Deposition and Characterization of D-Gun Sprayed WC-Co Coating with Self-Lubricating Property
A WC-Co coating with self-lubricating property was deposited by detonation gun (D-gun) process, using a WC-Co powder doped with a MoS2-Ni powder, under a proper spray condition. It is proved that the MoS2 composition was kept in the resulting coating by SEM, XRD and EPMA. Evaluation on sliding wear property indicates that the MoS2 composition plays an important role in lowering both coefficient of friction and wear rate for the resulting coating, which is confirmed by observations on wear track. It suggests that the deposition of WC-Co coating with self-lubricating property by D-gun spray is feasible by controlling lubricant powder and spray conditions, which can exhibit higher sliding wear resistance.
Hyungsun Kim, Junichi Hojo and Soo Wohn Lee
H. Du et al., "Deposition and Characterization of D-Gun Sprayed WC-Co Coating with Self-Lubricating Property", Materials Science Forum, Vols. 544-545, pp. 215-218, 2007