Morphological Analyses and Crystalline Structures of Anodic TiO₂ Thin Film on Ti6Al4V Alloy Using Phosphate and Calcium Containing Electrolyte under Different Voltage and Calcium Molarity

Abstract:

This study was aimed at evaluating morphological and crystalline structures of anodic and hydrothermal titanium oxide thin films formed on Ti6Al4V alloy in a mixture of glycerol phosphate disodium salt (GP) and calcium acetate (CA) solution at various forming environments such as CA molarity and applied voltage. Anodic oxide films were hydrothermally treated and their morphological surfaces, crystal structures and chemical compositions were characterized. It was found that TiO₂ film was formed in all surfaces of Ti6Al4V alloy specimen with porous and rough morphology and the crystal structures were mainly anatase. The anodized film morphology and the crystals structure were dependent on CA molarity and anodizing voltage. Increasing CA molarity from 0.15 to 0.30M increased the number and size of micro porous and the intensity of anatase crystals, but further increasing to 0.45M, the number and size did not change and the intensity of anatase peaks became weak. Except in 0.45M-CA, the number and size of micro porous and the intensity of anatase crystals increased gradually with increasing anodizing voltage. Ca-P crystals were precipitated on the surface of hydrothermally treated films. CA molarity associated to the crystal shape while anodizing voltage related to the amount and size precipitated crystals. CA molarity was also associated to the atomic compositions of Ca and P that precipitated on the hydrothermally treated surface film.

• Periodical: Applied Mechanics and Materials (Volume 776)
• Pages: 215-222
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.776.215
• Online since: July 2015
• Authors: I. Nyoman Gde Antara*, K.I. Made Gatot, I. Made Budiana, Dae Kue Choi
• Keywords: Crystalline Structure, Micro Porous, Surface Morphology

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