The Oxidation Behavior of SiC–ZrC–SiC-Coated C/SiC Minicomposites at Ultrahigh Temperatures

Authors

  • Qiaomu Liu,

    1. National Key Laboratory of Thermostructure Composite Materials, Northwestern Polytechnical University, Xi'an 710072, China
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  • Litong Zhang,

    1. National Key Laboratory of Thermostructure Composite Materials, Northwestern Polytechnical University, Xi'an 710072, China
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  • Jia Liu,

    1. National Key Laboratory of Thermostructure Composite Materials, Northwestern Polytechnical University, Xi'an 710072, China
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  • Xingang Luan,

    1. National Key Laboratory of Thermostructure Composite Materials, Northwestern Polytechnical University, Xi'an 710072, China
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  • Laifei Cheng,

    1. National Key Laboratory of Thermostructure Composite Materials, Northwestern Polytechnical University, Xi'an 710072, China
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  • Yiguang Wang

    Corresponding author
    1. National Key Laboratory of Thermostructure Composite Materials, Northwestern Polytechnical University, Xi'an 710072, China
      †Author to whom correspondence should be addressed. e-mail: wangyiguang@nwpu.edu.cn
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    • *Member, The American Ceramic Society.


  • L. An—contributing editor

  • This work was financially supported by the Chinese Natural Science Foundation (Grant #90716023), the Research Fund of State Key Laboratory of Solidification Processing (Grant #21-TP2007), and partially supported by the Project “111.”

†Author to whom correspondence should be addressed. e-mail: wangyiguang@nwpu.edu.cn

Abstract

Carbon-fiber-reinforced SiC (C/SiC) minicomposites were fabricated by the chemical vapor infiltration process. A multilayer of SiC–ZrC–SiC was coated on the C/SiC minicomposites. As comparison, the C/SiC minicomposites with SiC coating were also fabricated. The oxidation behavior of the coated C/SiC minicomposites was studied in the temperature range of 1800°–2000°C in a combustion wind tunnel. The tensile strength of the coated C/SiC minicomposites before and after the oxidation was measured. The results indicated that the SiC–ZrC–SiC-coated C/SiC minicomposites performed better oxidation resistance at ultrahigh temperatures than the SiC-coated ones. The effect of the additional zirconium carbide layer on the oxidation behavior of the minicomposites was discussed.

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