SiC-MoSi2/ZrO2-MoSi2 coating to protect C/C composites against oxidation

Qian Gang Fu, Jia Ping Zhang, Zheng Zhong Zhang, He Jun Li, Can Sun

Research output: Contribution to journalArticlepeer-review

31 Scopus citations

Abstract

To improve the oxidation resistance of carbon/carbon (C/C) composites in air at high temperatures, a SiC-MoSi2/ZrO2-MoSi 2 coating was prepared on the surface of C/C composites by pack cementation and slurry method. The microstructures and phase compositions of the coated C/C composites were analyzed by scanning electron microscopy and X-ray diffraction, respectively. The result shows that the SiC-MoSi 2/ZrO2-MoSi2 coating is dense and crack-free with a thickness of 250-300 μm. The preparation and the high temperature oxidation property of the coated composites were investigated. The as-received coating has excellent oxidation protection ability and can protect C/C composites from oxidation for 260 h at 1773 K in air. The excellent anti-oxidation performance of the coating is considered to come from the formation of ZrSiO4, which improves the stability of the coating at high temperatures.

Original languageEnglish
Pages (from-to)2113-2117
Number of pages5
JournalTransactions of Nonferrous Metals Society of China (English Edition)
Volume23
Issue number7
DOIs
StatePublished - Jul 2013

Keywords

  • carbon/carbon composites
  • coating
  • oxidation resistance
  • SiC-MoSi/ZrO-MoSi

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