Oxidation Behavior of Hot Pressed ZrB2-ZrC-SiC Ceramic Composites

Authors

  • Yue Zhang,

    1. Key Laboratory of Aerospace Materials and Performance (Ministry of Education), School of Materials Science and Engineering, Beihang University, Beijing, People's Republic of China
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  • Dong Gao,

    Corresponding author
    1. Key Laboratory of Aerospace Materials and Performance (Ministry of Education), School of Materials Science and Engineering, Beihang University, Beijing, People's Republic of China
    2. AVIC Commercial Aircraft Engine CO., LTD, Shanghai, People's Republic of China
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  • Chunlai Xu,

    1. National Key Laboratory of Advanced Functional Composite Materials Technology, Beijing, People's Republic of China
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  • Yang Song,

    1. National Key Laboratory of Advanced Functional Composite Materials Technology, Beijing, People's Republic of China
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  • Xiaobin Shi

    1. National Key Laboratory of Advanced Functional Composite Materials Technology, Beijing, People's Republic of China
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Abstract

Dense ZrB2-SiC ceramics containing 40 vol% ZrC particles are fabricated via hot pressing method. Then the sintered ceramics are oxidized in air up to 1500°C, and the oxidation kinetics of the ceramic composites is deduced in combination with the reacted fraction curves. As indicated by the experimental results, the oxidation kinetics changes from reaction-controlled process to diffusion-controlled one with increasing of oxidation temperature. In addition, the oxidation kinetics parameters are obtained, which indicates that the oxidation resistance decays at elevated temperatures. Furthermore, the evolution of surface morphology and oxide scale during oxidation process is clarified.

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