Fabrication of TiO<sub>2</sub>/SiO<sub>2</sub> Composite Coating via a High-Temperature Self-Organizing Porous TiO<sub>2</sub> Layer on Ti

  • Miura-Fujiwara Eri
    Department of Materials and Synchrotron Radiation Engineering, Graduate School of Engineering, University of Hyogo Faculty of Materials Science and Chemistry, School of Engineering, University of Hyogo
  • Harada Hiroshi
    Department of Materials and Synchrotron Radiation Engineering, Graduate School of Engineering, University of Hyogo
  • Tanaka Yoshinobu
    Faculty of Materials Science and Chemistry, School of Engineering, University of Hyogo
  • Kikuchi Takeyuki
    Faculty of Materials Science and Chemistry, School of Engineering, University of Hyogo Department of Chemical Engineering and Materials Science, Graduate School of Engineering, University of Hyogo
  • Yamasaki Thoru
    Department of Materials and Synchrotron Radiation Engineering, Graduate School of Engineering, University of Hyogo Faculty of Materials Science and Chemistry, School of Engineering, University of Hyogo

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Other Title
  • 高温酸化による多層構造を利用した真空ゾルゲル法によるTiO<sub>2</sub>/SiO<sub>2</sub>複合被膜の創製
  • 高温酸化による多層構造を利用した真空ゾルゲル法によるTiO₂/SiO₂複合被膜の創製
  • コウオン サンカ ニ ヨル タソウ コウゾウ オ リヨウ シタ シンクウ ゾルゲルホウ ニ ヨル TiO ₂/SiO ₂ フクゴウ ヒマク ノ ソウセイ

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Abstract

<p>We studied the fabrication of a TiO2/SiO2 composite coating on Ti. At a temperature above 1100 K with oxygen partial pressure, a self-organized coating of rutile phase TiO2 is formed on a Ti substrate. The thick TiO2 coating (> 10 m) had a “piecrust-like” multilayer structure, which comprise TiO2 monolayers and gaps. A composite coating containing SiO2 was fabricated via a sol-gel method in vacuum to improve the exfoliation strength of the brittle, porous TiO2 coating. Cross-sectional SEM images revealed sufficient amounts of SiO2 in the gaps between the TiO2 monolayers in the TiO2/SiO2 composite coating, even at the interface between the oxide coating and the substrate. Exfoliation stress of the composite coating was up to 10–15 times higher than for the self-organized TiO2 coating alone, and the composite coating’s failure mode was interfacial compared with cohesive for the self-organized TiO2 coating.</p><p> </p><p>Mater. Trans. 57(2016) 2008-2014に掲載</p><p>本研究の背景をより正確にするため,実験方法,結果,考察の一部を修正し,文献の追加および順番を変更,Fig. 12を追加した.</p>

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