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Research Article | Open Access

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

Chaoqiang XUEa,b,c, Haijun ZHOUb,c, Jianbao HUb,c, Hongda WANGb,c, Jiayue XUa, Shaoming DONGb,c( )
School of Materials Science and Engineering, Shanghai Institute of Technology, Shanghai 200235, China
Structural Ceramics and Composites Engineering Research Center, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
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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)coatingreactive melt infiltration (RMI)alloy

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Journal of Advanced Ceramics
Volume 7 Issue 1,
March 2018
Pages 64-71
DOI: 10.1007/s40145-017-0257-x

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XUE C, ZHOU H, HU J, et al. Fabrication and microstructure of ZrB2–ZrC–SiC coatings on C/C composites by reactive melt infiltration using ZrSi2 alloy. Journal of Advanced Ceramics, 2018, 7(1): 64-71. https://doi.org/10.1007/s40145-017-0257-x

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Received: 02 September 2017
Revised: 18 December 2017
Accepted: 25 December 2017
Published: 20 January 2018
© 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.