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The Oxidation Behavior of an ODS Copper Alloy Cu–Al2O3

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Abstract

The oxidation behavior of Glidcop AL-15 (Cu-O.3 wt.% Al2O3), an ODS copper alloy of interest for aerospace structural application, was investigated by oxidation and two-step oxidation in a TGA. The results were compared with the oxidation kinetics of pure Cu and two other aerospace Cu alloys, GRCop-84 (Cu-8Cr-4Nb) and NARloy-Z (Cu-3Ag-O.5Zr). AL-15 exhibited the lowest oxidation rate from 500 to 650°C. The superiority in oxidation resistance is thought to result from the Al2O3, and the two-step oxidation results suggest the Al2O3 dissolves in the oxide scale, perhaps creating charge and stress fields that suppress oxidation by retarding the Cu diffusion rate.

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  1. QSS, Inc., NASA Glenn Research Center, Cleveland, OH, USA

    Linus U. Ogbuji

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  1. Linus U. Ogbuji
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Ogbuji, L.U. The Oxidation Behavior of an ODS Copper Alloy Cu–Al2O3 . Oxidation of Metals 62, 141–151 (2004). https://doi.org/10.1007/s11085-004-7804-x

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  • DOI: https://doi.org/10.1007/s11085-004-7804-x

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