Grain boundary mobility and grain growth behavior in polycrystals with faceted wet and dry boundaries

Byung Kwon Yoon, Si Young Choi, Takahisa Yamamoto, Yuichi Ikuhara, Suk Joong L. Kang

    Research output: Contribution to journalArticle

    27 Citations (Scopus)

    Abstract

    The effect of an intergranular amorphous film on grain growth behavior has been studied in a faceted model system, BaTiO3. We prepared two kinds of samples with and without intergranular amorphous films but with the same grain size and density. During annealing the samples at 1350 °C in air, abnormal grain growth occurred in samples with intergranular amorphous films while grain growth was inhibited in samples with dry boundaries, indicating the presence of a pinning force in samples with dry boundaries. To compare the mobilities of dry and wet boundaries, single crystal and polycrystal bilayer samples with or without amorphous films were prepared and annealed at 1340 °C. In contrast to the observed grain growth behavior in polycrystals, the growth of the single crystal into the polycrystal with dry boundaries was faster than that into the polycrystal with wet boundaries, demonstrating the higher mobility of a dry boundary, unlike the conventional understanding.

    Original languageEnglish
    Pages (from-to)2128-2135
    Number of pages8
    JournalActa Materialia
    Volume57
    Issue number7
    DOIs
    Publication statusPublished - 2009 Apr 1

    Keywords

    • Grain boundary migration
    • Grain growth
    • Interface structure
    • Intergranular amorphous film
    • Single crystal growth

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Ceramics and Composites
    • Polymers and Plastics
    • Metals and Alloys

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