Bioactivity and mechanical properties of nickel-incorporated hydrogenated carbon nanocomposite thin films

Bharathy, Vijai P and Nataraj, D and Yang, Q and Kiran, MSRN (2012) Bioactivity and mechanical properties of nickel-incorporated hydrogenated carbon nanocomposite thin films. In: SURFACE AND INTERFACE ANALYSIS, 44 (3). pp. 288-295.

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Abstract

In this paper, the influence of nickel incorporation on the mechanical properties and the in vitro bioactivity of hydrogenated carbon thin films were investigated in detail. Amorphous hydrogenated carbon (a-C : H) and nickel-incorporated hydrogenated carbon (Ni/a-C : H) thin films were deposited onto the Si substrates by using reactive biased target ion beam deposition technique. The films' chemical composition, surface roughness, microstructure and mechanical properties were investigated by using XPS, AFM, TEM, nanoindentation and nanoscratch test, respectively. XPS results have shown that the film surface is mainly composed of nickel, nickel oxide and nickel hydroxide, whereas at the core is nickel carbide (Ni3C) only. The presence of Ni3C has increased the sp(2) carbon content and as a result, the mechanical hardness of the film was decreased. However, Ni/a-C : H films shows very low friction coefficient with higher scratch-resistance behavior than that of pure a-C : H film. In addition, in vitro bioactivity study has confirmed that it is possible to grow dense bone-like apatite layer on Ni/a-C : H films. Thus, the results have indicated the suitability of the films for bone-related implant coating applications. Copyright (C) 2011 John Wiley & Sons, Ltd.

Item Type:	Journal Article
Publication:	SURFACE AND INTERFACE ANALYSIS
Publisher:	WILEY-BLACKWELL
Additional Information:	amorphous hydrogenated carbon;nickel; reactive-biased target ion beam deposition;in vitro bioactivity; mechanical properties;nanoscratch
Department/Centre:	Division of Chemical Sciences > Materials Research Centre
Date Deposited:	07 Aug 2012 05:23
Last Modified:	07 Aug 2012 06:14
URI:	http://eprints.iisc.ac.in/id/eprint/44520

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