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Erosion Behavior of C/SiC Composites in Atomic Oxygen

Authors

  • Xiaochong Liu,

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

    Corresponding author
    • National Key Laboratory of Thermostructure Composite Materials, Northwestern Polytechnical University, Xi'an Shaanxi, People's Republic of China
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  • Litong Zhang,

    1. National Key Laboratory of Thermostructure Composite Materials, Northwestern Polytechnical University, Xi'an Shaanxi, People's Republic of China
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  • Xiaowei Yin,

    1. National Key Laboratory of Thermostructure Composite Materials, Northwestern Polytechnical University, Xi'an Shaanxi, People's Republic of China
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  • Ning Dong,

    1. National Key Laboratory of Thermostructure Composite Materials, Northwestern Polytechnical University, Xi'an Shaanxi, People's Republic of China
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  • Donglin Zhao,

    1. National Key Laboratory of Thermostructure Composite Materials, Northwestern Polytechnical University, Xi'an Shaanxi, People's Republic of China
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  • Zhiliang Hong,

    1. National Key Laboratory of Thermostructure Composite Materials, Northwestern Polytechnical University, Xi'an Shaanxi, People's Republic of China
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  • Zhonghua Li

    1. National Key Lab of Vacuum & Cryogenic Technology and Physics, Lanzhou Institute of Physics, Lanzhou, People's Republic of China
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  • The authors acknowledge the support of the major international (regional) joint research project under the Natural Science Foundation of China (contract no. 50820145202).

chenglf@nwpu.edu.cn

Abstract

A T300 carbon fiber and a SiC-coated C/SiC composite made from the same fiber were studied in atomic oxygen environment. The carbon fiber shows significant degradation while the erosion rate of SiC-coating of C/SiC is about 50 times lower. Evidence shows that Si is preferentially etched from the SiC surface. And XPS information showed that amorphous carbon and diamond-like carbonare periodically generated on the tested composite surface. Statistical analysis shows that the C/SiC specimens have no significant change in flexural properties after 1-year fluence AO treatment.

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