MECHANICAL PROPERTIES OF HIGH VELOCITY OXY FUEL THERMAL SPRAYS COATING

The microstructure and mechanical properties of High Velocity Oxy-Fuel (HVOF) sprayed Cr3C2-NiCr alloy coatings deposited on austenitic stainless steel AISI 304 were investigated. The splat morphology of the coatings is due to the deposition and re-solidification of successive molten or semi molten powder particles. The morphologies of the coatings were characterized by using the techniques such as optical microscopy, X-ray diffraction () and field emission scanning electron XRDmicroscopy/energy-dispersive analysis. Average microhardness of the coatings at different loads were found to be in the range of 222.8–523 HV, respectively.