Frictional Behaviour and Surface Topography Evolution of DLC-Coated Biomedical Alloys

verfasst von

David Nečas, Adam Gelnar, Benedict Rothammer, Max Marian, Matúš Ranuša, Sandro Wartzack, Martin Vrbka, Ivan Křupka, Martin Hartl

Abstract

Advanced engineering coatings offer a promising solution to enhance the longevity and performance of medical biomaterials in orthopaedic implants. This study hypothesises that diamond-like carbon (DLC) coatings exhibit distinct frictional performance based on substrate and counterface material. Three different DLC coatings were tested using a pin-on-plate test in four material combinations. Virgin and DLC-coated CoCrMo and Ti6Al4V pins were tested under sliding against UHMWPE and glass plates with simulated body fluid lubrication. Results revealed that coating composition significantly impacts frictional performance, with silicon- and oxygen-doped coatings showing great potential to minimise friction. Surprisingly, reducing contact pressure had either a neutral or somewhat negative effect. Future investigations will focus on long-term testing and lubrication analyses of these material combinations.

Organisationseinheit(en)

Institut für Maschinenkonstruktion und Tribologie

Externe Organisation(en)

Technische Universität Brünn (VRT)
Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU Erlangen-Nürnberg)
Pontificia Universidad Católica de Chile

Typ

Artikel

Journal

Biosurface and Biotribology

Band

11

Publikationsdatum

21.03.2025

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Biophysik, Biomaterialien, Biomedizintechnik, Maschinenbau, Oberflächen, Beschichtungen und Folien

Elektronische Version(en)

https://doi.org/10.1049/bsb2.70004 (Zugang: Offen)