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

Dipankar Choudhury, Jürgen M. Lackner, Lukasz Major, Takehiro Morita, Yoshinori Sawae, Azuddin Bin Mamat, Ian Stavness, Chanchal K. Roy, Ivan Krupka

    Research output: Contribution to journalArticlepeer-review

    21 Citations (Scopus)

    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 (Si3N4) balls also yielded lowered specific wear rate while rubbed against the coated disks. Hence, the pairing of a functional multilayered DLC and Si3N4 could be a potential candidate to orthopedics implants, which would perform a longer life-cycle against wear caused by edge loading.

    Original languageEnglish
    Pages (from-to)586-595
    Number of pages10
    JournalJournal of the Mechanical Behavior of Biomedical Materials
    Volume59
    DOIs
    Publication statusPublished - Jun 1 2016

    All Science Journal Classification (ASJC) codes

    • Biomaterials
    • Biomedical Engineering
    • Mechanics of Materials

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