Porous/barrier composite films formed on aluminum by re-anodizing

Sachiko Ono*, Tetsuya Osaka, Noboru Masuko

*この研究の対応する著者

研究成果: Article査読

3 被引用数 (Scopus)

抄録

The structure and the formation behavior of porous / barrier composite oxide films formed on aluminum by re-anodizing in a boric acid / ammonium borate solution have been studied by transmission electron microscopy combined with ultramicrotomy. The porous film was formed in an oxalic acid solution. The porous / barrier composite film is amorphous, whereas a crystalline film grows when the porous film is hydratcd before the re-anodizing to form hydrous alumina platelets in the pores. The size and the volume of both crystals and voids increase with anodizing time. The thickness of the various types of barrier films formed at a given current density up to 350 V in the borate solution decreases in the order: the amorphous region of the barrier film > the barrier / porous amorphous composite film > the hydrated porous / barrier crystalline composite film > the crystalline region of the barrier film.

本文言語English
ページ(範囲)1005-1011
ページ数7
ジャーナルDenki Kagaku
64
9
DOI
出版ステータスPublished - 1996
外部発表はい

ASJC Scopus subject areas

  • 化学 (全般)

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