Journal article
Coarsening kinetics of alloy-doped nanoporous metals
Scripta materialia, v 255, 116373
15 Jan 2025
Abstract
Due to their high surface-to-volume ratios, nanoporous metals are being explored for a range of catalytic and structural applications. However, these materials have thermodynamically unstable morphologies and degrade via coarsening at elevated temperatures. One potential mitigation strategy is to introduce atomic species that inhibit diffusional transport, but there is limited mechanistic understanding. To begin addressing this knowledge gap, the impact of a slow-diffusing dopant on the coarsening behavior of a nanoporous metal is studied using kinetic Monte Carlo simulations. The simulations were analyzed using reaction models and isoconversional analyses to extract constitutive coarsening laws, which confirm a coarsening exponent associated with classical surface diffusion. In addition, a rate equation is derived for the role of alloying dopants. It is found that only a few atomic percent is needed to stymie coarsening over experimentally relevant timescales, which has broad implications for the future design and tailoring of these materials.
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Details
- Title
- Coarsening kinetics of alloy-doped nanoporous metals
- Creators
- Luis Granadillo - Department of Material Science and Engineering, Northwestern University, Evanston, IL 60208, USAJoshua Snyder - Department of Chemical and Biological Engineering, Drexel University, Philadelphia, PA 19104, USAZhiyong Xia - Johns Hopkins University Applied Physics LaboratoryIan McCue - Department of Material Science and Engineering, Northwestern University, Evanston, IL 60208, USA
- Publication Details
- Scripta materialia, v 255, 116373
- Publisher
- Elsevier; OXFORD
- Number of pages
- 7
- Grant note
- NSF DMR program: 1904571, 1904578 Air Force Office of Scientific Research: FA9550-22-1-0221
This material is based upon work supported the NSF DMR program under Grants #1904571 and #1904578, and the Air Force Office of Scientific Research under award number FA9550-22-1-0221.
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Chemical and Biological Engineering
- Web of Science ID
- WOS:001324631600001
- Scopus ID
- 2-s2.0-85204600592
- Other Identifier
- 991021905012004721
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Materials Science, Multidisciplinary
- Metallurgy & Metallurgical Engineering
- Nanoscience & Nanotechnology