발간논문

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Vol.39, No.6, 691 ~ 700, 2001
Title
Research Papers / Environment : Effect of Zr on the High Temperature Oxidation of Fe3Al Based Alloys
정환교Hwan Gyo Jung , 김규영Kyoo young Kim , F . H . Stott
Abstract
The oxidation behavior of the iron aluminides and the alloy of the same kind containing zirconium in air at 1200℃ has been examined. The oxide formed on the zirconium free Fe₃Al is highly convoluted and consists of equiaxed grains. On the other hand, with addition of zirconium to the Fe₃A1, distinct changes occur in the oxide morphology. The oxide is less convoluted and consists of columnar grains. The main factor responsible for this change is the facts that addition of zirconium into the external oxide suppresses the diffusion of aluminum within the external oxide. Other secondary advantages resulting from the addition of zirconium in the Fe₃Al is the strengthening of the Fe₃Al. Convolution of oxide can be aided by a weak substrate and weaker alloys would be expected to have more convoluted scales upon exposure to an oxidizing environment at sufficiently high temperature.
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