Dey, A and Sinha, A and Banerjee, K and Mukhopadhyay, Anoop Kumar (2014) Tribological studies of microplasma sprayed hydroxyapatite coating at low load. Materials Technology, 29 (B1, SI). B35-B40. ISSN 1066-7857

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Abstract

For bioactive prosthetic implant applications, the present work reports the tribolgical behaviour of the recently developed, microplasma (e.g. plasmatron power < 1.5 kW) sprayed (MIPS) hydroxyapatite (HAp) coatings on Ti6Al4V substrates at low constant normal load, e. g. 200 mN. Conventionally, the macroplasma (e. g. plasmatron power < 25 kW) sprayed (MAPS) HAp coatings are used for such purpose. The phase analysis and microstructural studies of the HAp coatings were carried out by X-ray diffraction, scanning electron microscopy and energy dispersive spectroscopy. Further, the single pass scratch tests were conducted on both the bare substrates and the HAp coatings at an applied normal load of 200 mN. The average coefficient of friction (COF, mu) of the HAp coatings developed by MIPS (e.g. mu similar to 0.7) was slightly higher than that (e.g. mu similar to 0.5) of the bare Ti6Al4V substrates. The characteristic, high variability of the m data of the HAp coatings developed by MIPS; was explained in terms of the intrinsic microstructural heterogeneity and the local differences in orientations of the splats.

Item Type:	Article
Subjects:	Engineering Materials
Divisions:	Non-Oxide Ceramics & Composites
Depositing User:	Bidhan Chaudhuri
Date Deposited:	12 Dec 2014 10:32
Last Modified:	19 Dec 2014 07:12
URI:	http://cgcri.csircentral.net/id/eprint/2604

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