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Changes in mass and stress during anodic oxidation and cathodic reduction of the Cu/Cu2O multilayer film

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タイトル: Changes in mass and stress during anodic oxidation and cathodic reduction of the Cu/Cu2O multilayer film
著者: Seo, Masahiro 著作を一覧する
Hagioi, Machiko 著作を一覧する
キーワード: A. Cu/Cu2O multilayer film
B. EQCM
B. Bending beam method
B. Gravimetry
B. Stress measurement
C. Anodic oxidation
C. Cathodic reduction
発行日: 2007年 1月
出版者: Elsevier Ltd
誌名: Corrosion Science
巻: 49
号: 1
開始ページ: 176
終了ページ: 185
出版社 DOI: 10.1016/j.corsci.2006.05.016
抄録: The anodic oxidation and cathodic reduction processes of the Cu/Cu2O multilayer film and pure Cu film in pH 8.4 borate buffer solution were analyzed by electrochemical quartz crystal microbalance (EQCM) for gravimetry and bending beam method (BBM) for stress measurement. The mass loss of the multilayer film during anodic oxidation at 0.8 V (SHE) in the passive region was less than that of the pure Cu film. The comparison between current transients and mass changes during anodic oxidation has succeeded in separating the anodic current density into two partial current densities of oxide film growth, iO2-, and of Cu2+ dissolution through the passive film, iCu2+. As a result, in the case of the pure Cu film, the anodic current density was mainly due to iCu2+, while in the case of the multilayer film, iCu2+ was almost equal to iO2-. The compressive stress for the multilayer film was generated during anodic oxidation, while the tensile stress for the pure Cu film was generated. The mass loss of the multilayer film during cathodic reduction at a constant current density (ic = −20 μA cm−2) was significantly less than that estimated from coulometry, suggesting that H2O produced by cathodic reduction remained in the multilayer film. The compressive stress was generated during cathodic reduction of the multilayer film, which was ascribed to H2O remained in the multilayer film.
Relation (URI): http://www.sciencedirect.com/science/journal/0010938X
資料タイプ: article (author version)
URI: http://hdl.handle.net/2115/18855
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 瀬尾 眞浩

 

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