Microstructure and oxidation resistance of a plasma sprayed Mo-Si-B multiphase alloy coating

N. Nomura, T. Suzuki, K. Yoshimi, S. Hanada

Research output: Contribution to journalArticle

42 Citations (Scopus)

Abstract

A multiphase Mo-Si-B alloy coating can be successfully deposited onto the Mo-ZrC composite using a low pressure plasma spraying method. Microstructure of the plasma sprayed Mo-Si-B coating consists of Mo5Si3, Mo3Si and Mo5SiB2 phases, which are the same constituents as Mo-Si-B alloy powder. Nanostructure is formed in the Mo-Si-B coating with the eutectic composition owing to the rapid quenching effect by plasma spraying. The oxidation behavior of the Mo-Si-B coating shows rapid mass loss followed by slow mass gain at 1673 K in Ar-20%O2. Dense and adherent borosilicate glass formation passivates the coating against further oxidation at 1673 K.

Original languageEnglish
Pages (from-to)735-742
Number of pages8
JournalIntermetallics
Volume11
Issue number7
DOIs
Publication statusPublished - 2003 Jul 1

Keywords

  • A. Molybdenum silicides, nanostructured intermetallics
  • B. Oxidation
  • C. Plasma spraying

ASJC Scopus subject areas

  • Chemistry(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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