Surface peformances of PVD ZrN coatings in biological environments

Type : Publication
Auteur(s) :  C.E. RAMOUL, N.E. BELIARDOUH, R. BAHI, C. NOUVEAU, A. DJAHOUDI, M.J. WALOCK
Année :  2019
Domaine : Métallurgie
Revue : TRIBOLOGY - MATERIALS, SURFACES & INTERFACES
Résumé en PDF :  (résumé en pdf)
Fulltext en PDF :  (.pdf)
Mots clés :  PVD coating, ZrN, wear, corrosion, bioadhesion

Résumé : 

Zirconium nitride (ZrN) thin films were deposited by reactive RF magnetron sputtering on Ti-6Al-4V and Si (100) substrates for potential use in biomedical applications. The tribological behaviour was evaluated against bovine bone in dry condition using a pin-on-disc apparatus. Abrasion is the primary wear mechanism observed in ZrN/bone contact. The corrosion properties were determined through two electrochemical techniques: potentiodynamic polarization and electrochemical impedance spectroscopy. The coatings with reduced oxygen content provided: (i) good resistance against corrosion when exposed to physiological solution and (ii) better anti-bioadhesion against Staphylococcus aureus bacteria.