TY - GEN
T1 - Composite coatings elaborated by plasma spraying of dry coated particles
AU - Cuenca-Alvarez, R.
AU - Ageorges, H.
AU - Fauchais, P.
PY - 2007
Y1 - 2007
N2 - The influence of dry particle coating on the properties of coatings produced by d.c. arc plasma spraying is reported. A mechanofusion process is used to coat coarser metallic particles with fine ceramic particles without using either binders or solvents. The key parameters affecting the mechanofusion process and the corresponding plasma spraying method have been varied in order to increase the hardness of the resulting composite coatings. Efforts have been made to disperse homogeneously hard particles (α-Al2O 3, SiC) into a metallic matrix (316L stainless steel) and check if it is possible to limit the oxidation of metallic particles during their flight in the plasma jet flowing in air. The hardness of resulting composite coatings depends on the metallic particle size even when the hard ceramic particles are homogenously dispersed into the metallic matrix. Spraying mechanofused powder composed of finer stainless steel particles (64 μm), results in finer structured deposits that show a higher oxide content. On the contrary, a low oxidation rate of the metallic matrix is observed when coarser metallic particles (120 μm), covered by a binary layer of α-Al2O3 and SiC are sprayed.
AB - The influence of dry particle coating on the properties of coatings produced by d.c. arc plasma spraying is reported. A mechanofusion process is used to coat coarser metallic particles with fine ceramic particles without using either binders or solvents. The key parameters affecting the mechanofusion process and the corresponding plasma spraying method have been varied in order to increase the hardness of the resulting composite coatings. Efforts have been made to disperse homogeneously hard particles (α-Al2O 3, SiC) into a metallic matrix (316L stainless steel) and check if it is possible to limit the oxidation of metallic particles during their flight in the plasma jet flowing in air. The hardness of resulting composite coatings depends on the metallic particle size even when the hard ceramic particles are homogenously dispersed into the metallic matrix. Spraying mechanofused powder composed of finer stainless steel particles (64 μm), results in finer structured deposits that show a higher oxide content. On the contrary, a low oxidation rate of the metallic matrix is observed when coarser metallic particles (120 μm), covered by a binary layer of α-Al2O3 and SiC are sprayed.
KW - Agglomeration
KW - Dry particle coating
KW - Mechanofusion process (MF)
UR - http://www.scopus.com/inward/record.url?scp=38349172141&partnerID=8YFLogxK
U2 - 10.4028/0-87849-446-4.67
DO - 10.4028/0-87849-446-4.67
M3 - Contribución a la conferencia
SN - 0878494464
SN - 9780878494460
T3 - Materials Science Forum
SP - 67
EP - 72
BT - Advanced Structural Materials III - Advanced Structural Materials Symposium of the Annual Congress of the Mexican Academy of Materials Science
PB - Trans Tech Publications Ltd
T2 - Advanced Structural Materials Symposium of the Annual Congress of the Mexican Academy of Materials Science
Y2 - 20 August 2006 through 24 August 2006
ER -