Korean Institute of Surface Engineering

pISSN : 1225-8024 | eISSN : 3399-8403


공학

한국표면공학회지 (33권5호 365-372)

The oxidation of Fe-(21.8, 24.1, 27.2)%Al intermetallics

Fe-(21.8, 24.1, 27.2)%Al 금속간 화합물의 고온 산화

김기영;이동복;

성균관대학교 플라즈마 응용표면기술연구센터;

Abstract

Pure $Fe_3$Al alloys with three different compositions of Fe-21.8%Al, Fe-24.1%Al and Fe-27.2%Al were prepared by vacuum induction melting followed by homogenization and hot forging. The long-time oxidation behavior of the prepared alloys was studied at 1073, 1273 and 1473k in air. The oxidation resistance greatly increased with an increase in Al contents. Thin and uniform oxide scales were always formed on Fe-27.2%Al, while thick and fragile oxide scales were formed on Fe-(21.8, 24.1%)Al. Internal oxidation was observed in Fe-(21.8, 24.1%)Al, when oxidized above 1273K. The major oxidation product of all the oxidized alloys was always $alpha$-$Al_2$$O_3$.

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