Multifunctional hopeite nanocoating on Ti64 substrates by pulsed laser deposition and radio frequency magnetron sputteri
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Multifunctional hopeite nanocoating on Ti64 substrates by pulsed laser deposition and radio frequency magnetron sputtering for orthopedic implant applications: A comparative study Ashish DAS1, 2, Mukul SHUKLA1, 3, 4 1. Department of Mechanical Engineering, Motilal Nehru National Institute of Technology, Allahabad 211004, India; 2. Department of Production and Industrial Engineering, National Institute of Technology, Jamshedpur 831014, India; 3. School of Mechanical and Aerospace Engineering, Queen’s University, Belfast BT7 1NN, United Kingdom; 4. Department of Mechanical Engineering Technology, University of Johannesburg, Johannesburg PO Box 524, South Africa © Central South University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2020 Abstract: Functionalized implants demonstrate an upgraded approach in orthopedic implants, aiming to achieve long term success through improved bio integration. Bioceramic coatings with multifunctionality have arisen as an effective substitute for conventional coatings, owing to their combination of various properties that are essential for bio-implants, such as osteointegration and antibacterial character. In the present study, thin hopeite coatings were produced by Pulsed laser deposition (PLD) and radio frequency magnetron sputtering (RFMS) on Ti64 substrates. The obtained hopeite coatings were annealed at 500 °C in ambient air and studied in terms of surface morphology, phase composition, surface roughness, adhesion strength, antibacterial efficacy, apatite forming ability, and surface wettability by scanning electron microscope (SEM), X-ray diffraction (XRD), atomic force microscope (AFM), tensometer, fluorescence-activated cell sorting (FACS), simulated body fluid (SBF) immersion test and contact angle goniometer, respectively. Furthermore, based on promising results obtained in the present work it can be summarized that the new generation multifunctional hopeite coating synthesized by two alternative new process routes of PLD and RFMS on Ti64 substrates, provides effective alternatives to conventional coatings, largely attributed to strong osteointegration and antibacterial character of deposited hopeite coating ensuring the overall stability of metallic orthopedic implants. Key words: hopeite; Ti64 alloy; pulsed laser deposition; magnetron sputtering; coating; implant Cite this article as: Ashish DAS, Mukul SHUKLA. Multifunctional hopeite nanocoating on Ti64 substrates by pulsed laser deposition and radio frequency magnetron sputtering for orthopedic implant applications: A comparative study [J]. Journal of Central South University, 2020, 27(8): 2198−2209. DOI: https://doi.org/10.1007/s11771-020-4441-8.
1 Introduction Titanium alloys are largely used as bio-implants in orthopedic and dental applications
owing to their non-toxic character, high specific strength and superior biocompatibility [1]. Titanium alloys, especially Ti6Al4V systems, have some serious issues of bio-inertness and release of aluminum and vanadium metal ions, which affects
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