Preparation and ablation properties of Hf(Ta)C co-deposition coating for carbon/carbon composites

• DOI: 10.1016/j.corsci.2012.09.016
• Publication Date: 2012-09-21T03:33:17Z
• Authors: Ya-lei Wang; Xiang Xiong; Guo-dong Li; Huai-fei Liu; Zhao-ke Chen; Wei Sun; Xue-jia Zhao
• Keywords: Reinforced carbon–carbon; Carbon fibers; Deposition

Abstract Continuous, uniform Hf(Ta)C coating was co-deposited on carbon/carbon composites by chemical vapor deposition. The phase composition, microstructure and ablation properties of the Hf(Ta)C coating are investigated. Results show that the as-prepared coating is a biphasic coating consisting of HfC and HfTaC2. The particle-stacked structure is effective to produce a crack free Hf(Ta)C coating and good adhesion between the coating and C/C composites. The Hf(Ta)C coating can effectively protect C/C composites from ablation. After 60 s ablation, the mass and linear ablation rates of coated sample are 0.01 ± 0.02 mg cm−2 s−1 and 0.46 ± 0.02 μm s−1, respectively.