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In situ detection of porosity initiation during aluminum thin film anodizing

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Van Overmeere, Quentin [UCL] Nysten, Bernard [UCL] Proost, Joris [UCL]

High-resolution curvature measurements have been performed in situ during aluminum thin film anodizing in sulfuric acid. A well-defined transition in the rate of internal stress-induced curvature change is shown to allow for the accurate, real-time detection of porosity initiation. The validity of this in situ diagnostic tool was confirmed by a quantitative analysis of the spectral density distributions of the anodized surfaces. These were obtained by analyzing ex situ atomic force microscopy images of surfaces anodized for different times, and allowed to correlate the in situ detected transition in the rate of curvature change with the appearance of porosity.

Document type Article de périodique (Journal article) – Article de recherche
Access type Accès restreint
Publication date 2009
Language Anglais
Journal information "Applied Physics Letters" - Vol. 94, no. 7, p. 074103 (2009)
Peer reviewed yes
Publisher Amer Inst Physics (Melville)
issn 0003-6951
Publication status Publié
Affiliation UCL - FSA/MAPR - Département des sciences des matériaux et des procédés
Keywords aluminium ; anodisation ; atomic force microscopy ; metallic thin films ; porosity
Links
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Bibliographic reference Van Overmeere, Quentin ; Nysten, Bernard ; Proost, Joris. In situ detection of porosity initiation during aluminum thin film anodizing. In: Applied Physics Letters, Vol. 94, no. 7, p. 074103 (2009)
Permanent URL http://hdl.handle.net/2078.1/35782