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    Log-normal nanograin-size distributions in nanostructured composites

    Access Status
    Fulltext not available
    Authors
    Lu, Chungsheng
    Lu, Y.
    Shen, Y.
    Mai, Y.
    Date
    2008
    Type
    Journal Article
    
    Metadata
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    Citation
    Lu, Chungsheng and Lu, Y.H. and Shen, Y. and Mai, Yiu-Wing. 2008. Log-normal nanograin-size distributions in nanostructured composites. Philosophical Magazine Letters. 88 (11): pp. 829-836.
    Source Title
    Philosophical Magazine Letters
    DOI
    10.1080/09500830802406237
    ISSN
    0950-0839
    Faculty
    Faculty of Science and Engineering
    Department of Mechanical Engineering
    School of Civil and Mechanical Engineering
    URI
    http://hdl.handle.net/20.500.11937/15930
    Collection
    • Curtin Research Publications
    Abstract

    A key challenge in the fabrication of superhard nanocomposite films is how to control the distribution of grain sizes in these materials. High-resolution transmission electron microscopy has been used to measure nanograin-size distributions in the Ti-B-N films with various B contents. The results show that the mean grain size decreases with increase of B content and the grain-size distribution conforms to a log-normal function when the hardness approaches a maximum value. The transition from normal to log-normal distributions can be determined by analysis in terms of a minimum information criterion. The origin of a log-normal size distribution probably results from heterogeneity arising from a diffusion-drift process.

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