Improved wear resistance of functional diamond like carbon coated Ti–6Al–4V alloys in an edge loading conditions. (June 2016)

• Record Type: Journal Article
• Authors: Choudhury, Dipankar; Lackner, Jürgen M.; Major, Lukasz; Morita, Takehiro; Sawae, Yoshinori; Bin Mamat, Azuddin; Stavness, Ian; Roy, Chanchal K.; Krupka, Ivan
• Is Part Of: Journal of the mechanical behavior of biomedical materials. Volume 59(2016)
• Page Start: 586
• Page End: 595
• Publication Date: 2016-06
• Subjects: Functional diamond-like carbon -- Silicon nitride -- Wear resistance -- Edge loading -- Orthopedics implant; Biomedical materials -- Periodicals; Biomedical materials -- Mechanical properties -- Periodicals; Biomedical materials; Biomedical materials -- Mechanical properties; Periodicals; Electronic journals; 610.28
• DOI: 10.1016/j.jmbbm.2016.04.004
• Languages: English
• ISSNs: 1751-6161

Abstract

Abstract: This study investigates the durability of functional diamond-like carbon (DLC) coated titanium alloy (Ti–6Al–4V) under edge loading conditions for application in artificial hip joints. The multilayered (ML) functional DLC coatings consist of three key layers, each of these layers were designed for specific functions such as increasing fracture strength, adapting stress generation and enhancing wear resistance. A 'ball-on-disk' multi-directional wear tester was used in the durability test. Prior to the wear testing, surface hardness, modulus elasticity and Raman intensity were measured. The results revealed a significant wear reduction to the DLC coated Ti–6Al–4V disks compared to that of non-coated Ti–6Al–4V disks. Remarkably, the counterpart Silicon Nitride (Si3 N4 ) balls also yielded lowered specific wear rate while rubbed against the coated disks. Hence, the pairing of a functional multilayered DLC and Si3 N4 could be a potential candidate to orthopedics implants, which would perform a longer life-cycle against wear caused by edge loading.