Void Formation at the Interface of the Duplex Scale Formed on Fe-5Cr Alloy at 773 K |
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| Journal | Materials Science Forum (Volume 696) |
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| Volume | High-Temperature Oxidation and Corrosion 2010 |
| Edited by | Toshio Maruyama, Masayuki Yoshiba, Kazuya Kurokawa, Yuuzou Kawahara and Nobuo Otsuka |
| Pages | 34-38 |
| DOI | 10.4028/www.scientific.net/MSF.696.34 |
| Citation | Mitsutoshi Ueda et al., 2011, Materials Science Forum, 696, 34 |
| Online since | September, 2011 |
| Authors | Mitsutoshi Ueda, Kenichi Kawamura, Toshio Maruyama |
| Keywords | Divergence of Ionic Flux, Duplex Scale, Fe-Cr Alloy, Ionic Flux, Oxygen Chemical Potential Distribution, Void Formation |
| Abstract | Void formation in a duplex scale formed on Fe-5Cr alloy at 773 K has been elucidated by oxygen chemical potential distribution, the flux of oxide ion and its divergence. The calculation predicts that voids preferentially form at the interface between inner and outer scales in the low oxygen partial pressure in which the predominant defect of iron is interstitial ion. The flux of oxide ion changes discontinuously at this interface and the divergence of the flux gives voids. Calculated volume fraction of voids at this interface is in good agreement with that has been measured. |
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