Study of the SiC-TaSi2/MoSi2 multilayer oxidation protective coating for carbon/carbon composite

Dangshe Hou, Kezhi Li, Hejun Li, Qiangang Fu, Jian Wei, Yonggang He

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

A SiC-TaSi2/MoSi2 multilayer oxidation protective coating on carbon/carbon (C/C) composite was prepared by pack cementation. Effects of the contents of Ta and Mo in the second-step pack powders on the microstructure and high temperature anti-oxidation property of the multi-coating were studied by XRD, SEM, EDS and isothermal oxidation test. The results show that the multi-coating prepared at the mol ratio of 1:1 of Ta and Mo has a thicker, denser structure than those at the other mole ratios of 0:1, 1:3, 3:1, on which the stable and dense glassy SiO2 film could be formed during oxidation test. After 326 h oxidation in air at 1500°C and thermal cycling between 1500°C and room temperature for 23 times, the weight loss of the coated specimen was only 0.97%, implying that the multi-coating prepared at the mol ratio of 1:1 of Ta and Mo has excellent oxidation protective ability and thermal shock resistance.

Original languageEnglish
Pages (from-to)331-335
Number of pages5
JournalJinshu Xuebao/Acta Metallurgica Sinica
Volume44
Issue number3
StatePublished - Mar 2008

Keywords

  • C/C composites
  • Oxidation protection
  • SiC-TaSi/MoSi coating
  • Thermal shock resistance

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