期刊
SURFACE & COATINGS TECHNOLOGY
卷 205, 期 21-22, 页码 5218-5227出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.surfcoat.2011.05.028
关键词
Solid oxide fuel cell; Plasma spraying; Suspension; Graded electrolyte; Zeta potential; Rheometry
资金
- Natural Sciences and Engineering Research Council of Canada
- Northwest Mettech Corporation
- BC Innovation Council
Suspension plasma spraying (SPS) is an emerging technology that can rapidly produce thin, low porosity ceramic layers with no requirement for post deposition heat treatments. However. SPS requires a careful examination of the stability and dispersion of the feedstock suspensions in order to produce high quality coatings. The present study focuses on characterizing the rheology, zeta potential (ZP), particle size, and pH of yttria stabilized zirconia (YSZ), samaria doped ceria (SDC), and mixtures of YSZ and SDC ceramic powders in aqueous suspensions. Three potential dispersant materials were evaluated and optimum suspension formulations with excellent particle dispersion were designed based on rheological and electrostatic stability measurements. These optimized suspensions could be used as feedstock for SPS YSZ or SDC solid oxide fuel cell (SOFC) electrolyte layers or for compositionally graded YSZ/SDC layers. (C) 2011 Elsevier B.V. All rights reserved.
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