Articles
  • Oxidation behavior of C/C composites with B4C-SiC-ZrC-ZrB2 coating prepared by infiltration and pyrolysis

  • Xiao-Hua Zuoa,b,*, Zhi-Jun Dongc, Guan-Ming Yuanc, Zheng-Wei Cuic and Xuan-Ke Lic

  • aSchool of Chemistry & Chemical Engineering, Hubei Polytechnic University, Huangshi 435003, China
    bHubei Key Laboratory of Mine Environmental Pollution Control & Remediation, Huangshi 435003, China
    cHubei Province Key Laboratory of Coal Conversion & New Carbon Materials, Wuhan University of Science and Technology, Wuhan 430081, China

  • This article is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Polycarbosilane, B-Si and B-Si-Zr modification coal tar pitch were used as impregnate agent for infiltration and pyrolysis formation of carbon/carbon (abbreviated as C/C) composites with B4C-SiC-ZrC-ZrB2 coating. The density of the composites was examined to be 1.0 g ·cm-3, 1.4 g ·cm-3 and 1.8 g ·cm-3, respectively. The phase compositions, surface morphologies and element distributions of the coating were analyzed by X-ray diffraction (XRD) scanning electron microscopy (SEM) and energy dispervive spectroscopy (EDS), respectively. The result showed that the two composites with a density of 1.4 g ·cm-3 and 1.8 g ·cm-3 displayed compact microstructures. The oxidation behavior of the composites was studied by oxidation in air at temperatures from 800 to 1,550 oC for 1 h. The composites with a density of 1.8 g ·cm-3 exhibited a lower weight loss of 1.8 % after oxidation. B4C-SiC-ZrC-ZrB2 coating was found to provide the best protection by the precipitated B2O3, SiO2 and ZrO2 on the surface of the composites during the oxidation process, which were characterized by self-healing and anti-oxidation. The C/C composites with B4C-SiC-ZrC-ZrB2 coating performed well at high temperatures with the formation of complex oxides glass film that prevented oxygen from further spreading into the matrix


Keywords: B4C-SiC-ZrC-ZrB2 coating, C/C composites, Oxidation resistance, Self-healing

This Article

  • 2021; 22(1): 31-38

    Published on Feb 28, 2021

  • 10.36410/jcpr.2021.22.1.31
  • Received on May 18, 2020
  • Revised on Jul 15, 2020
  • Accepted on Oct 6, 2020

Correspondence to

  • Xiao-Hua Zuo

  • aSchool of Chemistry & Chemical Engineering, Hubei Polytechnic University, Huangshi 435003, China
    bHubei Key Laboratory of Mine Environmental Pollution Control & Remediation, Huangshi 435003, China
    Tel : +86 0714 6348825 Fax: +86 0714 6348814

  • E-mail: zuoxiaohua111@163.com