Abstract
Surface modification by deposition of hard coatings is a way to overpass the poor wear resistance of some metallic materials and one potential material is the Diamond-Like Carbon (DLC). We investigated the wear behavior, and the adhesion of the DLC deposited on a Ti6Al4V (Ti64) alloy after Surface Mechanical Attrition Treatment (SMAT). The SMAT was applied using 100Cr6 steel balls, and the DLC was deposited through the sputtering method. The nano-hardness was evaluated using a MTS Nano Indenter XP. The adhesion of the DLC was evaluated using a CSM Revetest, and the wear tests was performed in a reciprocating linear tribometer from CSM Instruments. The mean wear rate for the Ti64 was 437x10-6 mm3/N/m against 5x10-6 mm3/N/m for the Ti64+SMAT+DLC. The SMAT reduced the wear rate of the DLC coating, showing that the SMAT might be a viable treatment with promising results regarding the DLC wear resistance.
Highlights
Ti-based alloys are considered bioinert and biocompatible, and due to its low density, low Young's modulus and high corrosion resistance, are widely used in the manufacturing of orthopedic implants
The objective of the present work was to evaluate the wear behavior, and adhesion of the Diamond-Like Carbon (DLC) deposited on a Ti6Al4V alloy previously submitted to Surface Mechanical Attrition Treatment (SMAT)
It would be expected that the SMAT produced a higher surface roughness on the Ti6Al4V samples since that generates random directional ball impacts causing superficial plastic deformations
Summary
Ti-based alloys are considered bioinert and biocompatible, and due to its low density, low Young's modulus and high corrosion resistance, are widely used in the manufacturing of orthopedic implants. Among the Ti-based alloys, the Ti6Al4V is the most used because of its interesting properties like strength-to-weight ratio, corrosion resistance, and toughness 1. The Ti6Al4V has poor wear resistance and low hardness 1 avoiding its use in parts exposed to the sliding movement as in joint prosthesis. Diamond-Like Carbon (DLC) is a strong candidate for coating on Ti6Al4V due to its high hardness, low coefficient of friction and chemical stability 2. The wear resistance of the DLC reduces drastically the amount and size of the wear debris minimizing the possibility of the aseptic loosening of the prosthesis
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
