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High Temperature Material Processes (An International Quarterly of High-Technology Plasma Processes)

An International Journal

ISSN for PRINT: 1093-3611

Institutional price:	$604.00
Issues per year:	4

Best Paper Award Selection - Editorial Board Site

2005, Volume9

155 pages

DOI: 10.1615/HighTempMatProc.v9.i2

Issue price - $144.00

INFLUENCE OF SPRAY TECHNOLOGY ON IONIC CONDUCTIVITY OF YTTRIA STABILIZED ZIRCONIA

G. Renouard-Vallet
CEA le Ripault, Monts, France

L. Bianchi
Commissariat a L'Energie Atomique, Le Ripault, B.P. 16, 37260 MONTS, FRANCE

Pierre Fauchais
Laboratoire Sciences des Precedes Ceramiques et de Traitements de Surface, UMR 6638 CNRS-Universite de Limoges, faculte des Sciences et Technique, conventionne avec le CEA n° M08, France

Michel Vardelle
Laboratory Science of Ceramic and Surface Treatment Processes (SPCTS) XJMR-CNRS 6638 Faculty of Sciences - Univ. of Limoges 123 A. Albert Thomas 87060 Limoges Cedex, France

Maher I. Boulos
Department of Chemical Engineering University of Sherbrooke, 2500 Blvd. de lUniversite Sherbrooke J1К 2R1, PQ - Canada

F. Gitzhofer
RTP, Universite de Sherbrooke, Sherbrooke (Qc), Canada J1K 2R1

ABSTRACT

In this paper the influence of plasma spray parameters of both Vacuum Plasma Spraying (VPS) and Air Plasma Spraying (APS) processes onto Yttria Stabilized Zirconia (YSZ) coating microstructures were studied in order to establish a correlation with the ionic conductivity.
Investigations of the relationships between spraying conditions and the spreading of particles were carried out thanks to a study of in-flight particle properties.
The in-flight properties were determined using the DPV 2000 and the lamellae were studied by optical microscopy and 3D analyzes. Coatings were then elaborated.
Coating microstructures were evaluated by Scanning Electron Microscopy (SEM) and their electrical properties by Impedance Spectroscopy (IS) in order to establish a relationship between interlamellar contacts and ionic conductivity. It has been shown that with these results, it has been possible to increase the ionic conductivity of YSZ coatings by improving their interlamellar contacts.