Significant improvement of the oxidation resistance of MoSiBTiC-based multiphase alloys by Ti enrichment

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Abstract

The effects of the Ti content on the microstructure and oxidation behaviour of Mo–yTi–14Si–6C–6B (atom %) alloys were investigated. Enrichment with Ti of up to 54% did not change the four-phase constitution of the Moss, Mo5SiB2, Ti5Si3, or TiC phase, and improved the oxidation resistance of the alloy. The Mo–50Ti–14Si–6C–6B alloy exhibited the best oxidation resistance at 800–1200 °C through formation of a dense layer of TiO2. This improvement can be described in terms of a modified Pilling–Bedworth ratio, which indicated that the densest TiO2 layer formed on Moss grains.

Original languageEnglish
Article number108937
JournalCorrosion Science
Volume176
DOIs
Publication statusPublished - 2020 Nov

Keywords

  • Alloy
  • High temperature corrosion
  • Intermetallics
  • Oxidation
  • Titanium

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Science(all)

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