Publication de 4 numéros par an
ISSN Imprimer: 1093-3611
ISSN En ligne: 1940-4360
Indexed in
INFLUENCE OF POWDER SIZE DISTRIBUTIONS ON MICROSTRUCTURAL FEATURES OF FINELY STRUCTURED PLASMA SPRAYED COATINGS
RÉSUMÉ
This paper is devoted to the production of finely structured ceramic coatings by Suspension Plasma Spraying (SPS). It mainly consists in injecting in a Direct Current (D.C.) plasma jet a suspension containing submicronic ceramic particles. The presented work is aimed at producing yttria stabilized zirconia (YSZ) electrolytes of Solid Oxide Fuel Cells (SOFC). First, the effect of powder size distributions on the flattening of collected splats is studied. Second, the influence of these powder size distributions on the microstructural features of coatings is highlighted. It is shown that a narrow powder size distribution centred on about 1 μm should be used to produce coatings with a reduced porosity.
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Etchart-Salas R., Rat V., Coudert J. F., Fauchais P., Caron N., Wittman K., Alexandre S., Influence of Plasma Instabilities in Ceramic Suspension Plasma Spraying, Journal of Thermal Spray Technology, 16, 5-6, 2007. Crossref
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Tarasi F., Medraj M., Dolatabadi A., Oberste-Berghaus J., Moreau C., Effective Parameters in Axial Injection Suspension Plasma Spray Process of Alumina-Zirconia Ceramics, Journal of Thermal Spray Technology, 17, 5-6, 2008. Crossref
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Arevalo-Quintero O., Waldbillig D., Kesler O., An investigation of the dispersion of YSZ, SDC, and mixtures of YSZ/SDC powders in aqueous suspensions for application in suspension plasma spraying, Surface and Coatings Technology, 205, 21-22, 2011. Crossref