A study of NiCo0.6Fe0.2CrxSiAlTiy high-entropy alloys for applications as a high-temperature protective coating and a bond coat in thermal barrier coating systems

Wei Lin Hsu, Hideyuki Murakami, Hiroshi Araki, Makoto Watanabe, Seiji Kuroda, An Chou Yeh, Jien Wei Yeh

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    Abstract

    Atmospheric plasma spraying, high-velocity oxy-fuel spraying and warm spraying processes were used to prepare NiCo0.6Fe0.2Cr1.5SiAlTi0.2 and NiCo0.6Fe0.2Cr1.3SiAl high-entropy alloy coatings for the investigation of their high temperature properties. The best-performer, the warm-sprayed high-entropy alloy coating was then applied to a thermal barrier coating system as a bond coat over an Incoloy 800H substrate. Experimental results show that the investigated high-entropy alloy coatings have high hardness, excellent wear resistance and good oxidation resistance at 1100C that makes them promising overlay coatings for elevated temperature applications.

    Original languageEnglish
    Pages (from-to)C524-C531
    JournalJournal of the Electrochemical Society
    Volume165
    Issue number9
    DOIs
    Publication statusPublished - 2018 Jan 1

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    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Renewable Energy, Sustainability and the Environment
    • Condensed Matter Physics
    • Surfaces, Coatings and Films
    • Electrochemistry
    • Materials Chemistry

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