Kinetics and morphological evolution of liquid metal dealloying

McCue, Ian; Gaskey, Bernard; Geslin, Pierre-Antoine; Karma, Alain; Erlebacher, Jonah

doi:10.1016/j.actamat.2016.05.032

Kinetics and morphological evolution of liquid metal dealloying

Journal Article · Tue May 31 00:00:00 EDT 2016 · Acta Materialia

DOI:https://doi.org/10.1016/j.actamat.2016.05.032· OSTI ID:1906131

McCue, Ian ^[1]; Gaskey, Bernard ^[2]; Geslin, Pierre-Antoine ^[3]; Karma, Alain ^[4]; ^[2]

Johns Hopkins Univ., Baltimore, MD (United States); Northeastern.edu
Johns Hopkins Univ., Baltimore, MD (United States)
Northeastern Univ., Boston, MA (United States); Univ. of Lyon (France)
Northeastern Univ., Boston, MA (United States)

Liquid metal dealloying (LMD) has recently emerged as a novel technique to fabricate bulk nanostructures using a bottom-up self-organization method, but the literature lacks fundamental studies of this kinetic process. In this work, we conduct an in-depth study of the kinetics and fundamental microstructure evolution mechanisms during LMD using Tisingle bondTa alloys immersed in molten Cu as a model system. We develop a model of LMD kinetics based on a quantitative characterization of the effects of key parameters in our system including alloy composition, dealloying duration, and dealloying temperature. Further, this work demonstrates that the dealloying interface is at or near equilibrium during LMD, and that the rate-limiting step is the liquid-state diffusion of dissolving atoms away from the dealloying interface (diffusion-limited kinetics). The quantitative comparison between theoretically predicted and measured dealloying rates further reveals that convective transport and rejection of the dissolving element during coarsening of the structure also influence the dealloying kinetics.

View Accepted Manuscript (DOE)

Research Organization:: Northeastern Univ., Boston, MA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)

Grant/Contract Number:: FG02-07ER46400

OSTI ID:: 1906131

Journal Information:: Acta Materialia, Journal Name: Acta Materialia Vol. 115; ISSN 1359-6454

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Dealloying-based interpenetrating-phase nanocomposites matching the elastic behavior of human bone Okulov, I. V.; Weissmüller, J.; Markmann, J. Scientific Reports, Vol. 7, Issue 1 https://doi.org/10.1038/s41598-017-00048-4	journal	February 2017
Self-organization of helium precipitates into elongated channels within metal nanolayers Chen, Di; Li, Nan; Yuryev, Dina Science Advances, Vol. 3, Issue 11 https://doi.org/10.1126/sciadv.aao2710	journal	November 2017

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