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    • Keywords


      Diamond-like carbon; plasma CVD; coatings; tribology.

    • Abstract


      Diamond-like nanocomposite (DLN) coatings have been deposited over different substrates used for biomedical applications by plasma-enhanced chemical vapour deposition (PECVD). DLN has an interconnecting network of amorphous hydrogenated carbon and quartz-like oxygenated silicon. Raman spectroscopy, Fourier transform–infra red (FT–IR) spectroscopy, transmission electron microscopy (TEM) and X-ray diffraction (XRD) have been used for structural characterization. Typical DLN growth rate is about 1 𝜇m/h, measured by stylus profilometer. Due to the presence of quartz-like Si:O in the structure, it is found to have very good adhesive property with all the substrates. The adhesion strength found to be as high as 0.6 N on SS 316 L steel substrates by scratch testing method. The Young’s modulus and hardness have found to be 132 GPa and 14.4 GPa, respectively. DLN coatings have wear factor in the order of 1 × 10-7 mm3/N-m. This coating has found to be compatible with all important biomedical substrate materials and has successfully been deposited over Co–Cr alloy based knee implant of complex shape.

    • Author Affiliations


      Awadesh Kr Mallik1 Nanadadulal Dandapat1 Prajit Ghosh2 Utpal Ganguly2 Sukhendu Jana2 Sayan Das2 Kaustav Guha3 Garfield Rebello4 Samir Kumar Lahiri2 Someswar Datta1

      1. Central Glass & Ceramic Research Institute, CSIR, 196, Raja S. C. Mullick Road, Kolkata 700 032, India
      2. Meghnad Saha Institute of Technology, Techno India Group, Kolkata 700 107, India
      3. Department of Chemistry, Durham University, Durham DH1 3LE, UK
      4. Perkin Elmer Technology Innovation Centre, Mumbai 400 059, India
    • Dates

  • Bulletin of Materials Science | News

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      Posted on July 25, 2019

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