Title of article :
Wetting behaviour of femtosecond laser textured Ti–6Al–4V surfaces
Author/Authors :
Alexandre Cunha، نويسنده , , Ana Paula Serro، نويسنده , , Vitor Oliveira، نويسنده , , Amélia Almeida، نويسنده , , Rui Vilar، نويسنده , , Marie-Christine Durrieu، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2013
Pages :
9
From page :
688
To page :
696
Abstract :
The aim of the present work was to investigate the wetting behaviour of biomedical grade Ti–6Al–4V alloy surfaces textured by a femtosecond laser treatment. The material was treated in ambient atmosphere using an Yb: KYW chirped-pulse-regenerative amplification laser with a wavelength of 1030 nm and a pulse duration of 500 fs. Four main types of surface textures were obtained depending on the processing parameters and laser treatment method. These textures consist of: (1) nanoscale laser-induced periodic surface structures (LIPSS); (2) nanopillars; (3) a bimodal roughness distribution texture formed of LIPSS overlapping microcolumns; (4) a complex texture formed of LIPSS overlapping microcolumns with a periodic variation of the columns size in the laser scanning direction. The wettability of the surfaces was evaluated by the sessile drop method using distilled-deionized (DD) water and Hankʹs balanced salt solution (HBSS) as testing liquids. The laser treated surfaces present a hydrophilic behaviour as well as a high affinity for the saline solution, with equilibrium contact angles in the ranges 24.1–76.2° for DD water and 8.4–61.8° for HBSS. The wetting behaviour is anisotropic, reflecting the anisotropy of the surface textures.
Keywords :
Surface texturing , Femtosecond lasers , Surface anisotropy , Ti–6Al–4V implants , Wetting behaviour
Journal title :
Applied Surface Science
Serial Year :
2013
Journal title :
Applied Surface Science
Record number :
1006426
Link To Document :
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