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

Hyungyung Jo, Yong Hun Cho, Myounggeun Choi, Jinhan Cho, Ji Hyun Um, Yung Eun Sung, Heeman Choe

    Research output: Contribution to journalArticlepeer-review

    31 Citations (Scopus)

    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.

    Original languageEnglish
    Pages (from-to)6-11
    Number of pages6
    JournalMaterials Chemistry and Physics
    Volume145
    Issue number1-2
    DOIs
    Publication statusPublished - 2014 May 15

    Bibliographical note

    Funding Information:
    This research was supported by the Pioneer Research Center Program through the National Research Foundation (NRF) of Korea funded by the Ministry of Education, Science, and Technology (2011-0001684). HC also acknowledges support from the Basic Science Research Program (2010-0005775) and the Priority Research Centers Program (2009-0093814; 2010-0029106) through the National Research Foundation (NRF) of Korea funded by the Ministry of Education, Science, and Technology. YS also acknowledges support from the Institute for Basic Science (IBS).

    Keywords

    • Alloys
    • Etching
    • Intermetallic compounds
    • Microporous materials
    • Powder metallurgy

    ASJC Scopus subject areas

    • General Materials Science
    • Condensed Matter Physics

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