TaB2-SiC-Si multiphase oxidation protective coating for SiC-coated carbon/carbon composites

Xuanru Ren, Hejun Li, Qiangang Fu, Yanhui Chu, Kezhi Li

Research output: Contribution to journalArticlepeer-review

75 Scopus citations

Abstract

To improve the oxidation resistance of the carbon/carbon (C/C) composites, a TaB2-SiC-Si multiphase oxidation protective ceramic coating was prepared on the surface of SiC coated C/C composites by pack cementation. Results showed that the outer multiphase coating was mainly composed of TaB2, SiC and Si. The multilayer coating is about 200μm in thickness, which has no penetration crack or big hole. The coating could protect C/C from oxidation for 300h with only 0.26×10-2g2/cm2 mass loss at 1773K in air. The formed silicate glass layer containing SiO2 and tantalum oxides can not only seal the defects in the coating, but also reduce oxygen diffusion rates, thus improving the oxidation resistance.

Original languageEnglish
Pages (from-to)2953-2959
Number of pages7
JournalJournal of the European Ceramic Society
Volume33
Issue number15-16
DOIs
StatePublished - Dec 2013

Keywords

  • Carbon/carbon composites
  • Coating
  • Oxidation resistance
  • TaB

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