MoS 2 coated with Al 2O 3 for Ni–MoS 2/Al 2O 3 composite coatings by pulse electrodeposition

Abstract

The MoS 2 powders were coated with Al 2O 3 (5 wt.%) through controlling hydrolysis of Al (NO 3) 3·9H 2O. MoS 2 powder coated with Al 2O 3 was written as MoS 2/Al 2O 3 hereinafter. MoS 2/Al 2O 3 powders were put into Ni plating electrolyte bath. Cetyltrimethylammonium bromide (CTAB) — the surfactant was also put into the bath. The experiment proves that MoS 2/Al 2O 3 particles were absorbed onto the Ni plate. The amount of MoS 2/Al 2O 3 deposited on Ni plate rises with the increasing concentration of MoS 2/Al 2O 3 in the bath. The microhardness, micro-surface, phase and the tribological property of the MoS 2/Al 2O 3 multi-plating coating were measured and analyzed. The performances of microhardness and wear resistance of the Ni–MoS 2/Al 2O 3 composite are better than those of Ni–MoS 2 composite.