Liquid plasma sprayed coatings of yttria-stabilized zirconia for SOFC electrolytes |
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Authors: | R Rampon F L Toma G Bertrand C Coddet |
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Affiliation: | (1) LERMPS-UTBM, Site de Sévenans, 90010 Belfort, France |
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Abstract: | To achieve solid oxide fuel cells (SOFC) at reduced costs, the atmospheric plasma spray (APS) process could be an attractive
technique. However, to make dense and thin layers as needed for electrolytes, a suspension is preferably implemented as a
feedstock material instead of a conventional powder. Suspensions of yttria-stabilized zirconia particles in methanol have
been prepared with various solid loadings and states of dispersion. An external injection system was used to ensure the atomization
and radial injection of the suspension into the Ar-H2 plasma under atmospheric conditions. The coatings morphologies were characterized by scanning electron microscopy, and their
porosity was evaluated by the Archimedes method. Differences in the microstructure of the deposits were observed depending
on the APS operating conditions. Special attention has been dedicated to assess the influence of the suspension as well as
the injection on the layer morphology. For this purpose, the atomization has been investigated and efforts have been made
to understand relationships among suspension properties, atomization, and coating microstructure.
This article was originally published inBuilding on 100 Years of Success, Proceedings of the 2006 International Thermal Spray Conference (Seattle, WA), May 15–18, 2006, B.R. Marple, M.M. Hyland, Y.-Ch. Lau, R.S. Lima, and J. Voyer, Ed., ASM International, Materials
Park, OH, 2006. |
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Keywords: | liquid plasma spray solid oxide fuel cell yttria-stabilized zirconia |
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