Microstructure and oxidation of multi-layer MoSi2-CrSi2-Si coatings for SiC coated carbon/carbon composites

Tao Feng, He Jun Li, Qian Gang Fu, Xue Tao Shen, Heng Wu

Research output: Contribution to journalArticlepeer-review

90 Scopus citations

Abstract

Multi-layer MoSi2-CrSi2-Si anti-oxidation coatings with different compositional ratios were prepared on the surface of SiC coated carbon/carbon (C/C) composites by a two-step pack cementation method. The microstructure and anti-oxidation performance of the coating were studied. The results show that the multi-layered coatings could protect the C/C composites from oxidation in air at 1773 K for 1000 h or 1873 K for 750 h, respectively. The anti-oxidation performance of the multi-layer MoSi2-CrSi2-Si coating is mainly attributed to their dense and microcrack-free structure, appropriate thermal expansion coefficient and the well dispersed MoSi2 and CrSi2 in the coating.

Original languageEnglish
Pages (from-to)3011-3017
Number of pages7
JournalCorrosion Science
Volume52
Issue number9
DOIs
StatePublished - Sep 2010

Keywords

  • A. Ceramic matrix composites
  • A. Intermetallic
  • C. Oxidation

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