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HomeMaterials Science ForumMaterials Science Forum Vol. 843Thermodynamic Modelling of Rare-Earth Elements -...

Thermodynamic Modelling of Rare-Earth Elements - Oxygen Interaction

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Abstract:

Fusibility curves of FeO–La₂O₃–Al₂O₃, FeO–Ce₂O₃–Al₂O₃, La₂O₃– Ce₂O₃–Al₂O₃ oxide systems are created based on the literature data and modern thermodynamic theories of oxide and metal melts. Admitting the oxide systems conjugation with the area of metal melts existence, we define oxide phases, which can maintain the equilibrium with metal melts of Fe–Ce–Al–O, Fe–La–Ce–Al–O systems. The surfaces of component solubility are created for above mentioned metal melts. For Fe–Ce–Al–O system it is established that the following phases can be at equilibrium with metal: Al₂O₃, Сe₂O₃, FeO∙Al₂O₃, Сe₂O₃∙11Al₂O₃, Сe₂O₃∙Al₂O₃, and the oxide melt (FeO, Al₂O₃, Сe₂O₃, СeO₂). For Fe–La–Ce–Al–O system the following oxide phases can be at equilibrium with the liquid metal: La₂O₃, Al₂O₃, Сe₂O₃, La₂O₃∙Al₂O₃, Сe₂O₃∙11Al₂O₃, Сe₂O₃∙Al₂O₃, and the oxide melt (FeO, La₂O₃, Al₂O₃, Сe₂O₃, СeO₂). Diagrams of active components consumption, which are used to establish the possibility of chosen equilibrium, are created for iron deoxidation with cerium and aluminium as well as with Ce and La at fixed Al content (0.01 wt. %).

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Materials Engineering and Technologies for Production and Processing

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Periodical:

Materials Science Forum (Volume 843)

Pages:

39-45

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.843.39

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Online since:

February 2016

Authors:

G.G. Mikhailov*, L.A. Makrovets, L.A. Smirnov

Keywords:

Cerium, Deoxidation, Lanthanum, Phase Equilibria, State Diagram, Thermodynamics

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