Effect of electrodeposition conditions on structure and mechanical properties of Ni-W/diamond composite coatings

Ni-W/diamond composite coatings were prepared by electrodeposition from a Ni-W plating bath with diamond particles suspended into the bath. The effect of the plating parameters on microstructure and mechanical properties was investigated. The deposits reported a maximum hardness of 1207 ± 32 Hv. The film hardness is depended on the concentration of diamond particles in the plating bath and also on the size of the co-deposited diamond particles. The sample with diamond concentration of 10 g/L in the bath and co-deposited at current density of 0.15 A/cm2 reported the optimized wear resistance and diamond content in the deposit. In this paper the effect of the incorporation of diamond particles into the Ni-W matrix has been discussed in terms of the aforesaid operating conditions and particle size.