Effect of nanostructuring and Al alloying on friction and wear behaviour of thermal sprayed WC-Co coatings

► Nanostructured WC-Co coatings were deposited through HVOF process. ► Presently investigated nanostructured WC-Co coatings are free from brittle W2C like phases. ► Wear resistance of nanostructured coatings is better than micron sized coatings. ► Small amount Al addition in the coatings exhibit better wear resistance. ► Al helps to prevent decarburization as well as increase cohesion in the coatings.