Post processing of the layer deposited by electric discharge coating

ABSTRACTElectric discharge coating is a deposition process that can deposit thin and thick films using electric discharge machine. In the present experimental investigation, W–Cu powder metallurgical electrodes of 325 mesh size have been used as electrodes for the deposition process. This work focuses on the post processing of deposited layer to alter the surface characteristics. Two different methods have been attempted to reduce the surface roughness. The results demonstrate the possibility of enhancing the surface finish with these methods. XRD analysis substantiates the presence of the tool materials and their carbides such as Cu, W, WC, and W2C as the major constituents in the deposited layer.