Journal of Advanced Ceramics

, Volume 7, Issue 1, pp 64–71 | Cite as

Fabrication and microstructure of ZrB2–ZrC–SiC coatings on C/C composites by reactive melt infiltration using ZrSi2 alloy

  • Chaoqiang Xue
  • Haijun Zhou
  • Jianbao Hu
  • Hongda Wang
  • Jiayue Xu
  • Shaoming Dong
Open Access
Research Article
  • 66 Downloads

Abstract

ZrB2–ZrC–SiC ternary coatings on C/C composites are investigated by reactive melt infiltration of ZrSi2 alloy into pre-coatings. Two different pre-coating structures, including porous B4C–C and dense C/B, are designed by slurry dip and chemical vapor deposition (CVD) process respectively. The coating prepared by reactive melt infiltration (RMI) into B4C–C presents a flat and smooth surface with a three-layer cross-sectional structure, namely interior SiC transition layer, gradient ZrB2–ZrC–SiC layer, and ZrB2–ZrC exterior layer. In comparison, the coating prepared by RMI into C/B shows a more granular surface with a different three-layer cross-sectional structure, interior unreacted B–C pre-coating layer, middle SiC layer, and exterior ZrB2–ZrC–ZrSi2 layer. The forming mechanisms of the specific microstructures in two coatings are also investigated and discussed in detail.

Keywords

ultra-high temperature ceramics (UHTCs) coating reactive melt infiltration (RMI) alloy 

Notes

Acknowledgements

The authors are grateful to the financial support from the National Key Research and Development Program of China (No. 2017YFB0703200), and the research grant from Science and Technology Commission of Shanghai Municipality (No. 16DZ2260600).

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© The Author(s) 2017

Open Access The articles published in this journal are distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/y/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

Authors and Affiliations

  • Chaoqiang Xue
    • 1
    • 2
    • 3
  • Haijun Zhou
    • 2
    • 3
  • Jianbao Hu
    • 2
    • 3
  • Hongda Wang
    • 2
    • 3
  • Jiayue Xu
    • 1
  • Shaoming Dong
    • 2
    • 3
  1. 1.School of Materials Science and EngineeringShanghai Institute of TechnologyShanghaiChina
  2. 2.Structural Ceramics and Composites Engineering Research Center, Shanghai Institute of CeramicsChinese Academy of SciencesShanghaiChina
  3. 3.State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of CeramicsChinese Academy of SciencesShanghaiChina

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