The Effect of DLC Surface Coatings on Microabrasive Wear of Ti-22Nb-6Zr Obtained by Powder Metallurgy
At a Glance
Section titled âAt a Glanceâ| Metadata | Details |
|---|---|
| Publication Date | 2024-11-04 |
| Journal | Coatings |
| Authors | SĂlvio JosĂ© Gobbi, J.L.A. Ferreira, JosĂ© Alexander AraĂșjo, Paul AndrĂ©, VinĂcius AndrĂ© Rodrigues Henriques |
| Institutions | Instituto de Aeronåutica e Espaço, National Institute for Space Research |
Abstract
Section titled âAbstractâTitanium alloys have a high cost of production and exhibit low resistance to abrasive wear. The objective of this work was to carry out diamond-like carbon (DLC) coating, with dissimilar thicknesses, on Ti-22Nb-6Zr titanium alloys produced by powder metallurgy, and to evaluate its microabrasive wear resistance. The samples were compacted, cold pressed, and sintered, producing substrates for coating. The DLC coatings were carried out by PECVD (plasma-enhanced chemical vapor deposition). Free sphere microabrasive wear tests were performed using alumina (Al2O3) abrasive suspension. The DLC-coated samples were characterized by scanning electron microscopy (SEM), Vickers microhardness, coatings adhesion tests, confocal laser microscopy, atomic force microscopy (AFM), and Raman spectroscopy. The coatings did not show peeling-off or delamination in adhesion tests. The PECVD deposition was effective, producing sp2 and sp3 mixed carbon compounds characteristic of diamond-like carbon. The coatings provided good structural quality, homogeneity in surface roughness, excellent coating-to-substrate adhesion, and good tribological performance in microabrasive wear tests. The low wear coefficients obtained in this work demonstrate the excellent potential of DLC coatings to improve the tribological behavior of biocompatible titanium alloy parts (Ti-22Nb-6Zr) produced with a low modulus of elasticity (closer to the bone) and with near net shape, given by powder metallurgy processing.
Tech Support
Section titled âTech SupportâOriginal Source
Section titled âOriginal SourceâReferences
Section titled âReferencesâ- 2017 - Additive Manufacturing of Biomaterials [Crossref]
- 2009 - Ti Based Biomaterials, the Ultimate Choice for Orthopaedic ImplantsâA Review [Crossref]
- 2013 - Biocompatibility of Ti-Alloys for Long-Term Implantation [Crossref]
- 2013 - Adhesion enhancement of diamond-like carbon thin films on Ti alloys by incorporation of nanodiamond particles [Crossref]
- 2017 - The investigation of the structures and tribological properties of F-DLC coatings deposited on Ti-6Al-4V alloys [Crossref]
- 2015 - Improving tribological properties of titanium alloys by combining laser surface texturing and diamond-like carbon film [Crossref]
- 1976 - Biocompatibility Studies on Surgical-grade Titanium-, Cobalt-, and Iron-base Alloys [Crossref]
- 2017 - Metallic Implant Biomaterials [Crossref]