Local atomic structure of a near-sigma 5 tilt grain boundary in MgO

Mitsuhiro Saito, Zhongchang Wang, Susumu Tsukimoto, Yuichi Ikuhara

    Research output: Contribution to journalArticle

    10 Citations (Scopus)

    Abstract

    Clear understanding of the structure-property relation in polycrystalline materials requires atomic-resolution imaging of grain boundary (GB) structures especially for the GBs with misalignments. In this study, we apply a bicrystal technique to fabricate the Σ5 and near-Σ5 GBs of MgO with tunable bonding angle and demonstrate that the misalignments in GBs could be compensated by a periodic displacement shift complete dislocation array. The atomic-resolution images reveal that the near-Σ5 GB is composed of an array of normal Σ5 GB structural units intercalated by deformed Σ17 GB units. The atomic-scale characterization presented is applicable to other GB species in a range of polycrystalline materials.

    Original languageEnglish
    Pages (from-to)5470-5474
    Number of pages5
    JournalJournal of Materials Science
    Volume48
    Issue number16
    DOIs
    Publication statusPublished - 2013 Aug 1

    Keywords

    • Atomic-scale structure
    • MgO
    • Tilt grain boundary
    • Transmission electron microscopy

    ASJC Scopus subject areas

    • Materials Science(all)
    • Mechanics of Materials
    • Mechanical Engineering

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