Grain boundary character dependence of oxygen grain boundary diffusion in α-Al2O3 bicrystals

Tsubasa Nakagawa, Hitoshi Nishimura, Isao Sakaguchi, Naoya Shibata, Katsuyuki Matsunaga, Takahisa Yamamoto, Yuichi Ikuhara

    研究成果: Article査読

    26 被引用数 (Scopus)

    抄録

    We measured oxygen diffusion coefficients (Dgb) along five grain boundaries (GBs) in alumina bicrystals by tracing 18O by secondary ion mass spectrometry. Although all boundaries are classified as coincident site lattice boundaries with relatively ordered structures, Dgb varied up to 103 times among them. On the other hand, the boundaries with identical boundary planes had relatively similar diffusivities as well as similar structures, regardless of Σ values. These results suggest that Dgb are related to GB atomic structures and hence the GB character, especially GB planes.

    本文言語English
    ページ(範囲)544-547
    ページ数4
    ジャーナルScripta Materialia
    65
    6
    DOI
    出版ステータスPublished - 2011 9

    ASJC Scopus subject areas

    • 材料科学(全般)
    • 凝縮系物理学
    • 材料力学
    • 機械工学
    • 金属および合金

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