Articles
  • Improvement of oxidation resistance property of C/SiCO nanoporous ceramic composites with TaSi2-MoSi2-ZrB2-borosilicate glass coating

  • Xiafei Lia,b, Junzong Fengb, Guozhu Zhaoa,* and Xingyu Wua

  • aAerospace Technology Institute, China Aerodynamics Research and Development Center, Mianyang, Sichuan 621000, China
    bScience and Technology on Advanced Ceramic Fibers and Composites Laboratory, College of Aerospace Science and Engineering, National University of Defense Technology, Changsha, Hunan 410073, 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

To improve the oxidation resistance property of C/SiCO nanoporous ceramic composites, TaSi2-MoSi2-borosilicate glass coatings and TaSi2-MoSi2-ZrB2-Borosilicate glass coatings were prepared on the surface of C/SiCO nanoporous ceramic composites through slurry brushing combined with graphite powder embedding sintering process. The coatings are smooth, flat, without cracks, and tightly bonded to the substrate material. A study was conducted on the thermal stability of coated samples in an air atmosphere at 1600 ℃ and the high-temperature oxidation mechanism was analyzed. The results show that the coating effectively improves the thermal stability of SiCO nanoporous ceramic composites, and the addition of ZrB2 further improves the oxidation resistance and ablation resistance of the coated samples. At high temperatures, the borosilicate glass in the coating displays a viscous flow state, and the SiO2 glass layer formed on the coatings surface serves as an oxygen barrier. At the same time, the coating has a particle reinforced glass structure inside, which avoid the growth and propagation of cracks and reduce oxygen diffusion channels effectively


Keywords: TaSi2-MoSi2-ZrB2-borosilicate glass coating, C/SiCO porous ceramics, high temperature resistance, oxidation resistance, ablation resistance

This Article

  • 2023; 24(5): 816-826

    Published on Oct 31, 2023

  • 10.36410/jcpr.2023.24.5.816
  • Received on Jul 1, 2023
  • Revised on Jul 25, 2023
  • Accepted on Jul 28, 2023

Correspondence to

  • Guozhu Zhao

  • Aerospace Technology Institute, China Aerodynamics Research and Development Center, Mianyang, Sichuan 621000, China

  • E-mail: zhaoguozhu@cardc.cn