Preparation and evaluation of mechanical behavior of nanostructure Ni-P/Al2O3-SiC composite coating

In this research hybrid nanocomposite coating of Ni-P/Al2O3-SiC and Ni-P coating were codeposited and deposited by electrodeposition on copper substrate. Electrodepositions for both cases was done by DC current. Sic nanoparticles sizes and Al2O3 nanoparticles sizes which were used for preparing nanocomposite bath, were respectively 55nm and 50nm. Charactrizaton and surface morphology of coating were done by scanning electron microscopy and energy dispersive spectroscopy.The tribological behavior of the coatings were evaluated by pin-on-disc test, and microhardness of coating were also evaluated by Vickers microhardness test. Morphology of surface coating was evaluated by optical electron microscopy. Results show that adhesion of hybrid nanocomposite coating on copper substrate is perfect. Participation of nano Al2O3 particles and nano SiC particles, causes improvement in the microhardness and wear resistance of hybrid nanocomposite coating. High strength of nano Al2O3 particles and nano SiC particles, improved the microhardness and wear resistance of hybrid nanocomposite coating. Also, increases in current density for electrodeposition improve microhardness of Ni-P coating and Ni-P/Al2O3-SiC coating.