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Si-Al coating on pure molybdenum substrate and its cyclic oxidation behavior

  • Beihang University

Research output: Contribution to journalArticlepeer-review

Abstract

The halide-activated pack cementation method is utilized to codeposit aluminum and silicon on Mo substrate. Emphasis is placed on the microstructure and elevated-temperature oxidation resistance of coatings. The results show that hexagonal Mo (Si, Al)2 as a main phase and a little amount of the lower disilicide Mo5Si3, was formed on Mo substrate through the halide-activated pack cementation method. The resultant Si-Al coating on Mo substrate exhibits excellent cyclic oxidation resistance. The excellent cyclic oxidation resistance of the coatings is attributed to the formation of alumina on the coatings during the oxidation.

Original languageEnglish
Pages (from-to)672-676
Number of pages5
JournalActa Metallurgica Sinica (English Letters)
Volume17
Issue number5
StatePublished - Oct 2004

Keywords

  • Co-deposition
  • Coating
  • Cyclic oxidation resistance
  • Mo (Si, Al)

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