Oxidation and ablation resistance of ZrB2-SiC-Si/B-modified SiC coating for carbon/carbon composites

ZrB2-SiC-Si/B-modified SIC coating was prepared on the surface of carbon/carbon (C/C) composites by two-step pack cementation. The coating could efficiently provide protection for C/C composites from oxidation and ablation. The improvement of oxidation resistance was attributed to the self-sealing property of the multilayer coating. A dense glassy oxide layer could afford the high temperature up to 2573 K and efficiently protect C/C composites from ablation. (C) 2012 Elsevier Ltd. All rights reserved.