The oxidation behavior of ODS iron aluminides

Conference · Wed May 01 04:00:00 EDT 1996

OSTI ID:237433

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

Oxide-dispersed Fe-28at.%Al-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{degrees}C in air and O{sub 2}. An Al{sub 2}O{sub 3} dispersion flattened the {alpha}-Al{sub 2}O{sub 3} scale, but produced none of the other reactive element effects and had an adverse influence on the long-term oxidation behavior. A Y{sub 2}O{sub 3} dispersion improved the alumina scale adhesion relative to a Zr alloy addition at 1200{degrees} and 1300{degrees}C. However, the Y{sub 2}O{sub 3} dispersion was not as effective in improving scale adhesion in Fe{sub 3}Al as it is in FeCrAl. This inferior performance is attributed to a larger amount of interfacial void formation on ODS Fe{sub 3}Al.

• Research Organization: Oak Ridge National Lab., TN (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC05-96OR22464
• OSTI ID: 237433
• Report Number(s): CONF-960191--1; ON: DE96010428
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ADHESION
ALUMINIUM ALLOYS
ALUMINIUM OXIDES
CHROMIUM ALLOYS
EXTRUSION
INTERMETALLIC COMPOUNDS
IRON BASE ALLOYS
METALLURGICAL EFFECTS
MICROSTRUCTURE
OXIDATION
SCALING
YTTRIUM OXIDES