CHARACTERIZATION OF WC-NI POWDER FOR HIGH-VELOCITY OXYFUEL SPRAYING

The morphology of a WC-17Ni thermal spraying powder has been studied. The structure and element distribution in the powder have been investi gated using an SEM with energy dispersive spectroscopic microanalytica l facilities. The results show that the powder particles consist of po lycrystalline tungsten carbide particles and homogeneous nominally pur e nickel coatings. No intermetallic phases or interdiffusion of tungst en into nickel or nickel into tungsten carbide have been found. The re sults obtained have been correlated with the structure of the coatings formed after high velocity oxyfuel spraying. PM/0640