Characterization of the Micro-Abrasive Wear in Coatings of TaC-HfC/Au for Biomedical Implants

Abstract

The object of this work was the deposition of a Ta-Hf-C thin film with a gold interlayer on stainless steel, via the physical vapor deposition (PVD) technique, in order to evaluate the properties of different systems subjected to micro-abrasive wear phenomena generated by alumina particles in Ringer's solution. The surface characterization was performed using a scanning electron microscope (SEM) and atomic force microscope (AFM). The crystallographic phases exhibited for each coating were obtained by X-ray diffraction (XRD). As a consequence of modifying the composition of Ta-Hf there was evidence of an improvement in the micro-abrasive wear resistance and, for each system, the wear constants that confirm the enhancement of the surface were calculated. Likewise, these surfaces can be bioactive, generating an alternative to improve the biological fixation of the implants, therefore, the coatings of TaC-HfC/Au contribute in the development of the new generation of orthopedic implants.

Effect of Centrifugal Speed on the Anticorrosive Properties of Bismuth-Silicon Coatings by Sol-Gel on 316l Substrates

“…In the evaluated system (film-substrate), there is a cathodic reaction on the surface of the coating and an anodic reaction produced on the surface of the substrate. The results also show that the application of the BixSiyOz coating, imparts thermodynamic stability to the surface increasing the protection potential of the system 27,28 . Figure-7 shows the diffraction patterns, taken at an angle, for the coatings.…”

Evaluation of the Wear-Corrosion Process in Beta-Tricalcium(β-TCP) Films Obtained by Physical Vapor Deposition (PVD)

“…Measurements were made at 0, 720, 1440 and 2160 hours, respectively. The temperature was kept constant at 37 °C, to simulate the conditions of the human body, by immersing the electrochemical cell in a thermostatized bath circulator [30].…”

Wear and corrosion behaviour of Ti-based coating on biomedical implants

“…This posed a strenuous challenge to mankind and urged to discover a mechanically stabilized and biocompatible implant material. Physical vapour deposition (PVD), an eco-friendly technique has enabled the implant material to be coated with surface materials thereby strengthening the mechanical wear resistance [2]. In addition to this, a proper selection of coating material prompts brings about a good biocompatible implant material that is free from many health effects such as allergy, inflammation, etc.…”

“…The result reported that both the wear and corrosion resistance got enhanced with all three surface treatments. Guzman et al [2] evaluated the characteristics of micro-abrasive wear on the stainless steel coated with Ta–Hf–C/Au using PVD. A tremendous improvement in the micro-abrasive wear resistance for the coated specimen was notified.…”