Thesis Abstract and Dissertation Abstracts
Development of Ti-Si-N Nanocomposite Coatings Using Reactive Magnetron Sputtering for Bio-Implant Applications
Abstract Category: Engineering
Course / Degree: M.Tech Nanoscience and Technology
Institution / University: Anna University of Technology Tiruchirappalli, India
Published in: 2011
Metal oxide/Nitride nanocomposite coating is a choice for many articulating biomedical implants, and the improvement of their performance is important. The interesting characteristics of hard coatings including biocompatibility, high hardness, scratch resistance, corrosion resistance and improved tribological properties. Among the surface modification methods used, a significant improvement of AISI 316L stainless steel implant performance has been obtained with TiN, SiN coatings in various combinations, and with nanocrystalline structure. Transition metal nitrides, mainly based on titanium and silicon, display a wide spectrum of interesting physical properties, which make them useful materials for a variety of different applications, such as protective coatings against wear and corrosion. In present work Ti-Si-N nanocomposite coatings were prepared by reactive magnetron sputtering on to different substrates at different power 50, 100, 150 and 200 watt at substrate temperature 400o.
The presence of different phases like TiN, TiO2 and SiN were confirmed by XPS analysis. From XRD analyses results, Ti–Si–N nanocomposite coatings are mainly composed of amorphous Si3N4 and TiN crystals with a grain size of 16 -30 nm. The Ti–Si–N coatings have somewhat mixed orientations (1 1 1), (2 2 0) and (2 0 0). The intensity of the (2 0 0) peak decreases with increasing in the content of power. Increasing the deposition power there is a slight shift to lower vibrations was observed from Raman spectra. FESEM analysis indicated that the coatings were regular with smooth structure. The wear properties of Ti-Si-N nanocomposite coatings shows improved results compared to bare MS and TiN coated MS substrates. Ti-Si-N nanocomposite coatings exhibited superior corrosion resistance compared to the SiN, TiN single layer and the bare MS (in 3.5% NaCl) and 316L substrate in simulated bodily fluid solution.
Dissertation Keywords/Search Tags:
Ti-Si-N, Bio-Implant, Reactive Sputtering
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Submission Details: Dissertation Abstract submitted by Yammani Venkat Subba Rao from India on 26-May-2011 14:59.
Abstract has been viewed 3361 times (since 7 Mar 2010).
Yammani Venkat Subba Rao Contact Details: Email: yvsrao.autrichy@gmail.com
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