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High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes
SJR: 0.19 SNIP: 0.341 CiteScore™: 0.43

ISSN Print: 1093-3611
ISSN Online: 1940-4360

High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes

DOI: 10.1615/HighTempMatProc.v8.i3.50
pages 397-406

INFLUENCE OF POWDER SIZE DISTRIBUTIONS ON MICROSTRUCTURAL FEATURES OF FINELY STRUCTURED PLASMA SPRAYED COATINGS

C. Delbos
Laboratoire Sciences des Precedes Ceramiques et de Traitements de Surface, UMR 6638 CNRS-Universite de Limoges, conventionne avec le CEA n° M08
V. Rat
PCTS -CNRS UMR 6638, University of Limoges, 123 av. A. Thomas, 87060 Limoges cedex, France
C. Bonhomme
Laboratoire Sciences des Precedes Ceramiques et de Traitements de Surface, UMR 6638 CNRS-Universite de Limoges, conventionne avec le CEA n° M08
J. Fazilleau
Laboratoire Sciences des Precedes Ceramiques et de Traitements de Surface, UMR 6638 CNRS-Universite de Limoges, conventionne avec le CEA n° M08
J. F. Coudert
Laboratoire Sciences des Procédés Céramiques et Traitements de Surface, UMR-CNRS 6638, Université de Limoges, 87060 Limoges Cedex, France
Pierre Fauchais
Laboratoire Sciences des Procedes Ceramiques et de Traitements de Surface UMR CNRS 6638 University of Limoges 123 avenue Albert Thomas, 87060 LIMOGES - France

ABSTRACT

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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