Abstract
To improve the anti-ablation property of carbon/carbon (C/C) composites, the double-layer coatings with SiC/Al2O3 as an inner layer and ZrB2/SiC/Ta2O5 as an outer layer were prepared by atmosphere plasma spraying. The phase composition, microstructure and element distribution of the coatings before and after ablation were analyzed using X-ray diffraction, scanning electron microscopy and energy dispersive X-ray spectroscopy, respectively. There are no cracks on the surface coating and the connection of two coatings and the SiC/Al2O3 coating with substrate is well. The distribution of elements Zr, Si and Ta on the coating are similar, which indicates the good homogeneity of coating. Ablation resistance of coated C/C was tested by the oxyacetylene flame at 1800 °C. The mosaic structure formed during the ablation process is conducive to prevent the diffusion of O2, and the Ta-Si-O glassy layer formed on the surface coating has a protective effect. The coating exhibits a good anti-ablation ability.
Translated title of the contribution | 等离子喷涂制备ZrB2/SiC/Ta2O5涂层抗烧蚀性能研究 |
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Original language | English |
Pages (from-to) | 72-77 |
Number of pages | 6 |
Journal | Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering |
Volume | 47 |
Publication status | Published - 1 Jul 2018 |
Keywords
- Ablation
- C/C
- Mosaic structure
- Ta-Si-O glassy layer