Ablation resistance of ZrC-based composite coating with multi-layer structure for carbon/carbon composites above 2200 °C

The realization of the functionalized design of the coating is an effective measure to improve the ablation resistance of the coating. ZrC-based composite with multi-layer structure coating was designed and successfully prepared on the surface of SiC coated C/C composites. The ablation resistance of coating under different ablation times was evaluated. Results show that although the integrity of the coating was destroyed, the area close to the substrate still maintains a dense structure with the extension of ablation time. The coating could protect C/C composites against ablation for 240 s under the harsh ablation environments with temperature above 2200 ℃.