Grain boundary energy and atomic structure in alumina bicrystals

T. Watanabe, H. Yoshida, T. Saito, T. Yamamoto, Y. Ikuhara, T. Sakuma

    Research output: Contribution to journalArticlepeer-review

    17 Citations (Scopus)

    Abstract

    Grain boundary energy is a factor to affect the superplastic flow in ceramic materials. The grain boundary energy in alumina was estimated using high-purity bicrystals, by thermal grooving technique. The alumina bicrystals having a [0001] symmetrical tilt axis were fabricated by joining single crystals at high temperature. The bicrystals include low sigma boundaries (23, 27), high sigma boundaries (219 etc. ), small angle boundaries and high angle boundaries. Grain boundary energies were mostly in a range 0. 4-0. 7J/m2. Low sigma boundaries 23 and 27 took an extremely low energy about 0. 05 J/m2. The energy is related to the structure of grain boundaries.

    Original languageEnglish
    Pages (from-to)601-606
    Number of pages6
    JournalMaterials Science Forum
    Volume304-306
    Publication statusPublished - 1999

    Keywords

    • Atomic Force Microscopy
    • Bicrystal
    • Ceramics
    • Grain Boundary
    • HREM

    ASJC Scopus subject areas

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

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