Effect of pulse electrodeposition parameters on microhardness of Ni-ZrO_2-CeO_2 nanocomposite coating

摘要

Ni-ZrCh-CeO_2 nanocomposite coating was prepared by pulse electrodeposition. The effect of addition of ZrO_2 and CeO_2 nanoparticles, average current density, duty cycle and pulse current on microhardness of Ni-ZrO_2-CeO_2 nanocomposites were studied. The results show that microhardness of nanocomposite is increased at first and then decreased with the increasing additive amounts of two kinds of nanoparticles. With increasing reverse the average current density, the microhardness of the composite coating increases. Also, the microhardness of nanocomposite fall with the increasing of pulse frequency. With the positive duty ratio increasing, the microhardness of the composite coating increase at first and then decreased, but with the increasing of the reverse duty ratio, the microhardness of nanocomposite coating is gradually decreased.