Microstructural and analytical study of thermally sprayed WC-Co coatings in connection with their wear resistance

The microstructure of High Velocity Oxy-Fuel (HVOF) thermally sprayed WC-Co coatings was quantitatively evaluated in an attempt to describe the transformations that take place during thermal spraying. Slurry erosion tests were performed to measure the weight loss as a function of flow velocity and incident angle. It was found that an optimum amount of transformation is required to ensure a maximum of erosion resistance.