The deposition of porous (LSM) perovskite cathode materials by conventional plasma spray has been a challenge because of the decomposition of perovskite materials to their suboxides at high temperature. In this paper, the solution precursor plasma spraying (SPPS) process, in which solution precursors of the desired resultant materials are fed into a direct current plasma jet by atomizing gas, was used to simultaneously synthesize LSM perovskite and deposit porous cathode coatings. The experimental results show that process parameters have a significant effect on the fabricated coatings. The perovskite coatings consist of porous agglomerates of small particles with rounded features and local denser regions referred to as thick flakes. The small particles and thick flakes were held together by the previously molten material. There are two kinds of pores in the fabricated coatings: large pores located between the agglomerates and fine pores inside the agglomerates. The porous LSM cathode coatings have of desirable homogeneous pores determined by several processing parameters. X-ray diffraction of sintered coatings shows that no suboxides of perovskite appear. The results of this project indicate that the SPPS is a potential process to produce high quality cathodes for solid oxide fuel cell application.
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e-mail: youliang.wang@cnrc-nrc.gc.ca
e-mail: tom.coyle@utoronto.ca
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April 2011
This article was originally published in
Journal of Fuel Cell Science and Technology
Research Papers
Solution Precursor Plasma Spray of Porous Perovskite Coatings for SOFC Cathode Application
Y. Wang,
e-mail: youliang.wang@cnrc-nrc.gc.ca
Y. Wang
Industrial Materials Institute
, National Research Council Canada, 75, de Mortagne, Boucherville, QC, J4B 6Y4, Canada
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T. W. Coyle
T. W. Coyle
Department of Materials Science and Engineering, Centre for Advanced Coating Technologies,
e-mail: tom.coyle@utoronto.ca
University of Toronto
, 184 College Street, Toronto, ON, M5S 3E4, Canada
Search for other works by this author on:
Y. Wang
Industrial Materials Institute
, National Research Council Canada, 75, de Mortagne, Boucherville, QC, J4B 6Y4, Canadae-mail: youliang.wang@cnrc-nrc.gc.ca
T. W. Coyle
Department of Materials Science and Engineering, Centre for Advanced Coating Technologies,
University of Toronto
, 184 College Street, Toronto, ON, M5S 3E4, Canadae-mail: tom.coyle@utoronto.ca
J. Fuel Cell Sci. Technol. Apr 2011, 8(2): 021005 (5 pages)
Published Online: November 29, 2010
Article history
Received:
February 7, 2009
Revised:
January 6, 2010
Online:
November 29, 2010
Published:
November 29, 2010
Citation
Wang, Y., and Coyle, T. W. (November 29, 2010). "Solution Precursor Plasma Spray of Porous Perovskite Coatings for SOFC Cathode Application." ASME. J. Fuel Cell Sci. Technol. April 2011; 8(2): 021005. https://doi.org/10.1115/1.4002583
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