Transient creep in fine-grained polycrystalline Al2O3 with Lu3+ ion segregation at the grain boundaries

Hidehiro Yoshida, Yuichi Ikuhara, Taketo Sakuma

    Research output: Contribution to journalArticle

    13 Citations (Scopus)

    Abstract

    The creep deformation in fine-grained polycrystalline Al2O3 is highly suppressed by the addition of 0.1 mol% LuO1.5. The transient creep behavior in Lu-doped Al2O3 was examined at the testing temperature of 1250-1350 °C, and the data were analyzed in terms of the effect of stress and temperature on the extent of transient time and strain. The experimental data on the transient creep in Lu-doped Al2O3 showed good agreement with the prediction from a time function of the transient and the steady-state creep associated with grain boundary sliding as well as an undoped one. The difference in the transient creep between Lu-doped and undoped Al2O3 can also be explained by the retardation of grain boundary diffusion due to the Lu3+ ions segregation in the grain boundaries.

    Original languageEnglish
    Pages (from-to)716-720
    Number of pages5
    JournalJournal of Materials Research
    Volume16
    Issue number3
    DOIs
    Publication statusPublished - 2001 Mar

    ASJC Scopus subject areas

    • Materials Science(all)
    • Condensed Matter Physics
    • Mechanics of Materials
    • Mechanical Engineering

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