Effect of Cation Doping on the Superplastic Flow in Yttria-Stabilized Tetragonal Zirconia Polycrystals

Junpei Mimurada, Manabu Nakano, Kazutaka Sasaki, Yuichi Ikuhara, Taketo Sakuma

    Research output: Contribution to journalArticle

    45 Citations (Scopus)

    Abstract

    The superplastic characteristics of various cation-doped yttria-stabilized tetragonal zirconia polycrystals (Y-TZP) were examined. For 1 mol% cation doping the true stress of Y-TZP is very dependent on the ionic radii of the doped cations; for instance, smaller cation radii give rise to lower true stress when compared with the other compositions for the same grain size, strain rate, and testing temperature. The altered true stress level must be due to the change in diffusivity of the accommodation process for grain boundary sliding caused by the addition of cations in ZrO2. The strain to failure of the doped zirconia is affected by both ionic radius and valence of the dopant cations.

    Original languageEnglish
    Pages (from-to)1817-1821
    Number of pages5
    JournalJournal of the American Ceramic Society
    Volume84
    Issue number8
    DOIs
    Publication statusPublished - 2001 Aug

    ASJC Scopus subject areas

    • Ceramics and Composites
    • Materials Chemistry

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