C/SiC/MoSi2-SiC-Si multilayer coating for oxidation protection of carbon/carbon composites

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Abstract

C/SiC/MoSi2-SiC-Si oxidation protective multilayer coating for carbon/carbon (C/C) composites was prepared by pack cementation and slurry method. The microstructure, element distribution and phase composition of the as-received coating were analyzed by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD). The results show that the multilayer coating was composed of MoSi2, SiC and Si. It could effectively protect C/C composites against oxidation for 200 h with the mass loss of 3.25% at 1873 K in static air. The mass loss of the coated C/C composites results from the volatilization of SiO2 and the formation of cracks and bubble holes in the coating.

Original languageEnglish
Pages (from-to)2118-2122
Number of pages5
JournalTransactions of Nonferrous Metals Society of China (English Edition)
Volume23
Issue number7
DOIs
StatePublished - Jul 2013

Keywords

  • C/C composites
  • C/SiC
  • coating
  • MoSi
  • multilayer
  • oxidation
  • SiC

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