LASER ASSISTED SURFACE MODIFICATION OFTi–6Al–4VFOR BIOIMPLANT APPLICATION

A. Biswas, U. K. Chatterjee, Lin Li, I. Manna and J. Dutta Majumdar ()
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A. Biswas: Department of Met. & Mat. Engg., I. I. T., Kharagpur, W. B. 721302, India
U. K. Chatterjee: Department of Met. & Mat. Engg., I. I. T., Kharagpur, W. B. 721302, India
Lin Li: School of Mech. Aero. & Civil Engg., Univ. Manchester, UK
I. Manna: Department of Met. & Mat. Engg., I. I. T., Kharagpur, W. B. 721302, India
J. Dutta Majumdar: Department of Met. & Mat. Engg., I. I. T., Kharagpur, W. B. 721302, India

Surface Review and Letters (SRL), 2007, vol. 14, issue 04, 531-534

Abstract: The present study aims at enhancing the wear resistance ofTi–6Al–4Vby laser surface nitriding. Laser surface treatment has been carried out by melting of the sand blastedTi–6Al–4Vsubstrate using a high power continuous wave Diode laser with nitrogen as shrouding environment (at a gas flow rate of 51/min). Laser surface nitriding led to formation of dendrites of titanium nitrides. The microhardness is improved to a maximum of 900–950 VHN (Vickers hardness number) in laser surface nitriding as compared to 260 VHN of the as-received substrate. Surface nitriding increased primary potential for pit formation (Epp1) as compared toTi–6Al–4V. Biocompatibility behavior showed a better cell viability due to surface nitriding as compared to the as-receivedTi–6Al–4V.

Date: 2007
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DOI: 10.1142/S0218625X07009700

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