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

ISSN Imprimir: 1093-3611
ISSN On-line: 1940-4360

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

DOI: 10.1615/HighTempMatProc.v8.i3.40
pages 381-395

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

P. Ctibor
Institute of Plasma Physics, Za Slovankou 3, 182 00, Praha 8, Czech Republic
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
ENSIL, ESTER Technopole, 87068 Limoges - 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

RESUMO

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.


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