Influence of copper-doping and iron-doping in cubic yttria-stabilized zirconia

M. Hartmanova, F.W. Poulsen, F. Hanic, K. Putyera, D. Tunega, A.A. Urusovskaya, T.V. Oreshnikova

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    Cubic yttria-stabilized zirconias (YSZs) (15 mol% Y2O3) doped with 2 wt% CuO and 0.3 wt% Fe2O3, respectively, have been compared with undoped YSZ. The lattice constants were found to increase in the sequence:aYSZ <aYSZ/Fe <aYSZ/cu. Vickers microhardness of polycrystalline YSZ/Fe exceeds that of polycrystalline YSZ/Cu, whereas the hardness of the single crystalline materials YSZ/Fe and YSZ/Cu are nearly identical and consistently lower than the polycrystalline values. Raman and infrared spectra reveal a breakdown of the selection rules, i.e. these techniques probe the local, non-cubic arrangement of oxygen vacancies. The findings are discussed in terms of a substitutional versus an interstitial-doping model.
    Original languageEnglish
    JournalJournal of Materials Science
    Volume29
    Issue number8
    Pages (from-to)2152-2158
    ISSN0022-2461
    DOIs
    Publication statusPublished - 1994

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