Effect of single and duplex surface treatments on wear properties of CP-Ti

Abstract

Wear behaviours of nitrided, anodised and duplex treated commercially pure (CP)-Ti were investigated using a pin on disc tribotester. First, CP-Ti was nitrided and then anodised at different temperatures and times. Phase structure, cross-section and surface hardness of coatings were examined with XRD, SEM and microhardness tester. Formation of TiN and anatase phases were observed after nitriding and anodising respectively. Thickness of the oxide layer along with hardness increased with increasing the anodisation potential and time. A porous structure with circular tube also formed on the surface after anodising. The duplex treatment caused the formation of rutile phase in the oxide layer. It was finally demonstrated that the duplex treatment increased the load bearing capacity due to an increase in the core hardness of CP-Ti which resulted in a reduction of the friction coefficient and wear rate of CP-Ti.

Investigation of wear behavior of titanium oxide films, produced by anodic oxidation, on commercially pure titanium in vacuum conditions

“…Similar studies supported that oxidation reduced the friction coefficient of titanium. Alsaran and Albayrak [23] studied the wear properties of single anodizing at different process parameters and anodizing on pre-nitrided Cp-Ti. They showed that while friction coefficient value of the untreated sample is 0.5, this value reduced to 0.26 after anodizing depending on process parameters.…”

Evaluation of structure and properties of various sol–gel nanocoatings on biomedical titanium surface

“…2d). Also, it is important to mention here that the significant reduction in COF of composite coated substrate may be resulted from the considerable increase in some vital properties of formed film especially structure stability, surface hardness, film thickness [29] and roughness [30].…”

Elastic modulus and damping of coatings based on microscopic defects

“…Studies show that conditions such as the deposition process and load can affect the coefficient of friction of hard coatings [21,22]; therefore, studying the effect of friction coefficient on damping has significance in engineering. Simulations were performed with different friction coefficients, constant stress ( σ x = -160 MPa, σ y = 100 Mpa), and constant frequency (100 Hz); and the energy dissipation and loss factor were calculated from the hysteresis curve.…”