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A Further Study of the Beneficial Effects of Yttrium on Oxide Scale Properties and High-Temperature Wear of Stellite 21

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Abstract

Alloying yttrium to Co-based alloys has been proven to considerably improve their oxide scales that play an important role in resisting wear at elevated temperatures. In addition to the formation of Y2O3 phase in the oxide scale, the yttrium addition may also change the oxidation mechanism, which could be responsible for many benefits of yttrium to the wear resistance of this alloy at elevated temperatures. In this study, the effect of yttrium on the oxidation behavior of Stellite 21 alloy was investigated and correlated to the changes in microstructure and improvement in properties of the oxide scale formed at 600 °C which in turn improved high-temperature wear behavior.

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Authors and Affiliations

  1. Department of Chemical and Materials Engineering, University of Alberta, T6G 2G6, Edmonton, AB, Canada

    Iulian Radu & D. Y. Li

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  1. Iulian Radu
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  2. D. Y. Li
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Correspondence to Iulian Radu.

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Radu, I., Li, D.Y. A Further Study of the Beneficial Effects of Yttrium on Oxide Scale Properties and High-Temperature Wear of Stellite 21. Tribol Lett 30, 27–34 (2008). https://doi.org/10.1007/s11249-008-9308-3

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  • DOI: https://doi.org/10.1007/s11249-008-9308-3

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