Preparation and ablation properties of ZrC-SiC coating for carbon/carbon composites by solid phase infiltration |
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Authors: | Zhaoqian LiHejun Li Wei LiJie Wang Shouyang ZhangJuan Guo |
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Institution: | a State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, PR China b School of Chemistry and Chemical Engineering, XianYang Normal College, XianYang 712000, PR China |
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Abstract: | A novel ZrC-SiC coating was prepared on carbon/carbon (C/C) composites surface by solid phase infiltration and the ablation properties of the ZrC-SiC coated C/C composites under oxyacetylene flame were studied. The results show that the coating prepared on the condition of optimum process parameters exhibits dense surface and outstanding anti-ablation ability. After ablation for 20 s, the mass ablation rates of the coated C/C composites can be lowered to 2.36 × 10−3 g/s, 37.1% reduction compared with uncoated C/C composites. The oxide layer composed of ZrO2 and SiO2 acts as oxygen diffusion barrier and the evaporation of ZrO2 and SiO2 absorbs a great amount of heat from the flame and reduces the erosive attack on the coating. |
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Keywords: | Carbon/carbon composites Solid phase infiltration ZrC-SiC coating Ablation properties |
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