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Monolithic nanoporous copper by dealloying Mn–Cu

Published online by Cambridge University Press:  03 March 2011

J.R. Hayes ,
A.M. Hodge ,
J. Biener ,
A.V. Hamza  and
K. Sieradzki
J.R. Hayes*
Affiliation:
Lawrence Livermore National Laboratory, Chemistry and Materials Science Directorate, Livermore, California 94546
A.M. Hodge
Affiliation:
Lawrence Livermore National Laboratory, Chemistry and Materials Science Directorate, Livermore, California 94546
J. Biener
Affiliation:
Lawrence Livermore National Laboratory, Chemistry and Materials Science Directorate, Livermore, California 94546
A.V. Hamza
Affiliation:
Lawrence Livermore National Laboratory, Chemistry and Materials Science Directorate, Livermore, California 94546
K. Sieradzki
Affiliation:
Arizona State University, Department of Chemistry and Materials Science, Tempe, Arizona 85287-6106
*
a) Address all correspondence to this author. e-mail: JRHayes@llnl.gov
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Abstract

Monolithic nanoporous copper was synthesized by dealloying Mn0.7Cu0.3 by two distinct methods: potentiostatically driven dealloying and free corrosion. Both the ligament size and morphology were found to be highly dependent on the dealloying methods and conditions. For example, ligaments from 16 nm–125 nm were obtained by dealloying either electrochemically or by free corrosion, respectively. Optimization of the starting Mn–Cu alloy microstructure allowed us to synthesize uniform porous structures; but we found cracking to be unavoidable. Despite the presence of unavoidable defects, the nanoporous material still exhibits higher than expected yield strength.

Keywords

CorrosionNanostructurePorosity
Type
Articles
Information
Journal of Materials Research , Volume 21 , Issue 10 , October 2006 , pp. 2611 - 2616
Copyright
Copyright © Materials Research Society 2006

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