The oxidation mechanism of θ-Al2O3 scales

B. A. Pint, J. R. Martin, L. W. Hobbs

Research output: Contribution to journalArticlepeer-review

215 Scopus citations

Abstract

A nearly single-phase θ-Al2O3 scale has been grown on two FeCrAl alloys, according to a time-temperature-transformation relationship for the formation of external alumina scales. SIMS sputter depth profiles of the 18O 16O distribution consistently indicate that θ-Al2O3 scales grow primarily by the outward transport of Al. This mechanism is consistent with the observed scale microstructure and is significantly different from tracer profiles for α-Al2O3 scales.

Original languageEnglish
Pages (from-to)99-107
Number of pages9
JournalSolid State Ionics
Volume78
Issue number1-2
DOIs
StatePublished - May 1995
Externally publishedYes

Keywords

  • O/SIMS
  • Oxide scales
  • Phase transformation

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