The Effect Particle Velocity on the Thickness of Thermally Sprayed Coatings

Authors: M. Jalali Azizpour, H. Mohammadi Majd

Abstract:

In this paper, the effect of WC-12Co particle velocity in HVOF thermal spraying process on the coating thickness has been studied. The statistical results show that the spray distance and oxygen-to-fuel ratio are more effective factors on particle characterization and thickness of HVOF thermal spraying coatings. Spray Watch diagnostic system, scanning electron microscopy (SEM), X-ray diffraction and thickness measuring system were used for this purpose.

Keywords: Grinding, HVOF, Thermal spray, WC-Co.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1091250

References:

[1] M. HeydarzadehSohi, F.Ghadami, Comparative Tribological Study of Air Plasma Sprayed WC–12%Co Coating versus Conventional Hard Chromium Electrodeposit, Tribology International, 2009.
[2] Y.Y. Santana, Characterization and Residual Stresses of WC–Co Thermally Sprayed Coatings, Surface & Coatings Technology 202 (2008) 4560–4565
[3] C. Lyphout, Residual Stresses Distribution through Thick HVOF Sprayed Inconel 718 Coatings, Journal of Thermal Spray Technology, Volume 17(5-6)Mid-December 2008—915.
[4] Stewart DA, Shipway PH, McCartney DG.Microstructural Evolution in Thermally Sprayed WC–Co CoatingsActa Mater 2000;48:1593–604.
[5] Yang Q, Senda T, Ohmori A. Effect of carbide grain size on Microstructure and Sliding Wear Behavior of HVOF-sprayed WC–12% Co Coatings. Wear 2003;254:23–34.
[6] T.C. Totemeier, Residual Stress Determination in Thermally Sprayed Coatings—A Comparison of Curvature Models and X-Ray Techniques, Surface & Coatings Technology 200 (2006) 3955 – 3962.
[7] M.JalaliAzizpour, S.Nourouzi, The Effect ofSpray Parameters on the WC-12Co Particles Velocity, Iranian Journal of surface science, vol16(45-53)2013.