Synthesis and mechanical behavior of nanoporous nanotwinned copper

Journal Article · Mon Dec 09 00:00:00 EST 2013 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4841455· OSTI ID:22217750

Liu, Ran; Antoniou, Antonia ^[1]; Zheng, Shijian; Kevin Baldwin, Jon; Mara, Nathan ^[2]; Kuthuru, Mary ^[3]

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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)

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.

• OSTI ID: 22217750
• Journal Information: Applied Physics Letters, Vol. 103, Issue 24; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
36 MATERIALS SCIENCE
COPPER
CRYSTALS
ELECTROCHEMISTRY
FABRICATION
GRAIN SIZE
HARDNESS
NANOSTRUCTURES
RESIDUAL STRESSES
SYNTHESIS
THICKNESS
TRANSMISSION ELECTRON MICROSCOPY
YIELD STRENGTH