Preparation of hierarchical porous metals by two-step liquid metal dealloying

A hierarchical porous metal has been prepared by two-step liquid metal dealloying using an alloy precursor containing two soluble components and two metal baths. After the first dealloying step, one of the soluble components is dissolved and a coarse porous structure is formed. After a shorter deall...

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Bibliographic Details
Published inScripta materialia Vol. 142; pp. 101 - 105
Main Authors Wada, Takeshi, Geslin, Pierre-Antoine, Kato, Hidemi
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.01.2018
Elsevier
Subjects
Cellular materials
Condensed Matter
Dealloying
Foams
Iron alloys
Materials Science
Physics
Porous material
Foams
Cellular materials
Iron alloys
Porous material
Dealloying
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Summary:A hierarchical porous metal has been prepared by two-step liquid metal dealloying using an alloy precursor containing two soluble components and two metal baths. After the first dealloying step, one of the soluble components is dissolved and a coarse porous structure is formed. After a shorter dealloying step in another melt, the other soluble component is dissolved and a fine porous structure is formed within the previously formed coarse ligaments. The resultant porous metal presents a hierarchical morphology with a bimodal pore distribution, resulting in a higher porosity and surface-area-to-volume ratio than what can be formed by one-step dealloying methods. [Display omitted]
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2017.08.038