Burgers vector of crack tip dislocations in magnesium oxide crystals

Kenji Higashida, Syunji Okazaki, Tatsuya Morikawa, Ryuta Onodera

    Research output: Contribution to journalArticlepeer-review

    14 Citations (Scopus)

    Abstract

    Crack tip dislocations in MgO thin crystals have been investigated using a high voltage electron microscope (HVEM). Particular emphasis is laid on determining the sign of the Burgers vectors of those dislocations, because it is essentially important for understanding the fracture toughness of materials. For this determination, image simulation for a dislocation inclined to the foil surface has been performed, and characteristics of image contrast are discussed. Crack tip shielding due to dislocations is also discussed briefly.

    Original languageEnglish
    Pages (from-to)967-974
    Number of pages8
    JournalMaterials Transactions, JIM
    Volume39
    Issue number9
    DOIs
    Publication statusPublished - Sep 1998

    All Science Journal Classification (ASJC) codes

    • Engineering(all)

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