Nanowire-toughened transition layer to improve the oxidation resistance of SiC-MoSi2-ZrB2 coating for C/C composites

To enhance the oxidation resistance of SiC-MoSi2-ZrB2 coating for C/C composites, pre-oxidation treatment and chemical vapor deposition were applied to construct a SiC nanowire-toughened inlaid transition layer between C/C and SiC-MoSi2-ZrB2 coating. The results show that the coating prepared with pre-oxidation and SiC nanowires has better oxidation resistance, which can protect C/C for 124 h at 1773 K in air with the weight loss per unit area of 1.1 mg cm(-2). The synergistic effect of the inlaid structure of the transition layer and SiC nanowires plays positive role on alleviating the mismatch of thermal expansion coefficient between C/C and SiC-MoSi2-ZrB2 coating. (C) 2016 Elsevier Ltd. All rights reserved.