 |
期 | 1 |
DOI | |
出版状态 | 已出版 - 1月 2024 |
关键词
- C/C composite coatings
- ablation
- chemical vapor deposition
- plasma spraying
- sealing layer