マグネシウムダイカストＡＺ９１Ｄの陽極酸化により生成した皮膜の構造と成長機構

DOI Web Site 被引用文献16件 参考文献13件

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タイトル別名
  • Structure and Growth Mechanism of Anodic Films Formed on Magnesium Die Cast AZ91D.
  • マグネシウム ダイカスト AZ91D ノ ヨウキョク サンカ ニ ヨリ セイセ

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抄録

The structure and the growth mechanism of anodic oxide films grown on magnesium die cast AZ91D have been studied by electron microscopy combined with an ultramicrotomy technique. The anodic films are highly uneven in thickness. This may have been caused by film destruction resulting from breakdown accompanied by gas evolution, and also by uneven anodic reaction owing to the presence of cavities and compositional irregularities at the grain boundaries. Porous cell structure with dispersed MgF2 and NaMgF3 crystalline particles is found in the films. It is assumed that anodic film growth proceeds by the formation of MgF2 and magnesium oxyhydroxide at the metal/film interface and the dissolution of the film at the pore bases. The crystallization of MgF2 and the formation of NaMgF3 subsequently proceed in the porous layer.

収録刊行物

  • 表面技術

    表面技術 47 (3), 268-272, 1996

    一般社団法人 表面技術協会

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