Deposition of NiO/YSZ composite and YSZ by suspension plasma spray on porous metal

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TypeArticle
ConferenceITSC2010: International Thermal Spray Conference and Exposition 2010, 2010-05-03, Singapore
AbstractThe use of a liquid feedstock carrier in suspension plasma spray (SPS) permits injection of fine powders, providing the possibility of producing sprayed coatings that are both thin and dense and have fine microstructures. These characteristics make SPS an attractive process for depositing highly efficient electrodes and electrolytes for solid oxide fuel cell (SOFC) applications. In the present study, NiO-yttria stabilized zirconia (YSZ) anode and YSZ electrolyte half cells were successfully deposited on porous Hastelloy X substrates by SPS. The NiO-YSZ anode deposition process was optimized by design of experiment. The YSZ electrolyte spray process was examined by changing one parameter at a time. The results from the design-of-experiment trials indicate that the porosity of the as-deposited coatings increased with an increase of suspension feed rate while it decreased with an increase of total plasma gas flow rate and standoff distance. The deposition efficiency increased with an increase of total plasma gas flow rate, suspension feed rate and standoff distance. The microstructure examination by SEM shows that the NiO and YSZ phases were homogeneously distributed and that the YSZ phase had a lamellar structure. It was observed that the density of the YSZ electrolyte layer increased as input power of the plasma torch increased.
Publication date
LanguageEnglish
AffiliationNRC Industrial Materials Institute; National Research Council Canada; NRC Institute for Fuel Cell Innovation
Peer reviewedNo
NRC number52430
NPARC number16885340
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Record identifier3c2add84-8627-413e-8890-1ee1d36e0d72
Record created2011-02-17
Record modified2016-05-09
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