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    Buckle, ruck and tuck: A proposed new model for the response of graphite to neutron irradiation

    168916_168917.pdf (777.6Kb)
    Access Status
    Open access
    Authors
    Heggie, M.
    Suarez-Martinez, Irene
    Davidson, C.
    Haffenden, G.
    Date
    2011
    Type
    Journal Article
    
    Metadata
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    Citation
    Heggie, M. and Suarez-Martinez, Irene and Davidson, C. and Haffenden, G. 2011. Buckle, ruck and tuck: A proposed new model for the response of graphite to neutron irradiation. Journal of Nuclear Materials. 413 (3): pp. 150-155.
    Source Title
    Journal of Nuclear Materials
    DOI
    10.1016/j.jnucmat.2011.04.015
    ISSN
    00223115
    School
    Nanochemistry Research Institute (Research Institute)
    Remarks

    NOTICE: This is the author's version of a work that was accepted for publication in Journal of Nuclear Materials. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of Nuclear Materials, 413, 3, 2011. DOI: 10.1016/j.jnucmat.2011.04.015

    URI
    http://hdl.handle.net/20.500.11937/9165
    Collection
    • Curtin Research Publications
    Abstract

    The default theory of radiation damage in graphite invokes Frenkel pair formation as the principal cause of physical property changes. We set out its inadequacies and present two new mechanisms that contribute to a better account for changes in dimension and stored energy. Damage depends on the substrate temperature, undergoing a change at approximately 250 C. Below this temperature particle radiation imparts a permanent, nano-buckling to the layers. Above it, layers fold, forming what we describe as a ruck and tuck defect. We present first principles and molecular mechanics calculations of energies and structures to support these claims. Necessarily we extend the dislocation theory of layered materials. We cite good experimental evidence for these features from the literature on radiation damage in graphite.

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