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Ultrahigh Strength of Dislocation‐Free Ni 3 Al Nanocubes
Author(s) -
Maaß Robert,
Meza Lucas,
Gan Bin,
Tin Sammy,
Greer Julia.R.
Publication year - 2012
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201102603
Subject(s) - materials science , dislocation , nucleation , nanocrystal , deformation (meteorology) , composite material , condensed matter physics , nanotechnology , crystallography , thermodynamics , chemistry , physics
Individual Ni 3 Al nanocubes under pressure are investigated by comparing the compressive strength of both dislocation‐free and irradiated Ni 3 Al 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.