Log-normal nanograin-size distributions in nanostructured composites

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

6 Scopus Citations
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Author(s)

Detail(s)

Original languageEnglish
Pages (from-to)829-836
Journal / PublicationPhilosophical Magazine Letters
Volume88
Issue number11
Publication statusPublished - Nov 2008

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.

Research Area(s)

  • Grain growth, Grain size, Nanostructured thin films, Statistical physics, Superhardness

Citation Format(s)

Log-normal nanograin-size distributions in nanostructured composites. / Lu, C.; Lu, Y. H.; Shen, Y. G. et al.
In: Philosophical Magazine Letters, Vol. 88, No. 11, 11.2008, p. 829-836.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review