Abstract
Tungsten carbide (WC-Co) coatings are extensively utilized in tribological environments. WC-12%Co coatings had been produced by utilizing an air plasma spraying system. The coatings were produced at different spraying distances, which affected the microstructure and the formation of different metallurgical phases of the coating. The six coating systems produced at 80- to 130-mm standoff distances were then characterized using scanning electron microscopy, X-ray diffraction (XRD), and a tribometer for wear rate and coefficient of friction (COF). The properties of the coatings were correlated with the microstructure, formation of different phases, and residual stresses of the coating. It was observed that the spraying distance from 100 to 110 mm resulted in optimum wear properties.
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