Study on Ni composite coating on Al6061 substrate material with different nano particle reinforcement by electrodeposition process

Abstract

The Ni composite coating has found wide industrial applications due to their anti-wear and better functional properties. The coatings generated by the electrodeposition process are popular for its economical and flexibility in its operating conditions. The incorporation of hard micro and submicron particles in the conventional coating is providing a new window for the researchers. At the same time the use of Al6061 material in automobile industries is phenomenal for its low weight high strength ratio. In the present work, the Ni coatings with different nano particles at different particle concentration are studied. The microhardness and wear properties are evaluated for different combinations of the composite coating. Further work is carried out in order to optimize the wear parameters in respect to study the influence of normal load, sliding speed, and sliding distance on the composite coating. The lower wear rate and higher microhardness is observed for the composite coating of Ni-Al2O3 compared to rest of Ni-xx coating. The presence of Al2O3,TiO2 particles restrict movement of dislocation though the weaker ZrO2 particles undergo plastic deformation with deep grooves. The debris formed between the pin sample and disc acts as the third body for abrasive nature of wear which accelerated the wear with higher load.