title: Water vapor effect on high-temperature oxidation behavior of Fe3Al intermetallics.
abstract: Fe3Al intermetallics (Fe3Al, Fe3Al-Zr, Fe3Al-Zr,Mo and Fe3Al-Zr, Mo, Nb) were oxidized at 950 °C in dry and humid (11 vol% water) synthetic air. Thermogravimetric measurements showed that the oxidation rates of the tested intermetallics were lower in humid air than in dry air (especially for Fe3Al-Zr, Mo and Fe3Al-Zr, Mo, Nb). The addition of small amounts of Zr, Mo or Nb improved the kinetics compared with that of the undoped Fe3Al. Fe3Al showed massive spallation, whereas Fe3Al-Zr, Fe3Al-Zr, Mo and Fe3Al-Zr, Mo, Nb produced a flat, adherent oxide layer. The rapid transformation of transient alumina into alpha alumina may explain the decrease in the oxidation rate in humid air.
authors.affiliation: Institut Carnot de Bourgogne UMR 5209 CNRS-Université de Bourgogne, 9 av. A. Savary, BP 47870, 21078 Dijon Cedex, France.
authors.forename: Sebastian
authors.initials: S
authors.lastname: Chevalier
authors.affiliation: Institut Carnot de Bourgogne UMR 5209 CNRS-Université de Bourgogne, 9 av. A. Savary, BP 47870, 21078 Dijon Cedex, France; Department of Solid State Chemistry, Faculty of Materials Science and Ceramics, University of Sciences and Technology, Cracow, Poland.
authors.forename: Pitor
authors.initials: P
authors.lastname: Juzon
authors.affiliation: Department of Solid State Chemistry, Faculty of Materials Science and Ceramics, University of Sciences and Technology, Cracow, Poland.
authors.forename: Kazimierz
authors.initials: K
authors.lastname: Przybylski
authors.affiliation: Institut Carnot de Bourgogne UMR 5209 CNRS-Université de Bourgogne, 9 av. A. Savary, BP 47870, 21078 Dijon Cedex, France.
authors.forename: Jean-Pierre
authors.initials: JP
authors.lastname: Larpin
keywords: intermetallic compounds; iron aluminides; oxidation; transient alumina phases; water vapor