Size effects on the mechanical behavior of nanoporous Au.
Nano Lett
; 6(10): 2379-82, 2006 Oct.
Article
em En
| MEDLINE
| ID: mdl-17034115
ABSTRACT
Recent nanomechanical tests on submicron metal columns and wires have revealed a dramatic increase in yield strength with decreasing sample size. Here, we demonstrate that nanoporous metal foams can be envisioned as a three-dimensional network of ultrahigh-strength nanowires, thus bringing together two seemingly conflicting properties high strength and high porosity. Specifically, we characterized the size-dependent mechanical properties of nanoporous gold using a combination of nanoindentation, column microcompression, and molecular dynamics simulations. We find that nanoporous gold can be as strong as bulk Au, despite being a highly porous material, and that the ligaments in nanoporous gold approach the theoretical yield strength of Au.
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MEDLINE
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Nanoestruturas
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Idioma:
En
Ano de publicação:
2006
Tipo de documento:
Article