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Proceedings Paper

Surface modification induced by UV nanosecond Nd:YVO4 laser structuring on biometals
Author(s): M. Paula Fiorucci; Ana J. López; Alberto Ramil
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Paper Abstract

Laser surface texturing is a promising tool for improving metallic biomaterials performance in dental and orthopedic bone-replacing applications. Laser ablation modifies the topography of bulk material and might alter surface properties that govern the interactions with the surrounding tissue. This paper presents a preliminary evaluation of surface modifications in two biometals, stainless steel 316L and titanium alloy Ti6Al4V by UV nanosecond Nd:YVO4. Scanning electron microscopy of the surface textured by parallel micro-grooves reveals a thin layer of remelted material along the grooves topography. Furthermore, X-ray diffraction allowed us to appreciate a grain refinement of original crystal structure and consequently induced residual strain. Changes in the surface chemistry were determined by means of X-ray photoelectron spectroscopy; in this sense, generalized surface oxidation was observed and characterization of the oxides and other compounds such hydroxyl groups was reported. In case of titanium alloy, oxide layer mainly composed by TiO2 which is a highly biocompatible compound was identified. Furthermore, laser treatment produces an increase in oxide thickness that could improve the corrosion behavior of the metal. Otherwise, laser treatment led to the formation of secondary phases which might be detrimental to physical and biocompatibility properties of the material.

Paper Details

Date Published: 22 August 2014
PDF: 8 pages
Proc. SPIE 9286, Second International Conference on Applications of Optics and Photonics, 92862F (22 August 2014); doi: 10.1117/12.2063782
Show Author Affiliations
M. Paula Fiorucci, Univ. da Coruña (Spain)
Ana J. López, Univ. da Coruña (Spain)
Alberto Ramil, Univ. da Coruña (Spain)

Published in SPIE Proceedings Vol. 9286:
Second International Conference on Applications of Optics and Photonics
Manuel Filipe P. C. Martins Costa; Rogério Nunes Nogueira, Editor(s)

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