Ultrahigh Strength of Dislocation-Free Ni3Al Nanocubes

Authors

  • Robert Maaß,

    Corresponding author
    1. California Institute of Technology, Division of Engineering and Applied Sciences, 1200 E California Blvd, Pasadena, CA 91125, USA
    • California Institute of Technology, Division of Engineering and Applied Sciences, 1200 E California Blvd, Pasadena, CA 91125, USA.
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  • Lucas Meza,

    1. California Institute of Technology, Division of Engineering and Applied Sciences, 1200 E California Blvd, Pasadena, CA 91125, USA
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  • Bin Gan,

    1. Illinois Institute of Technology, 10 W. 32nd St., Chicago, IL 60616, USA
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  • Sammy Tin,

    1. Illinois Institute of Technology, 10 W. 32nd St., Chicago, IL 60616, USA
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  • Julia.R. Greer

    1. California Institute of Technology, Division of Engineering and Applied Sciences, 1200 E California Blvd, Pasadena, CA 91125, USA
    2. Kavli Nanoscience Institute, California Institute of Technology, Pasadena, CA 91125, USA
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Abstract

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Individual Ni3Al nanocubes under pressure are investigated by comparing the compressive strength of both dislocation-free and irradiated Ni3Al nanocubes. The results are dicussed in light of the size-dependent and size-independent strength of face-centered cubic (fcc) nanocrystals in the framework of dislocation nucleation at free surfaces. This study sheds more light on the understanding of fundamental deformation mechanisms and size-affected strength in dislocation-free metallic nanocrystals.

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