A review on Ni based nano composite coatings

Abstract

The progress in the metal deposition methods based on electroless and electrodepostion of Ni composite coatings on various substrate surfaces has witnessed heave in the interest among researchers. Many recent applications of Ni base coatings made it possible due to their better functional properties. The large number of newer developments became most important by the invention of hard micro to nano particles. Use of these particles as a secondary elements in the composite coating can improve the functional properties of the Ni based coatings. This review reports the state-of-art knowledge available on the Ni coatings with various particle reinforcement viz., SiC, Al2O3, B4C, TiO2 using watts bath standard. It is noticed that the quality of coating and its corresponding properties depends on the coating properties. The Ni based coatings with embedded micron and nano particles have improved the mechanical and tribological properties. The charecterization studies on Ni based coatings with emphasis on wear have been carried out. The SEM and TEM are used to analyse the nano particles distribution and worn surafce morphology. The SEM images shows the delamination, pits, grooves formed on the worn surface.