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Soares T.A.,Albert Ludwigs University of Freiburg | Soares T.A.,Institute For Werkstoffe And Anwendungstechnik Tuttlingen Iwat | Mozaffari H.,Institute For Werkstoffe And Anwendungstechnik Tuttlingen Iwat | Reinecke H.,Albert Ludwigs University of Freiburg
Surface and Coatings Technology

In this article, the influence of crystal structures of multiphase electrodes during a high voltage anodization process was demonstrated. The experimental was performed using a 3D-printed microcell and the investigated material was Ti-6Al-4V (α. +. β). The results showed that, for a limited range of potential (70. V to 103. V), atomic diffusion in β-phase was higher than in α-phase. Consequently, the growth of the oxide layer was not uniform. β-Phase generally grew 120. nm more than α-phase. An increase of voltage induced dielectric rupture, which produced uniform porous structures. This dielectric rupture also contributed to the oxide phase transformation (e.g. anatase to rutile). © 2015 Elsevier B.V. Source

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