Surface morphology modifications of titanium based implant induced by 40 picosecond laser pulses at 266 nm

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• 作者：Dubravka S. Milovanović ; Bojan B. Radak ; Biljana M. Gaković ; Dimitri Batani ; Miloš ; D. Momč ; ilović ; Milan S. Trtica
• 关键词：Metals and alloys ; Laser processing ; SEM ; Microstructure
• 刊名：Journal of Alloys and Compounds
• 出版年：2010
• 出版时间：2 July 2010
• 年：2010
• 卷：501
• 期：1
• 页码：89-92
• 全文大小：804 K

文摘

Surface modification of titanium based implant Ti6Al4V induced by an Nd:YAG laser operating at a wavelength of 266 nm, with pulses of 40 ps, is presented. It is shown that the laser beam at fluences 0.96 J cm⁻² and 0.29 J cm⁻² significantly modifies the alloy surface. The damage threshold is estimated at 0.12 J cm⁻². The irradiations at 0.96 J cm⁻² were accompanied by the occurrence of plasma. The characteristics of the damage are: (a) smoothed center of the damage area, (b) 20 nm cracks, (c) 200 nm parallel periodic surface structures (PSS). The periodicity of the PSS corresponds to the laser wavelength. Such modifications of the Ti6Al4V implant surface are applicable to medical practice. Surface morphology of the implant was monitored by optical microscopy (OM) and scanning electron microscopy (SEM) coupled to an energy dispersive spectroscopy (EDS) analyzer.