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A phase-field model for describing three-phase electrode microstructure (i.e., electrode-phase, electrolyte-phase, and pore-phase) in solid oxide fuel cells is proposed using the diffuse-interface theory. Conserved composition and non-conserved grain orientation order parameters are simultaneously used to describe the coupled phase coarsening and grain growth in the three-phase electrode. The microstructural evolution simulated by the phase-field approach demonstrates the significant dependence of morphological microstructure and output statistic material features on the prescribed kinetic parameters and three-phase volume fractions. The triple-phase boundary fraction is found to have a major degradation in the early evolution.
Published in:
Applied Physics Letters
(Volume:101
,
Issue:
3
)
Date of Publication: Jul 2012
- Page(s):
- 033909 - 033909-5
- ISSN :
- 0003-6951
- Digital Object Identifier :
- 10.1063/1.4738230
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 23 July 2012
- Issue Date :
- Jul 2012
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