Fabrication of TiO₂/SiO₂ Composite Coating via a High-Temperature Self-Organizing Microporous TiO₂ Layer on Ti

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  • 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
  • Tanaka Yoshinobu
    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
  • 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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タイトル別名
  • Fabrication of TiO<sub>2</sub>/SiO<sub>2</sub> Composite Coating via a High-Temperature Self-Organizing Microporous TiO<sub>2</sub> Layer on Ti

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<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 μm) 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>

収録刊行物

  • MATERIALS TRANSACTIONS

    MATERIALS TRANSACTIONS 57 (12), 2008-2014, 2016

    公益社団法人 日本金属学会

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