Oxidation-assisted ductility of aluminium nanowires

Fatih G. Sen, Ahmet T. Alpas, Adri C T Van Duin, Yue Qi

    Research output: Research - peer-reviewArticle

    • 8 Citations

    Abstract

    Oxidation can drastically change mechanical properties of nanostructures that typically have large surface-to-volume ratios. However, the underlying mechanisms describing the effect oxidation has on the mechanical properties of nanostructures have yet to be characterized. Here we use reactive molecular dynamics and show that the oxidation enhances the aluminium nanowire ductility, and the oxide shell exhibits superplastic behaviour. The oxide shell decreases the aluminium dislocation nucleation stress by increasing the activation volume and the number of nucleation sites. Superplasticity of the amorphous oxide shell is due to viscous flow as a result of healing of the broken aluminium-oxygen bonds by oxygen diffusion, below a critical strain rate. The interplay between the strain rate and oxidation rate is not only essential for designing nanodevices in ambient environments, but also controls interface properties in large-scale deformation processes.

    LanguageEnglish (US)
    Article number3959
    JournalNature Communications
    Volume5
    DOIs
    StatePublished - Jun 2 2014

    Profile

    Aluminum
    Nanowires
    Ductility
    Oxidation
    ductility
    nanowires
    aluminum
    oxidation
    Oxides
    oxides
    Nanostructures
    Oxygen
    Strain rate
    Nucleation
    Mechanical properties
    strain rate
    nucleation
    mechanical properties
    oxygen
    Molecular Dynamics Simulation

    ASJC Scopus subject areas

    • Biochemistry, Genetics and Molecular Biology(all)
    • Chemistry(all)
    • Physics and Astronomy(all)

    Cite this

    Sen, F. G., Alpas, A. T., Van Duin, A. C. T., & Qi, Y. (2014). Oxidation-assisted ductility of aluminium nanowires. Nature Communications, 5, [3959]. DOI: 10.1038/ncomms4959

    Oxidation-assisted ductility of aluminium nanowires. / Sen, Fatih G.; Alpas, Ahmet T.; Van Duin, Adri C T; Qi, Yue.

    In: Nature Communications, Vol. 5, 3959, 02.06.2014.

    Research output: Research - peer-reviewArticle

    Sen FG, Alpas AT, Van Duin ACT, Qi Y. Oxidation-assisted ductility of aluminium nanowires. Nature Communications. 2014 Jun 2;5. 3959. Available from, DOI: 10.1038/ncomms4959
    Sen, Fatih G. ; Alpas, Ahmet T. ; Van Duin, Adri C T ; Qi, Yue. / Oxidation-assisted ductility of aluminium nanowires. In: Nature Communications. 2014 ; Vol. 5.
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