Abstract

Ti-Al intermetallic compounds which can be used in gas turbine at elevated temperature were inves-tigated in order to improve oxidation resistance by the formation of protective oxide scale. Four Ti-Al alloys were prepared by plasma arc melting. As the amount of Al was increased among the alloys, oxida-tion resistance was improved by the formation of relatively purer Al2O3 layer. However, the alloys which have less amount of Al formed a duplex layer of Al2O3 and TiO2. When samples were oxidized in pure oxygen instead of air, oxidation resistance was improved because of formation of the purer Al2O3 layer.

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