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Topology-generating interfacial pattern formation during liquid metal dealloying

Journal Article · · Nature Communications
DOI:https://doi.org/10.1038/ncomms9887· OSTI ID:1239972
 [1];  [2];  [2];  [2];  [3]
  1. Northeastern Univ., Boston, MA (United States); Northeastern University, Boston, MA USA
  2. Johns Hopkins Univ., Baltimore, MD (United States)
  3. Northeastern Univ., Boston, MA (United States)

Liquid metal dealloying has emerged as a novel technique to produce topologically complex nanoporous and nanocomposite structures with ultra-high interfacial area and other unique properties relevant for diverse material applications. This process is empirically known to require the selective dissolution of one element of a multicomponent solid alloy into a liquid metal to obtain desirable structures. However, how structures form is not known. Here we demonstrate, using mesoscale phase-field modelling and experiments, that nano/microstructural pattern formation during dealloying results from the interplay of (i) interfacial spinodal decomposition, forming compositional domain structures enriched in the immiscible element, and (ii) diffusion-coupled growth of the enriched solid phase and the liquid phase into the alloy. We highlight how those two basic mechanisms interact to yield a rich variety of topologically disconnected and connected structures. Furthermore, we deduce scaling laws governing microstructural length scales and dealloying kinetics.

Research Organization:
Northeastern Univ., Boston, MA (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
FG02-07ER46400
OSTI ID:
1239972
Alternate ID(s):
OSTI ID: 1906126
Journal Information:
Nature Communications, Journal Name: Nature Communications Vol. 6; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (16)

Hierarchical nanoporous metals as a path toward the ultimate three-dimensional functionality journal October 2017
Self-organization of helium precipitates into elongated channels within metal nanolayers journal November 2017
Solid State Porous Metal Production: A Review of the Capabilities, Characteristics, and Challenges journal January 2018
Beating Thermal Coarsening in Nanoporous Materials via High‐Entropy Design journal December 2019
A Trimodal Porous Cobalt‐Based Electrocatalyst for Enhanced Oxygen Evolution journal July 2019
Challenges to model the role of heterogeneities on the shock response and spall failure of metallic materials at the mesoscales journal December 2019
Nanoporous magnesium journal August 2018
Dealloying-based interpenetrating-phase nanocomposites matching the elastic behavior of human bone journal February 2017
Bi-continuous pattern formation in thin films via solid-state interfacial dealloying studied by multimodal characterization journal January 2019
Small-angle X-ray scattering of nanoporous materials journal January 2020
Local heterogeneity in the mechanical properties of bicontinuous composites made by liquid metal dealloying journal December 2016
Microstructural patterns with tunable mechanical anisotropy obtained by simulating anisotropic spinodal decomposition
  • Vidyasagar, A.; Krödel, S.; Kochmann, D. M.
  • Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 474, Issue 2218 https://doi.org/10.1098/rspa.2018.0535
journal October 2018
Phase-field investigation of the coarsening of porous structures by surface diffusion journal August 2019
Evolution of a bicontinuous structure in peritectic melting: The simplest form of dealloying journal November 2019
Dealloying-based interpenetrating-phase nanocomposites matching the elastic behavior of human bone text January 2017
Pattern formation during electrochemical and liquid metal dealloying journal January 2018

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