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Title: Near-ideal strength in metal nanotubes revealed by atomistic simulations

Here we report extraordinary mechanical properties revealed by atomistic simulations in metal nanotubes with hollow interior that have been long overlooked. Particularly, the yield strength in [1 1 1] Au nanotubes is found to be up to 60% higher than the corresponding solid Au nanowire, which approaches the theoretical ideal strength in Au. Furthermore, a remarkable transition from sharp to smooth yielding is observed in Au nanotubes with decreasing wall thickness. The ultrahigh tensile strength in [1 1 1] Au nanotube might originate from the repulsive image force exerted by the interior surface against dislocation nucleation from the outer surface.
Authors:
;  [1] ;  [2]
  1. Department of Materials Science, Fudan University, 220 Handan Road, Shanghai 200433 (China)
  2. Department of Mechanical and Manufacturing Engineering, The University of Manitoba, 15Gillson Street, Winnipeg, Manitoba R3T 5V6 (Canada)
Publication Date:
OSTI Identifier:
22253875
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 103; Journal Issue: 23; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; DISLOCATIONS; METALS; NANOTUBES; SIMULATION; SURFACES; TENSILE PROPERTIES; THICKNESS; YIELD STRENGTH