Ablative property of ZrC-SiC multilayer coating for PIP-C/SiC composites under oxy-acetylene torch

To improve ablation resistance of PIP-C/SiC composites, ZrC-SiC multilayer coating was prepared on surface of PIP-C/SiC composites by chemical vapor deposition and slurry. The coating shows dense surface and outstanding anti-ablation ability. Compare with uncoated PIP-C/SiC, the linear and mass ablation rates of the coated PIP-C/SiC decrease by 59.5% and 50.3%, respectively, after ablation for 30 s. Large amounts of heat can be taken away by the gas generated during ablation, which is also helpful for protection for the composites. Crown Copyright (C) 2011 Published by Elsevier Ltd and Techna Group Sri. All rights reserved.