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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

2004, Volume8

158 pages

DOI: 10.1615/HighTempMatProc.v8.i3

Issue price - $144.00

EFFECT OF THE IN-FLIGHT BEHAVIOR OF PARTICLES ON THE AMORPHOUS CONTENT OF METALLIC COATINGS UNDER THERMAL SPRAY CONDITIONS

P. Ctibor
University of Limoges, SPCTS, 123 Avenue Albert Thomas, 87060 Limoges Cedex, France

S. Nourouzi
Laboratoire Sciences des Precedes Ceramiques et Traitements de Surface ENSIL, 16 rue d'Atlantis, 87068 Limoges, France

C. Le Niniven
Laboratoire Sciences des Precedes Ceramiques et Traitements de Surface ENSIL, 16 rue d'Atlantis, 87068 Limoges, France

Armelle Vardelle
University of Limoges, Laboratoire Sciences des Procédés Céramiques et de Traitements de Surface, ENSIL,16 rue d'Atlantis, 87068 LIMOGES Cedex, France

P. Rohan
National Research Council Canada, Industrial Materials Institute, 75 Boulevard de Mortagne, Boucherville, Quebec, Canada, J4B 6Y4

S. Bouaricha
National Research Council Canada, Industrial Materials Institute, 75 Boulevard de Mortagne, Boucherville, Quebec, Canada, J4B 6Y4

J.-G. Legoux
National Research Council Canada, Industrial Materials Institute, 75 Boulevard de Mortagne, Boucherville, Quebec, Canada, J4B 6Y4

C. Moreau
National Research Council Canada, Industrial Materials Institute, 75 Boulevard de Mortagne, Boucherville, Quebec, Canada, J4B 6Y4

ABSTRACT

Amorphous metal alloys in the form of bulk materials or coatings exhibit generally high mechanical properties and high wear and corrosion resistance. Therefore, they have generated significant interest over the last three decades. Thermal spray processes that are characterized by rather high cooling rates (≈ 10⁶ K/s) could be a possible route for the manufacturing of thick coatings (up to 1-2 mm) of glassy metal alloys and the first commercial product was developed in 1984. However, most of the “amorphous” thermal-spray coatings have a significant content of crystalline phase. The objective of this study is to investigate the relationship between the characteristics of particles (i.e. temperature, velocity and size) at impact and the degree of amorphisation of the as-sprayed coatings. Two thermal spray techniques (i.e. plasma and wire-arc) are used in order to get a large range of particle parameters and different heating histories before impact on the substrate.