Investigation of structural and tribological properties of duplex surface treated pure titanium

Abstract

Commercial pure titanium (CP-Ti) is used in many engineering fields because of its superior properties such as excellent corrosion resistance, high strength/weight ratio, and biocompatibility. However, it is not available at the desired rate, since the CP-Ti has poor wear resistance. For this reason, many surface treatments have been applied to improve the poor tribological properties of the CP-Ti. In this study, duplex surface treatments, which are the combination of treatments of electroless Ni-B coating and plasma nitriding, were applied on the surfaces of the CP-Ti. Structural properties of the different surfaces of the treated materials were investigated using scanning electron microscopy (SEM) and X-ray diffraction (XRD). Microhardness measurements were made for the determination of mechanical properties and the pin-on-disk wear tests were made to determine the tribological properties. It was observed that poor wear resistance of the CP-Ti was improved with duplex surface treatments. The results showed that surface hardness, friction coefficient, and surface roughness of coated samples were better than of uncoated CP-Ti. K e y w o r d s : titanium, wear, electroless Ni-B, plasma nitriding, duplex

A Study of Wear in Thin Coatings Applied to Convex-Concave Gearings

“…The elimination of the negative influence of sudden change in chemical composition on the triological characteristics at the interface between the coating and substrate can be achieved, for example, by creating a layer using surface hardening processes (chemical-thermal treatment) [26]. The nano-hardness of the coatings was determined at loads of 2.5 mN and 0.5 mN.…”

Effect of plasma nitriding treatment on structural, tribological and electrochemical properties of commercially pure titanium

“…[1][2][3][4] However, they have a poor wear resistance. [5][6][7][8] Plasma nitriding method and other surface modification methods are commonly used to increase the surface hardness of titanium and its alloys, and enhance its poor tribological properties (such as wear and cell compatibility). [9][10][11][12][13][14] d-TiN and e-Ti 2 N phases form on the surface of titanium through plasma nitriding method which is a thermochemical surface treatment.…”