Characterization and atomic modeling of an asymmetric grain boundary

Hak Sung Lee, Teruyasu Mizoguchi, Takahisa Yamamoto, Suk Joong L. Kang, Yuichi Ikuhara

    Research output: Contribution to journalArticlepeer-review

    9 Citations (Scopus)

    Abstract

    Grain boundaries (GBs) significantly affect the properties of materials. In an effort to examine the phenomena at GBs, many model boundaries, typically symmetric tilt GBs, have been investigated. However, the geometries of symmetric tilt GBs are too restricted to represent commonly occurring interface phenomena properly in polycrystalline materials. Thus, a method of applying density functional theory (DFT) to asymmetric GBs has long been desired. Here, we present a simple geometric method and a new GB model with two surfaces which make it possible to characterize an asymmetric tilt GB and calculate the GB energetics. Our method can be extended to study other geometric asymmetric interfaces in various materials. The proposed technique thus paves the way for DFT-related studies of asymmetric interfaces.

    Original languageEnglish
    Article number195319
    JournalPhysical Review B - Condensed Matter and Materials Physics
    Volume84
    Issue number19
    DOIs
    Publication statusPublished - 2011 Nov 23

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics

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