COMPOSITE ELECTROFORMING TECHNOLOGY OFFABRICATING NICKEL-GRAPHITE COMPOSITES

The process of the elect rolytic codeposition of nickel-graphite in nickel sulfamate solution was investigated. The result s show that the plating variables have different influence on the volume f raction of graphite particlesin elect rodeposited composites. The volume f raction of graphite incorporated in deposit increases with increasingconcent ration of suspended particles in solution, and then remains constant . There are maximums related to the current density and flow velocity, while temperature and p H values exert an adverse effect . Guglielmi’s model can beused at low current densities for the composite elect roforming system. The microhardness and friction coefficient ofNi-graphite composites decrease with increasing particle concent ration in solution. The wear mass loss also decreases, but it increases at the graphite concent ration of 30 g/ L.