Si-Al-Ir oxidation resistant coating for carbon/carbon composites by slurry dipping

Min Huang, Kezhi Li, Hejun Li, Qiangang Fu, Yu Wang

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

A Si-Al-Ir oxidation resistant coating was prepared for SiC coated carbon/carbon composites by slurry dipping. The phase composition, microstructure and oxidation resistance of the as-prepared Si-Al-Ir coating were studied by XRD (X-ray diffraction), SEM (scanning electron microscopy), and isothermal oxidation test at 1773 K in air, respectively. The surface of the as-prepared Si-Al-Ir coating was dense and the thickness was approximately 100 μm. Its anti-oxidation property was superior to that of the inner SiC coating. The weight loss of SiC/Si-Al-Ir coated carbon/carbon composites was less than 5 wt. pct after oxidation at 1773 K in air for 79 h. The local oxidation defects in the coating may result in the failure of the SiC/Si-Al-Ir coating. Printed by

Original languageEnglish
Pages (from-to)344-346
Number of pages3
JournalJournal of Materials Science and Technology
Volume25
Issue number3
StatePublished - May 2009

Keywords

  • Carbon/carbon composites
  • Coatings
  • Oxidation
  • Si-Al-Ir

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