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Title: Synthesis and mechanical behavior of nanoporous nanotwinned copper

We synthesize nanoporous copper (NP Cu) through electrochemical dealloying of amorphous Cu{sub 0.41}Si{sub 0.59} under compressive residual stress. Transmission Electron Microscopy reveals that struts are nanocrystalline with grain size equal to the strut thickness. Moreover, a significant population of twins with spacing ∼7 nm is present within each imaged grain. The hardness of this nanocrystalline, nanotwinned NP Cu is approximately one order of magnitude greater than reports on NP Cu in the literature. The yield strength of individual struts inferred through dimensional analysis is approximately an order of magnitude greater than bulk copper and compares well with other nanostructured copper systems.
Authors:
;  [1] ; ; ;  [2] ;  [3]
  1. The Woodruff School of Mechanical Engineering, Georgia Institute of Technology, 801 Ferst Drive, Atlanta, Georgia 30332 (United States)
  2. Materials Physics and Applications Division, Center for Integrated Nanotechnologies, MPA-CINT, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
  3. Cross Keys High School, 1626 N Druid Hills Rd NE, Atlanta, Georgia 30319 (United States)
Publication Date:
OSTI Identifier:
22217750
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 103; Journal Issue: 24; 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; 36 MATERIALS SCIENCE; COPPER; CRYSTALS; ELECTROCHEMISTRY; FABRICATION; GRAIN SIZE; HARDNESS; NANOSTRUCTURES; RESIDUAL STRESSES; SYNTHESIS; THICKNESS; TRANSMISSION ELECTRON MICROSCOPY; YIELD STRENGTH