Composite Coatings Elaborated by Plasma Spraying of Dry Coated Particles


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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-Al2O3, 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 ,m), 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 ,m), covered by a binary layer of α-Al2O3 and SiC are sprayed.



Edited by:

H. Balmori-Ramirez, J.G. Cabañas-Moreno, H.A. Calderon-Benavides, K. Ishizaki and A. Salinas-Rodriguez




R. Cuenca-Alvarez et al., "Composite Coatings Elaborated by Plasma Spraying of Dry Coated Particles ", Materials Science Forum, Vol. 560, pp. 67-72, 2007

Online since:

November 2007




[1] S. Sampath, J. Matejicek, C.C. Berndt, H. Herman, in: Thermal Spray: Practical Solutions for Engineering Problems, ed. C.C. Berndt (ASM International, USA 1996).

[2] P. Fauchais, A.C. Léger, M. Vardelle, A. Vardelle, in: Proc. Julian Szekely Memorial Symp. on Materials Processing, ed. H.Y. Shon, J.W. Evans, D. Apelian (TMS, USA, 1997).

[3] R. Cuenca-Alvarez, H. Ageorges, P. Fauchais, P. Fournier, A. Smith: Mater. Sci. Forum, Vol. 442, (2003), p.67.

[4] M. Vardelle, A. Vardelle, A.C. Leger, P. Fauchais: J. Thermal Spray Tech. Vol. 50 (1994), p.50.

[5] P. Denoirjean, A.A. Syed, R. Cuenca-Alvarez, A. Denoirjean, H. Ageorges, J.C. Labbe, P. Fauchais: Physical and Chemical News PCN, Vol. 20, (2004), p.21.

[6] T. Yokoyama, K. Urayama, M. Naito, M. Kato, KONA 5 (1987), p.59.

[7] R. Cuenca-Alvarez, H. Ageorges, P. Fauchais: Mater. Sci. Forum, Vol. 442, (2003), p.73.

[8] L. Bianchi: Univ. of Limoges, France Ph. Dissertation, (1995).

[9] R. Cuenca-Alvarez, H. Ageorges, P. Fauchais, in: Thermal Spray: Advancing the Science and Applying the Technology, ed. C. Moreau and B. Maple (ASM International, USA 2003).

[10] R. Cuenca-Alvarez: Univ. of Limoges, France Ph. Dissertation, (2003).

[11] K. Volenik, V. Novak, J. Dubsky, P. Chraska, K. Neufuss, in: Thermal Spray: Meeting the Challenges of the 21th Century, ed. C. Coddet (ASM International, USA 1998).