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Effect of Fe and partial pressure of oxygen on the formation and phase transformation behavior of Al2O3 scale / S. Hayashi in Materials and corrosion, Vol. 63 N° 10 (Octobre 2012) 

Public ISBD [article]  in Materials and corrosion > Vol. 63 N° 10 (Octobre 2012) . - pp. 862–868 Titre : Effect of Fe and partial pressure of oxygen on the formation and phase transformation behavior of Al2O3 scale Type de document : texte imprimé Auteurs : S. Hayashi, Auteur ; Y. Takada, Auteur ; I. Saeki, Auteur Année de publication : 2013 Article en page(s) : pp. 862–868 Note générale : Génie mécanique Langues : Anglais (eng) Résumé : The effect of oxygen partial pressure on the phase transformation of Al2O3 scale on various Fe–Al alloys with and without very thin (∼100 nm) Fe coating was investigated. Fe-coating on Fe–Al alloys can effectively suppress metastable Al2O3 formation, but little effect was observed when the samples were oxidized in a low partial pressure of oxygen. Under the low equation image atmosphere, metastable to stable α-Al2O3 scale phase transformation on both Fe-coated and non-coated Fe–Al alloys was significantly delayed. The lattice spacing of α-Al2O3 scale formed in air decreased with increasing alloy Al content. Further decrease in the lattice spacing of α-Al2O3 scale was observed when the alloy was oxidized in low equation image. The results obtained clearly indicated that the formation of Fe2O3 or Fe3+ in metastable Al2O3 accelerated the metastable to stable α-Al2O3 scale transformation. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201206731/abstract [article] Effect of Fe and partial pressure of oxygen on the formation and phase transformation behavior of Al2O3 scale [texte imprimé] / S. Hayashi, Auteur ; Y. Takada, Auteur ; I. Saeki, Auteur . - 2013 . - pp. 862–868. Génie mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 63 N° 10 (Octobre 2012) . - pp. 862–868 Résumé : The effect of oxygen partial pressure on the phase transformation of Al2O3 scale on various Fe–Al alloys with and without very thin (∼100 nm) Fe coating was investigated. Fe-coating on Fe–Al alloys can effectively suppress metastable Al2O3 formation, but little effect was observed when the samples were oxidized in a low partial pressure of oxygen. Under the low equation image atmosphere, metastable to stable α-Al2O3 scale phase transformation on both Fe-coated and non-coated Fe–Al alloys was significantly delayed. The lattice spacing of α-Al2O3 scale formed in air decreased with increasing alloy Al content. Further decrease in the lattice spacing of α-Al2O3 scale was observed when the alloy was oxidized in low equation image. The results obtained clearly indicated that the formation of Fe2O3 or Fe3+ in metastable Al2O3 accelerated the metastable to stable α-Al2O3 scale transformation. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201206731/abstract