A novel functional layered diamond like carbon coating for orthopedics applications

Dipankar Choudhury, Takehiro Morita, Yoshinori Sawae, Jürgen M. Lackner, Mark Towler, Ivan Krupka

    研究成果: ジャーナルへの寄稿学術誌査読

    19 被引用数 (Scopus)

    抄録

    Functional Layered "Diamond like Carbon (DLC)" coated interfaces for orthopedic load bearing applications were fabricated and assessed. They consisted of three layers, each designed for specific functions. The fabrication process was performed using magnetron sputtering at low temperatures on steel substrates. Structural investigations showed the layers possessed very fine grained, columnar microstructures with a very low density of inter columnar micro-cracks. The mechanical and surface properties such as micro hardness, wettability, roughness, modulus of elasticity, water contact angle and absorbed protein layer (γ-globulin) varied among the DLCs. The biotribological tests, conducted under simulated hip joint conditions (friction, wear, Raman intensity ratio and polyethylene wear debris) were correlated with their surface and material properties. The DLC (sample no #ML1), which were built with 0.6 μm thick tribological layer (a-C:H:Cr-a-C:16 bilayers, ratio: 1:1) and 0.15 μm thin (a-C:H) top layer was found to yield superior tribological performances at "DLC on Polyethylene" sliding pairs. On the other hand, DLC (sample no#GL3), which consist of 0.6 μm thick tribological layer (gradient layer a-C:H > a-C:N) and 0.15 μm thin (a-C:H) top layer was found to yield finest tribological performances at "DLC on DLC" sliding pairs.

    本文言語英語
    ページ(範囲)56-69
    ページ数14
    ジャーナルDiamond and Related Materials
    61
    DOI
    出版ステータス出版済み - 1月 1 2016

    !!!All Science Journal Classification (ASJC) codes

    • 電子材料、光学材料、および磁性材料
    • 化学 (全般)
    • 機械工学
    • 材料化学
    • 電子工学および電気工学

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