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AMoSi2–SiC–Si/MoSi2COATING TO PROTECT CARBON/CARBON COMPOSITES AGAINST OXIDATION AT 1700°C

Author

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  • QIAN-GANG FU

    (C/C Composites Research Center, Key Laboratory of Ultrahigh Temperature Composites, Northwestern Polytechnical University, Xi'an 710072, P. R. China)

  • HE-JUN LI

    (C/C Composites Research Center, Key Laboratory of Ultrahigh Temperature Composites, Northwestern Polytechnical University, Xi'an 710072, P. R. China)

  • YONG-JIE WANG

    (C/C Composites Research Center, Key Laboratory of Ultrahigh Temperature Composites, Northwestern Polytechnical University, Xi'an 710072, P. R. China)

  • KE-ZHI LI

    (C/C Composites Research Center, Key Laboratory of Ultrahigh Temperature Composites, Northwestern Polytechnical University, Xi'an 710072, P. R. China)

  • HENG WU

    (C/C Composites Research Center, Key Laboratory of Ultrahigh Temperature Composites, Northwestern Polytechnical University, Xi'an 710072, P. R. China)

Abstract

In order to protect carbon/carbon(C/C)composites from oxidation at 1700°C, aMoSi2–SiC–Si/MoSi2coating was prepared on the surface of these composites by a simple and effective method. TheMoSi2–SiC–Siinner layer was obtained by pack cementation, and theMoSi2outer layer was prepared by slurry coating using silicon-sol as the caking agent. The microstructures of the as-prepared coating were examined by X-ray diffraction and scanning electron microscope. Oxidation test shows that, the as-received coating can protectC/Ccomposites from oxidation for more than 107 h at 1700°C in air. The excellent anti-oxidation ability of this coating is attributed to its dense structure and the formation of theSiO2film on the coating surface during oxidation.

Suggested Citation

  • Qian-Gang Fu & He-Jun Li & Yong-Jie Wang & Ke-Zhi Li & Heng Wu, 2009. "AMoSi2–SiC–Si/MoSi2COATING TO PROTECT CARBON/CARBON COMPOSITES AGAINST OXIDATION AT 1700°C," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 16(03), pages 437-440.
    • Handle: RePEc:wsi:srlxxx:v:16:y:2009:i:03:n:s0218625x09012822
    DOI: 10.1142/S0218625X09012822
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