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Novel method of powder-based processing of copper nanofoams for their potential use in energy applications

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Title
Novel method of powder-based processing of copper nanofoams for their potential use in energy applications
Author(s)
Jo, Hyungyung; Cho, Yong-Hun; Choi, Myounggeun; Cho, Jinhan; Ji Hyun Um; Yung Eun Sung; Choe, Heeman
Publication Date
2014-05
Journal
MATERIALS CHEMISTRY AND PHYSICS, v.145, no.1-2, pp.6 - 11
Publisher
ELSEVIER SCIENCE SA
Abstract
This paper discusses a new method of powder-metallurgy processing to produce regular-structured Cu nanofoams or irregular-structured Cu foams containing both micropores and nanopores. Coarser Cu nanofoam struts (approximately 2.5 times larger) formed in the ribbon samples of the foams subjected to additional sintering at 900 C after initial lower-temperature sintering at 450 C than those formed in the ribbon samples of the foams subjected to additional sintering at 700 C. Furthermore, a much higher degree of strut continuity was observed in the Cu nanofoam sintered at 900 C, which should improve the ductility and structural integrity of the Cu nanofoam. This study can be considered as a framework for using a simple method of powder-based dealloying to produce nanoporous and micro/nanoporous metallic foams for a variety of energy-based applications requiring metallic foam materials with a high density of specific surface area. Although the dealloying process of achieving Cu nanofoams is not new, this powder-based method has significant implications because often a difficult and expensive material shaping process can be avoided by forming the precursor alloy with a near-net shape geometry in the method. 2014 Elsevier B.V. All rights reserved.
URI
https://pr.ibs.re.kr/handle/8788114/1029
ISSN
0254-0584
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > Journal Papers (저널논문)
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