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Synthesis, microstructure, and mechanical properties of polycrystalline Cu nano-foam

Published online by Cambridge University Press:  29 January 2018

Chang-Eun Kim ,
Raheleh M. Rahimi ,
Nia Hightower ,
Ioannis Mastorakos  and
David F. Bahr
Chang-Eun Kim
Affiliation:
School of Materials Engineering, Purdue University, 701 W. Stadium Ave, West Lafayette, IN47906-2045, USA
Raheleh M. Rahimi
Affiliation:
School of Materials Engineering, Purdue University, 701 W. Stadium Ave, West Lafayette, IN47906-2045, USA
Nia Hightower
Affiliation:
School of Materials Engineering, Purdue University, 701 W. Stadium Ave, West Lafayette, IN47906-2045, USA
Ioannis Mastorakos
Affiliation:
Department of Mechanical and Aeronautical Engineering, Clarkson University, Potsdam, NY13699, USA
David F. Bahr*
Affiliation:
School of Materials Engineering, Purdue University, 701 W. Stadium Ave, West Lafayette, IN47906-2045, USA
*
*(Email: [email protected])
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Abstract

A polycrystalline Cu foam with sub-micron ligament sizes was formed by creating a non-woven fabric via electrospinning with a homogeneous mixture of polyvinyl alcohol(PVA)-and copper acetate(Cu(Ac)2). Thermogravimetric measurement of the electrospun fabric of the precursor solution is reported. Oxidizing the precursor fabric at 773K formed an oxide nano-foam; subsequent heating at 573K with a reducing gas transformed the CuO nano-foam to Cu with a similar ligament and meso-scale pore size morphology. A cross-section prepared by focused ion beam lift-out shows the polycrystalline structure with multi-scale porosity. The mechanical property of the Cu nano-foam is measured by nano-indentation. The load-depth curves and deduced mechanical properties suggest that additional intra-ligament pores lead to unique structure-property relations in this non-conventional form of metal.

Keywords

nano-indentationtransmission electron microscopy (TEM)Cu
Type
Articles
Information
MRS Advances , Volume 3 , Issue 8-9: Theory, Characterization and Modeling , 2018 , pp. 469 - 475
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Copyright
Copyright © Materials Research Society 2018 

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