Ultra-high temperature ceramic coating for carbon/carbon composites against ablation above 2000 K |
| |
Authors: | Yulei Zhang Haohao Wang Tao Li Yanqin Fu Jincui Ren |
| |
Affiliation: | State Key Laboratory of Solidification Processing, C/C Composites Research Center, Northwestern Polytechnical University, Xi''an 710072, PR China |
| |
Abstract: | To improve the ablation resistance of carbon/carbon composites at the temperature above 2000 K, a ZrB2-SiC-ZrC ultra-high temperature ceramic coating was prepared by combination of supersonic atmosphere plasma spray (SAPS) and reaction melt infiltration. The micro-holes in ZrB2-Si-ZrC coating prepared by SAPS were effectively filled and the compactness and interface compatibility between the coating and C/C composites was improved through the reaction melt infiltration process. The ultra-high temperature ceramic coating exhibited good ablation resistance under oxyacetylene torch ablation above 2000 K. After ablation for 120 s, the mass and linear ablation rates of the ZrB2-SiC-ZrC coated C/C samples were only ?0.016 × 10?3 g/s and 1.30 µm/s, respectively. Good ablation resistance of the ultra-high temperature ceramic coating is mainly attributed to the dense coating structure and the improvement of interface compatibility between the coating and C/C composites. |
| |
Keywords: | Carbon/carbon composites Ablation resistance Supersonic atmosphere plasma spraying Reaction melt infiltration |
本文献已被 ScienceDirect 等数据库收录! |