ゾル・ゲルコーティング-Zr酸化物に覆われたアルミニウムのアノード酸化 Anodizing of Alumiun Coated with Zirconium Oxide by Sol-Gel Coating

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Aluminum specimens were covered with zirconium oxide film by a sol-gel coating and galvanostatically anodized in a neutral borate solution. The time variation in anode potential during anodizing was monitored, and the structure and dielectric properties of the anodic oxide film were studied by TEM, EDX, RBS, and impedance measurement.<br>We found that the anode potential increases with time, and that the slope of the potential-time curve increases with increasing the numbers of sol-gel dip coatings. During anodizing, an anodic oxide film, which consisted of an inner Al<sub>2</sub>O<sub>3</sub> layer and an outer Al-Zr composite oxide layer, formed at the interface between Zr-oxide and the substrate. The thickness of the inner layer increased with anodizing time, and the thickness of the outer layer peaked before decreasing with time. The capacitance of the specimen after sol-gel coating and anodizing was 20% higher than that without sol-gel coating. The dielectric property of anodic oxide films was correlated with film structure.<br>The mechanism of anodic oxide films growth on the spceimen covered with Zr-oxide is discussed in terms of the porosity distribution in the Zr-oxide layer and the outward transport of Zr<sup>4+</sup> ions across the composite oxide layer during anodizing.

収録刊行物

  • 表面技術 = The Journal of the Surface Finishing Society of Japan  

    表面技術 = The Journal of the Surface Finishing Society of Japan 50(4), 359-366, 1999-04-01 

    The Surface Finishing Society of Japan

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各種コード

  • NII論文ID(NAID)
    10002112197
  • NII書誌ID(NCID)
    AN1005202X
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    09151869
  • NDL 記事登録ID
    4707905
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z17-291
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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