The oxidation behavior of ODS iron aluminides

B. A. Pint; P. F. Tortorelli; I. G. Wright

doi:10.1002/maco.19960471202

The oxidation behavior of ODS iron aluminides

B. A. Pint, P. F. Tortorelli, I. G. Wright

Materials Science and Technology Div

Research output: Contribution to journal › Article › peer-review

54 Scopus citations

Abstract

Oxide-dispersed Fe-28at.% AI-2 %Cr alloys were produced by a powder metallurgy technique followed by hot extrusion. A variety of stable oxides were added to the base alloy to assess the effect of these dopants on the oxidation behavior at 1200 °C in air and O₂. An Al₂O₃ dispersion flattened the α-Al₂O₃ scale, but produced none of the other reactive element effects and had an adverse influence on the long-term oxidation behavior. A Y₂O₃, dispersion improved the alumina scale adhesion relative to a Zr alloy addition at 1200 and 1300°C. However, the Y₂O₃ dispersion was not as effective in improving scale adhesion in Fe₃Al as it is in FeCrAl. This inferior performance is attributed to a larger amount of interfacial void formation on ODS Fe₃Al.

Original language	English
Pages (from-to)	663-674
Number of pages	12
Journal	Materials and Corrosion
Volume	47
Issue number	12
DOIs	https://doi.org/10.1002/maco.19960471202
State	Published - Dec 1996

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abstract = "Oxide-dispersed Fe-28at.% AI-2 %Cr alloys were produced by a powder metallurgy technique followed by hot extrusion. A variety of stable oxides were added to the base alloy to assess the effect of these dopants on the oxidation behavior at 1200 °C in air and O2. An Al2O3 dispersion flattened the α-Al2O3 scale, but produced none of the other reactive element effects and had an adverse influence on the long-term oxidation behavior. A Y2O3, dispersion improved the alumina scale adhesion relative to a Zr alloy addition at 1200 and 1300°C. However, the Y2O3 dispersion was not as effective in improving scale adhesion in Fe3Al as it is in FeCrAl. This inferior performance is attributed to a larger amount of interfacial void formation on ODS Fe3Al.",

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AU - Pint, B. A.

AU - Tortorelli, P. F.

AU - Wright, I. G.

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AB - Oxide-dispersed Fe-28at.% AI-2 %Cr alloys were produced by a powder metallurgy technique followed by hot extrusion. A variety of stable oxides were added to the base alloy to assess the effect of these dopants on the oxidation behavior at 1200 °C in air and O2. An Al2O3 dispersion flattened the α-Al2O3 scale, but produced none of the other reactive element effects and had an adverse influence on the long-term oxidation behavior. A Y2O3, dispersion improved the alumina scale adhesion relative to a Zr alloy addition at 1200 and 1300°C. However, the Y2O3 dispersion was not as effective in improving scale adhesion in Fe3Al as it is in FeCrAl. This inferior performance is attributed to a larger amount of interfacial void formation on ODS Fe3Al.

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The oxidation behavior of ODS iron aluminides

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