Abstract
The main objective of this work has been the deposition of Nickel (Ni)–Graphene nanoplatelets (GNPs) composite coatings onto Ti-6Al-4V alloy plates via a pulse electrodeposition technique from a Watt’s type bath. The characterization of the coatings was done by structural surveys, hardness measurements and wear tests. In this current work, XRD and SEM analysis demonstrated the better grained and compact property of the Ni-GNPs deposits. The surface roughness of the composite coatings was significantly decreased with the addition of GNPs. Furthermore, the incorporation of GNPs into the Ni matrix improved both hardness and wear behaviour of the composite coating compared to the pure Ni coating.
Highlights
Titanium (Ti) and its alloys have been widely used in many sectors such as marine, medical, chemical, automotive, aircraft and aerospace components
If used instead of the direct current (DC), pulse current (PC) in the electrodeposition leads to several advantages including refinement of crystallites, reduction of porosity, enhanced adhesion to the substrate, more uniform distribution of the coating, and improvement of mechanical properties (Kumar et al, 2013)
It may be concluded that introduction of Graphene nanoplatelets (GNPs) leads to the refinement of the grains and improvement of the morphology uniformity in the composite coating surfaces
Summary
Titanium (Ti) and its alloys have been widely used in many sectors such as marine, medical, chemical, automotive, aircraft and aerospace components Such a wide range of their applications is related to high tensile strength, low density and high resistance to corrosion (Roodposhti et al, 2018). Their poor wear resistance due to the low resistance to plastic shearing and the relatively high friction coefficient is one of factors limiting their widespread usage in load bearing applications (Pohrelyuk et al, 2018) For this reason, some surface engineering methods can be applied to Ti and its alloys to enhance service life of many engineering components (Zhecheva et al, 2015). Bilge International Journal of Science and Technology Research 2018, 2(Special Issue): 47-52
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