TITLE

In situ detection of porosity initiation during aluminum thin film anodizing

AUTHOR(S)
Van Overmeere, Quentin; Nysten, Bernard; Proost, Joris
PUB. DATE
February 2009
SOURCE
Applied Physics Letters;2/16/2009, Vol. 94 Issue 7, pN.PAG
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
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.
ACCESSION #
36797924

 

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