Resumo

VASQUEZ Q, Custodio et al. Obtaining of bioactive surfaces on Ti6Al4V by laser ablation patterning. Prospect. [online]. 2014, vol.12, n.1, pp.40-45. ISSN 1692-8261.  https://doi.org/10.15665/rp.v12i1.149.

Surface patterning process was carried out by oxidation of the surface of anodized Ti6Al4V by a 1M solution of H₃PO₄ at a constant voltage of 30 V and a variable current density for 60 seconds, followed by immersion in a solution of NaOH for 24 hours at 60°C, and a heat treatment at 450°C for one hour, where it formed a stable layer of dried sodium titanate and densified, which showed a low degree of crystallinity in the XRD analysis. Patterning was performed by incidence of a low intensity laser (1 µJ), characterizing the pattern size; with 90 minutes of exposed. The resistance of the particles was studied as well as the calcium ion absorptivity through the Electrochemical Impedance Spectroscopy technique (EIS). The bioactive character was evaluated by the simulated body fluid immersion at 37°C for 7 days, generating the Ti-OH- groups formed by the ions Na⁺ and H₃O^- exchange, which combined with the Ca⁺² ions in the simulated body fluid SBF, forms amorphous calcium titanate which interacts with the phosphate ions.

Palavras-chave : Ti6Al4V; Laser lithography; SBF; Sodium titanate; Apatite.

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