Deposition and characterization of diamond-like nanocomposite coatings grown by plasma enhanced chemical vapour deposition over different substrate materials |
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Authors: | AWADESH KR MALLIK NANADADULAL DANDAPAT PRAJIT GHOSH UTPAL GANGULY SUKHENDU JANA SAYAN DAS KAUSTAV GUHA GARFIELD REBELLO SAMIR KUMAR LAHIRI SOMESWAR DATTA |
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Affiliation: | 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
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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 ${upmu} $ m/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 mm 3 /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. |
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