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High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes
ESCI SJR: 0.176 SNIP: 0.48 CiteScore™: 1.3

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

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

DOI: 10.1615/HighTempMatProc.v2.i3.30
pages 327-337

RESIDUAL STRESSES AND MICROSTRUCTURE OF PLASMA SPRAYED ZIRCONIA COATINGS

A. Haddadi
Laboratoire de Materiaux Ceramiques et Traitements de Surface - ESA CNRS 6015 Universite de Limoges - 123, Avenue Albert Thomas 87060 Limoges Cedex - France
R. Hamacha
Laboratoire de Chimie des Materiaux - Universite d'Oran Es-senia B.P. 1524 El- M'naouer - Oran 31000 Algerie
Alain Grimaud
L.E.T.P., Faculté des Sciences, 2 Bd Lavoisier 49045 Angers 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
F. Nardou
Laboratoire de Materiaux Ceramiques et Traitements de Surface - ESA CNRS 6015 Universite de Limoges - 123, Avenue Albert Thomas 87060 Limoges Cedex - France

ABSTRAKT

Coatings of partially stabilized zirconia with 8 wt % yttria (YPSZ) were plasma sprayed on button type substrates placed on a rotating cylindrical sample holder with given spraying conditions. By varing the sample holder rotation and the torch translation speeds, the pass thickness, the coating mean temperature and hardness varied. Any decrease of the translation and rotation speeds increased the substrate and coating mean temperature, the pass thickness and in certain cases resulted in coatings with a columnar microstructure through almost the whole coating and a much better cohesion. In this case, the stress level, determined by X-rays, was higher.


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