Thermal stability enhancement of Cr2AlC coatings on Zr by utilizing a double layer diffusion barrier

Mráz Stanislav, Tyra Miléna, Moritz to Baben, Hans Marcus, Chen Xiang, Herrig Friederike , Konstantza Lambrinou, Jochen M. Schneider

    Research outputpeer-review


    Decomposition of Cr2AlC deposited onto a Zr substrate and vacuum-annealed is observed at 800 °C as Al diffuses from the MAX phase into the Zr substrate. A double layer of ZrN and AlN has been predicted by CALPHAD calculations to act as diffusion barrier between the Zr substrate and Cr2AlC. Experimental thermal stability investigations corroborate this prediction by confirming that the proposed double layer diffusion barrier coatings suppress the decomposition of Cr2AlC for one hour at temperatures of up to 1000 °C.
    Original languageEnglish
    Article number40
    Pages (from-to)1119-1124
    Number of pages9
    JournalJournal of the European Ceramic Society
    Issue number4
    StatePublished - Apr 2020

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