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Title: Laser surface modification of titanium alloy used as biomaterial
Authors: Zhang, CH
Zhang, S
Wang, Q
Man, HC 
Liu, CS
Keywords: Biomaterial
Laser surface modification
Medical optics and biotechnology
Titanium alloy
Issue Date: 2007
Publisher: 上海科學技術出版社
Source: 中国激光 (Chinese journal of lasers), 2007, v. 34, no. SUPPL., p. 19-22 How to cite?
Journal: 中国激光 (Chinese journal of lasers) 
Abstract: Pure titanium and titanium alloys are the optimum replacement materials for the surgical implants. Laser surface modification is an attractive method to enhance the surface hardness and wear and corrosion resistance of titanium alloys. The investigation into laser gas nitriding processing of the Ti6Al4V alloy can be used for 2 kW continuous wave Nd:YAG laser under an N2 environment. With optimum process parameters, a compact laser modified coating was achieved, free of crack and porosity. The percentage composition of pernicious elements Al and V in the nitriding coating surface is very low. Morphology, composition, frictional wear and electrochemical corrosion activities in Hank's simulated body fluid at 37°C were individually investigated by using SEM, EDX, ball-on-disc tribometer and anodic polarization measurement. The results indicated that the wear resistance and electrochemical corrosion behavior are improved significantly by laser gas nitriding without changing the properties of the Ti6A14V substrate used as biomaterial.
ISSN: 0258-7025
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