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| Abstract No.: |
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Scheduled at:
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Thursday, September 29, 2011, Saal A 11:55 AM
Young Professionals
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| Title: |
Deposition of nickel-yttria stabilized zirconia and nickel-samaria doped ceria anodes by solution precursor plasma spraying for solid oxide fuel cells
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| Authors: |
Craig Metcalfe* / University of Toronto, Canada
Elisa Lay / University of Toronto, Canada
Olivera Kesler/ University of Toronto, Canada
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| Abstract: |
The Solution Precursor Plasma Spray (SPPS) process is utilized to deposit both nickel-Yttria Stabilized Zirconia (YSZ) and nickel-Samaria Doped Ceria (SDC) coatings using an Axial III Plasma Spray Torch (Northwest Mettech Corp.). These coatings are investigated for use as anodes in Solid Oxide Fuel Cells (SOFCs). The solutions are prepared by dissolving the appropriate proportions of salts in water to obtain target compositions of 40 vol% Ni and 60 vol% of either YSZ or SDC for the resulting coatings. The coating microstructures are evaluated using Scanning Electron Microscopy (SEM) and Energy Dispersive x-ray Spectroscopy (EDS) and are correlated to the corresponding precursor droplet size distribution and in-flight particle characteristics. The precursor droplet size distributions are evaluated by laser Doppler measurement and the in-flight particle characteristics are obtained by quenching particles from the plasma using a high pressure water jet. The in-flight particle size distributions and phases are obtained using laser light scattering and x-ray diffraction, respectively, on the particles collected using the water jet. The influence of plasma conditions, standoff distance, and solution concentration on the deposition efficiency and coating microstructure is evaluated.
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