Void Formation in Magnetite Scale Formed on Iron at 823 K -Elucidation by Chemical Potential Distribution- |
| Journal |
Materials Science Forum (Volumes 522 - 523) |
| Volume |
High-Temperature Oxidation and Corrosion 2005 |
| Edited by |
Shigeji Taniguchi, Toshio Maruyama, Masayuki Yoshiba, Nobuo Otsuka and Yuuzou Kawahara |
| Pages |
37-44 |
| DOI |
10.4028/www.scientific.net/MSF.522-523.37 |
| Online since |
August, 2006 |
| Authors |
Mitsutoshi Ueda,
Kenichi Kawamura,
Toshio Maruyama
|
| Keywords |
Chemical Potential Distribution, Divergence, Magnetite Scale, Void Formation |
| Abstract |
Estimation of void formation in oxide scale is important for predicting exfoliation of the
oxide scale. Void formation in magnetite scale formed on iron at 823 K has been elucidated by
chemical potential distribution, flux of oxide ion and its divergence. This calculation also estimates a
effective diffusion coefficient, which includes both lattice diffusion and grain boundary diffusion in
magnetite scale. The resulting effective diffusion coefficients give the quantitative elucidation of the
morphology of the magnetite scale. The divergence of oxide ion explains well a position and an
amount of void in magnetite scale. |
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