Void Formation at the Interface of the Duplex Scale Formed on Fe-5Cr Alloy at 773 K

Mitsutoshi Ueda; Kenichi Kawamura; Toshio Maruyama

doi:10.4028/www.scientific.net/MSF.696.34

Paper Titles

Preface, Organizers, Committees and Sponsors

Predicting Internal Oxidation: Building on the Wagner Model
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Compatible Coating System to Provide Long-Life and High-Reliability
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Ionic Transport under Chemical Potential Gradients - Kinetic Demixing and Decomposition in Metal Oxides and Scale Growth in High-Temperature Oxidation
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Void Formation at the Interface of the Duplex Scale Formed on Fe-5Cr Alloy at 773 K
p.34

The Reactive Element Effect – Past, Present and Future
p.39

Dissociative Adsorption of Carbonaceous Gases on Ni Containing Representative Elements
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Discussions on some Properties of Alumina Scales and their Protectiveness
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The Future of Alumina-Forming Alloys: Challenges and Applications for Power Generation
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HomeMaterials Science ForumMaterials Science Forum Vol. 696Void Formation at the Interface of the Duplex...

Void Formation at the Interface of the Duplex Scale Formed on Fe-5Cr Alloy at 773 K

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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Periodical:

Materials Science Forum (Volume 696)

Pages:

34-38

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.696.34

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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

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