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Oxidation Behavior of ZrB2–SiC–TaC Ceramics

Authors

  • Yiguang Wang,

    1. National Key Laboratory of Thermostructure Composite, Northwestern Polytechnical University, Xi'an, Shaanxi, China
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    • Member, The American Ceramic Society.
  • Baisheng Ma,

    1. National Key Laboratory of Thermostructure Composite, Northwestern Polytechnical University, Xi'an, Shaanxi, China
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  • Lulu Li,

    1. National Key Laboratory of Thermostructure Composite, Northwestern Polytechnical University, Xi'an, Shaanxi, China
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  • Linan An

    Corresponding author
    1. Advanced Materials Processing and Analysis Center, University of Central Florida, Orlando, Florida
    • National Key Laboratory of Thermostructure Composite, Northwestern Polytechnical University, Xi'an, Shaanxi, China
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    • Member, The American Ceramic Society.

  • This work is financially supported by the Chinese Natural Science Foundation (Grant # 51172181), the Research Fund of State Key Laboratory of Solidification Processing (NWPU, China, Grant #21-TP2007), and 111 Project (B08040).

Author to whom correspondence should be addressed. e-mail: lan@mial.ucf.edu

Abstract

ZrB2–SiC–TaC ceramics with different content of TaC were prepared by hot-pressing at 1800°C in vacuum environment. The oxidation behavior of these ceramics was studied in the temperature range of 1200°C–1500°C in air. It was found that low concentration of TaC (10 vol%) deteriorated the oxidation resistance of ZrB2SiC, while high concentration of TaC (30 vol%) significantly improved the oxidation resistance of the ceramics. Reoxidation experiments indicated that the metallic species (tantalum and/or silicon) diffusing out of the materials into the oxides was initially involved in the controlling process.

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