Non-uniform solute segregation at semi-coherent metal/oxide interfaces
Abstract
The properties and performance of metal/oxide nanocomposites are governed by the structure and chemistry of the metal/oxide interfaces. Here we report an integrated theoretical and experimental study examining the role of interfacial structure, particularly misfit dislocations, on solute segregation at a metal/oxide interface. We find that the local oxygen environment, which varies significantly between the misfit dislocations and the coherent terraces, dictates the segregation tendency of solutes to the interface. Depending on the nature of the solute and local oxygen content, segregation to misfit dislocations can change from attraction to repulsion, revealing the complex interplay between chemistry and structure at metal/oxide interfaces. These findings indicate that the solute chemistry at misfit dislocations is controlled by the dislocation density and oxygen content. As a result, fundamental thermodynamic concepts – the Hume-Rothery rules and the Ellingham diagram – qualitatively predict the segregation behavior of solutes to such interfaces, providing design rules for novel interfacial chemistries.
- Authors:
-
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Univ. of Idaho, Moscow, ID (United States)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States); National Renewable Energy Lab. (NREL), Golden, CO (United States)
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Univ. of Michigan, Ann Arbor, MI (United States)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Publication Date:
- Research Org.:
- Energy Frontier Research Centers (EFRC) (United States). Center for Materials at Irradiation and Mechanical Extremes (CMIME); Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1236769
- Report Number(s):
- LA-UR-15-25964
Journal ID: ISSN 2045-2322; srep13086
- Grant/Contract Number:
- AC52-06NA25396
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Scientific Reports
- Additional Journal Information:
- Journal Volume: 5; Journal ID: ISSN 2045-2322
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; composites; electronic structure; surfaces, interfaces and thin films
Citation Formats
Choudhury, Samrat, Aguiar, Jeffery A., Fluss, Michael J., Hsiung, Luke L., Misra, Amit, and Uberuaga, Blas P. Non-uniform solute segregation at semi-coherent metal/oxide interfaces. United States: N. p., 2015.
Web. doi:10.1038/srep13086.
Choudhury, Samrat, Aguiar, Jeffery A., Fluss, Michael J., Hsiung, Luke L., Misra, Amit, & Uberuaga, Blas P. Non-uniform solute segregation at semi-coherent metal/oxide interfaces. United States. https://doi.org/10.1038/srep13086
Choudhury, Samrat, Aguiar, Jeffery A., Fluss, Michael J., Hsiung, Luke L., Misra, Amit, and Uberuaga, Blas P. Wed .
"Non-uniform solute segregation at semi-coherent metal/oxide interfaces". United States. https://doi.org/10.1038/srep13086. https://www.osti.gov/servlets/purl/1236769.
@article{osti_1236769,
title = {Non-uniform solute segregation at semi-coherent metal/oxide interfaces},
author = {Choudhury, Samrat and Aguiar, Jeffery A. and Fluss, Michael J. and Hsiung, Luke L. and Misra, Amit and Uberuaga, Blas P.},
abstractNote = {The properties and performance of metal/oxide nanocomposites are governed by the structure and chemistry of the metal/oxide interfaces. Here we report an integrated theoretical and experimental study examining the role of interfacial structure, particularly misfit dislocations, on solute segregation at a metal/oxide interface. We find that the local oxygen environment, which varies significantly between the misfit dislocations and the coherent terraces, dictates the segregation tendency of solutes to the interface. Depending on the nature of the solute and local oxygen content, segregation to misfit dislocations can change from attraction to repulsion, revealing the complex interplay between chemistry and structure at metal/oxide interfaces. These findings indicate that the solute chemistry at misfit dislocations is controlled by the dislocation density and oxygen content. As a result, fundamental thermodynamic concepts – the Hume-Rothery rules and the Ellingham diagram – qualitatively predict the segregation behavior of solutes to such interfaces, providing design rules for novel interfacial chemistries.},
doi = {10.1038/srep13086},
journal = {Scientific Reports},
number = ,
volume = 5,
place = {United States},
year = {Wed Aug 26 00:00:00 EDT 2015},
month = {Wed Aug 26 00:00:00 EDT 2015}
}
Web of Science
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