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Study of the reactive element effect in ODS iron-base alumina-formers [electronic resource].

Published:
Oakland, Calif. : United States. Dept. of Energy. Oakland Operations Office, 1996.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description:
8 pages : digital, PDF file
Additional Creators:
Oak Ridge National Laboratory, United States. Department of Energy. Oakland Operations Office, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary:
Iron aluminide (Fe₃Al) and FeCrAl compositions were dispersed with 15 different oxides in order to study the effect of oxygen- active dopants on high-temperature growth and adhesion of α- Al₂O₃ scales. In these model-type, oxide dispersion strengthened (ODS) systems, the chemical effects of various cation dopants were compared to the baseline effect of an Al₂O₃ oxide dispersion. By conducting isothermal and cyclic oxidation tests and by characterizing the oxidation product, effects on scale adhesion, growth rate and microstructure were evaluated. The dopants were categorized based on effectiveness in modifying the alumina scale. An Al₂O₃ dispersion yielded some improvement in oxidation behavior apparently by strengthening the relatively weak substrate. However, the type of improvements in adhesion and change in growth mechanism associated with addition of reactive elements such as Y were not achieved. In general, due to the weaker substrate and the inherently faster interfacial void formation, the dispersions were less effective in ODS Fe₃Al than in ODS FeCrAl.
Report Numbers:
E 1.99:conf-9605139--1
conf-9605139--1
Subject(s):
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Note:
Published through SciTech Connect.
05/01/1996.
"conf-9605139--1"
"DE96009885"
4. international symposium on high temperature corrosion and protection of materials, Les Embiez (France), 20-24 May 1996.
Pint, B.A.
Funding Information:
AC05-96OR22464
View MARC record | catkey: 14453034