Pham, S. orcid.org/0000-0002-7347-4317, Tieu, A.K., Sun, C. et al. (2 more authors) (2024) Direct Visualization of Chemical Transport in Solid-State Chemical Reactions by Time-of-Flight Secondary Ion Mass Spectrometry. Nano Letters, 24 (12). pp. 3702-3709. ISSN 1530-6984
Abstract
Systematic control and design of solid-state chemical reactions are required for modifying materials properties and in novel synthesis. Understanding chemical dynamics at the nanoscale is therefore essential to revealing the key reactive pathways. Herein, we combine focused ion beam–scanning electron microscopy (FIB-SEM) and time-of-flight secondary ion mass spectrometry (TOF-SIMS) to track the migration of sodium from a borate coating to the oxide scale during in situ hot corrosion testing. We map the changing distribution of chemical elements and compounds from 50 to 850 °C to reveal how sodium diffusion induces corrosion. The results are validated by in situ X-ray diffraction and post-mortem TOF-SIMS. We additionally retrieve the through-solid sodium diffusion rate by fitting measurements to a Fickian diffusion model. This study presents a step change in analyzing microscopic diffusion mechanics with high chemical sensitivity and selectivity, a widespread analytical challenge that underpins the defining rates and mechanisms of solid-state reactions.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2024 The Authors. Published by American Chemical Society. This is an open access article under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits unrestricted use, distribution and reproduction in any medium, provided the original work is properly cited. |
Keywords: | in situ heating; TOF-SIMS; ceramic coatings; hot corrosion; sodium diffusion |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemical & Process Engineering (Leeds) |
Funding Information: | Funder Grant number EPSRC (Engineering and Physical Sciences Research Council) EP/V028855/1 EPSRC (Engineering and Physical Sciences Research Council) EP/V044907/1 EU - European Union EP/Y024583/1 |
Depositing User: | Symplectic Publications |
Date Deposited: | 14 Mar 2024 15:59 |
Last Modified: | 23 Jan 2025 11:29 |
Published Version: | https://pubs.acs.org/doi/10.1021/acs.nanolett.4c00... |
Status: | Published |
Publisher: | American Chemical Society |
Identification Number: | 10.1021/acs.nanolett.4c00021 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:210260 |