Surface Morphology and Phase Transitions of Anodic TiO2 Films Induced by Hydrothermal Exposure

Zhao Xiang Chen; Li Mei Ren; Yan Hong Yan; Xiao Wen Qi; Yu Lin Yang

doi:10.4028/www.scientific.net/KEM.726.271

Paper Titles

Influence of Different Gd³⁺Doping on the Upconversion Luminescence Properties and Morphology of NaYF₄:Yb,E_r
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Investigation on the Preparation and Properties of Monodispersed Spherical Y₂O₃:Dy³⁺ Phosphor
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Investigation on Synthesis and Property of Tb³⁺/Dy³⁺ Co-Doped Gd₃Al₅O₁₂ Phosphor
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Photoluminescence Properties of SrSi₂O₂N₂ Doped with Divalent Ytterbium Phosphor in Nitrogen-Rich Coordination
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Surface Morphology and Phase Transitions of Anodic TiO₂ Films Induced by Hydrothermal Exposure
p.271

Measurement and Characterization of CeO₂-TiO₂ Ion Storage Films for Electrochromic Devices
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TA Assisted Synthesis and Properties of Porous ZnO
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Influence of CeO₂ Doping on Property of SnO₂ Ceramics
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Effect of the Ratio of Co to Ni+Co on the Microstructures and Mechanical Properties of Ti(C, N)-Based Cermets
p.292

HomeKey Engineering MaterialsKey Engineering Materials Vol. 726Surface Morphology and Phase Transitions of Anodic...

Surface Morphology and Phase Transitions of Anodic TiO₂ Films Induced by Hydrothermal Exposure

Abstract:

A dense TiO₂ film was fabricated on the titanium surface using the anodization technique. Surface morphology and phase structure of anodic TiO₂ film were investigated before and after the hydrothermal exposure at 160 °C for 24 h. The hydrothermal solution was 3.5 wt% NaCl solution and the films were either immersed in NaCl solution or exposed to water vapor during the exposure. It was found that the as-prepared anodic TiO₂ film consisted primarily of amorphous oxides and exhibited a relatively smooth surface. After the hydrothermal exposure, lots of rod-like crystals were formed on the solution-immersed film, while aggregated fine nanoparticles emerged on the vapor-exposed one. Thin film X-ray diffraction analysis indicated that the hydrothermal exposure transformed amorphous oxides into crystalline anatase. The corrosion behavior investigation showed that the structural transition of anodic TiO₂ film during the exposure reduced the corrosion resistance of anodized titanium greatly.