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.
| Original language | English |
|---|---|
| Pages (from-to) | 3056-3063 |
| Number of pages | 8 |
| Journal | Ceramics International |
| Volume | 44 |
| Issue number | 3 |
| DOIs | |
| State | Published - 2018 |
Keywords
- Ablation resistance
- Carbon/carbon composites
- Reaction melt infiltration
- Supersonic atmosphere plasma spraying
- ZrB-SiC-ZrC coating