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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 Печать: 1093-3611
ISSN Онлайн: 1940-4360

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

DOI: 10.1615/HighTempMatProc.v15.i1.70
pages 51-60

INFLUENCE OF PREHEATING PARAMETERS ON THE PLASMA-JET OXIDATION OF A LOW-CARBON STEEL

J. Pech
Université de Rouen, LASTSM, IUT, 76821 Mont Saint Aignan Cedex, France
B. Hannoyer
Université de Rouen, LASTSM, IUT, 76821 Mont Saint Aignan Cedex, France
O. Lagnoux
Equipe Plasma Laser Matériaux, ESA CNRS 6015, 87060 Limoges Cedex, France
Alain Denoirjean
Equipe Plasma Laser Matériaux, ESA CNRS 6015, 87060 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

Краткое описание

The adhesion/cohesion (A/C) of coatings onto metallic substrates is an important property for most service conditions. Preheating the substrate before spraying the powder is a way to improve its A/C. It results in a surface oxidation of the substrate due to the high temperature of the gas close to the substrate surface and consequently to the high level of atomic oxygen. This study is devoted to the estimation of the influence of this oxide layer onto the A/C values. A precise monitoring of the preheating process by presetting values of the heating rate, temperature level, and heating time allows producing oxide layers with controlled composition and thickness. In the studied case of low carbon steel a specific choice in the heating rate and temperature leads to the production of an oxide layer with a low or high content of hematite layers in a duplex layer of hematite and magnetite iron oxides.


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