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High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes
SJR: 0.137 SNIP: 0.341 CiteScore™: 0.43

ISSN Imprimer: 1093-3611
ISSN En ligne: 1940-4360

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

DOI: 10.1615/HighTempMatProc.v8.i2.100
pages 253-272

INVESTIGATION OF PHENOMENA INFLUENCING PROPERTIES OF PLASMA SPRAYED CERAMIC-METAL COMPOSITE DEPOSITS

A. A. Syed
SPCTS, Universite de Limoges, Faculte des Sciences, Limoges, France
Alain Denoirjean
Equipe Plasma Laser Matériaux, ESA CNRS 6015, 87060 Limoges Cedex, France
P. Denoirjean
SPCTS, Universite de Limoges, Faculte des Sciences,123 ave. A. Thomas, 87060, Limoges, France
J. C. Labbe
Faculte des Sciences et Techniques, L.M.C.T.S. - C.N.R.S. E.S.A. 6015 Universite de Limoges -123, av. Albert Thomas - 87065 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

RÉSUMÉ

The phenomena influencing the properties of plasma sprayed ceramic-metal composite (cermet) deposits were examined. For that purpose, cermet deposits were developed by co-spraying alumina and austenitic stainless steel powders and were compared with those fabricated by spraying these powders individually. A set of particle injection and plasma spray parameters were determined by optimizing deposition efficiency of sprayed powders. The properties of the fabricated composite deposits were only partially dependent on the inherent properties of the parent materials and other factors had more dominating influence. Beside other factors, in-flight metallic particle oxidation and ceramic-metal wetting behavior were found to be the major phenomena controlling deposit properties. The in-flight particle oxidation, contributing up to 43% of the total oxide in metallic deposits, resulted in higher hardness and elastic modulus values of stainless steel deposits. The formed oxide could assist in improving the wetting behavior of stainless steel-alumina system, studied by sessile drop method. In non-wetting conditions, extensively fragmented stainless steel splats were collected on predeposited alumina causing poor interlamellar contacts and inferior deposit integrity and mechanical properties.


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