A modified dual-layer SiC oxidation protective coating for carbon/carbon composites prepared by one-step pack cementation |
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Authors: | Xinfa Qiang Hejun Li Yulei Zhang Qiangang Fu Jianfeng Wei Song Tian |
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Affiliation: | Carbon/carbon Composites Research Center, State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China |
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Abstract: | To improve the oxidation resistance of SiC coating produced by pack cementation for carbon/carbon composites, a modified SiC coating has been produced by one-step pack cementation by adding ferrocene in pack compositions. The as-received coating exhibited a dual-layer dense structure, and oxidation protective ability of SiC coating could be improved by introducing ferrocene. The modified coating could protect C/C composites from oxidation for more than 100 h at 1673 K in air. The weight loss of the coated C/C composites was considered to arise from deflection of penetrating cracks formed in outer layer from inner layer to C/C matrix. |
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Keywords: | A Ceramic matrix composites B Weight loss C Oxidation |
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