Ablation Behavior of ZrB2-Based Coating Prepared by Supersonic Plasma Spraying for SiC-Coated C/C Composites Under Oxyacetylene Torch
Ablation Behavior of ZrB2-Based Coating Prepared by Supersonic Plasma Spraying for SiC-Coated C/C Composites Under Oxyacetylene Torch
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DOI：
10.1007/s11666-013-9913-z
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发表时间：
2013-03
影响因子：
3.1
通讯作者：
X. Yao;Hejun Li;Yulei Zhang;Kezhi Li;Q. Fu;Han Peng
中科院分区：
文献类型：
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作者：
X. Yao;Hejun Li;Yulei Zhang;Kezhi Li;Q. Fu;Han Peng
为了提高C/C复合材料的耐烧蚀性能，采用超音速气氛等离子喷涂技术对SiC涂层C/C复合材料制备了ZrB2基涂层。研究了涂层的物相组成、显微结构和抗烧蚀性能。结果表明，超音速气氛等离子喷涂是制备致密ZrB2基涂层的有效方法。该涂层极大地提高了C/C复合材料的耐烧蚀性能。在氧乙炔炬中烧蚀 60 秒后，线性烧蚀速率为 0.17 μm/s。在消融中心，复杂的机械剥蚀和化学侵蚀决定了消融性能。烧蚀过程中ZrO2的形成可以部分阻止氧的扩散，从而使ZrB2基涂层具有良好的耐烧蚀性能。在过渡区，SiO2的生成阻止内涂层烧蚀，化学侵蚀成为主要机制。
In order to improve the ablation resistance of C/C composites, ZrB2-based coating was prepared by supersonic atmosphere plasma spraying for SiC-coated C/C composites. The phase composition, microstructure, and anti-ablation property of the coating were investigated. Results show that the supersonic atmosphere plasma spraying is an effective method to prepare a dense ZrB2-based coating. The coating largely improves the ablation resistance of C/C composites. The linear ablation rate is 0.17 μm/s after ablation for 60 s in oxyacetylene torch. In ablation center, the ablation performance is determined by complicated mechanical denudation and chemical erosion. The formation of ZrO2during ablation can partly prevent the diffusion of oxygen, which contributes to the good ablation resistance of ZrB2-based coating. In transition zone, the generation of SiO2prevents inner coating from ablation and the chemical erosion becomes the leading mechanism.