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Journal of Inorganic Materials

Journal of Inorganic Materials >

2008 , Vol. 23 >Issue 4: 779 - 783

DOI: https://doi.org/10.3724/SP.J.1077.2008.00779

Research Paper

Preparation and Structure of MoSi2-Mo5Si3/SiC Multi-coating for Carbon/Carbon Composites

  • YANG XIN ,
  • ZOU Yan-Hong ,
  • HUANG Qi-Zhong ,
  • SU Zhe-An ,
  • WANG Xiu-Fei ,
  • ZHANG Ming-Yu
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  • 1. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China;
    2. Materials Science and Engineering Post-doctoral Research Center, Central South Vniversity, Changsha 410083, China

Received date: 2007-07-28

  Revised date: 2007-09-07

  Online published: 2008-07-20

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Abstract

To prevent carbon/carbon composites from oxidation, a MoSi2-Mo5Si3/SiC multi-coating was prepared by the
chemical vapor reaction (CVR) technique and slurry method. The formation mechanism and structure of the multi-coating were studied by using XRD, SEM and EDS analysis, and then the anti-oxidation property of the multi-coating was investigated. The results show that the thickness of obtained coating is about 400μm, and the main phase are composed of β-SiC, MoSi2 and Mo5Si3. After oxidation in air at 1350℃ for 10h, the weight loss of the multi-coating is only 1.21%, which is obviously lower than that of single-layer SiC coating. The phases of MoSi2 and Mo5Si3 formed in the MoSi2-Mo5Si3/SiC multi-coating fill the cracks and holes in the monolayer SiC coating, which can improve the anti-oxidation ability of the multi-coating. So the multi-coating made by the complex technology possesses more compact structure and better anti-oxidation property.

Key words： carbon/carbon composites; anti-oxidation coating; MoSi2; SiC

Cite this article

YANG XIN , ZOU Yan-Hong , HUANG Qi-Zhong , SU Zhe-An , WANG Xiu-Fei , ZHANG Ming-Yu . Preparation and Structure of MoSi2-Mo5Si3/SiC Multi-coating for Carbon/Carbon Composites[J]. Journal of Inorganic Materials, 2008 , 23(4) : 779 -783 . DOI: 10.3724/SP.J.1077.2008.00779

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