Deoxidation thermodynamics of cerium and lanthanum in liquid iron
Journal Article
·
· Metall. Trans., B; (United States)
The deoxidation thermodynamics of the Fe-Ce-O and Fe-La-O systems are estimated by combining the free energies of solution of cerium and lanthanum in iron, obtained from the respective phase diagrams, with the standard free energies of formation of cerium and lanthanum oxides given in the literature. Values for the deoxidation constants (w/o Ce)/sup 2/ . (w/o O)/sup 3/ and (w/o La)/sup 2/ . (w/o O)/sup 3/ of about 1 x 10/sup -20/ are predicted at steelmaking temperatures. These predicted values are much lower than those obtained experimentally. It is suggested that refractory interactions, and sampling and analytical difficulties, in both laboratory and industrial determinations of these deoxidation constants, lead to erroneously high results.
- Research Organization:
- McMaster Univ., Hamilton, Ontario
- OSTI ID:
- 7265655
- Journal Information:
- Metall. Trans., B; (United States), Journal Name: Metall. Trans., B; (United States) Vol. 6B:1; ISSN MTTBC
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360105 -- Metals & Alloys-- Corrosion & Erosion
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
ALLOYS
CERIUM COMPOUNDS
CERIUM OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
DIAGRAMS
ELEMENTS
ENERGY
FLUIDS
FREE ENERGY
IRON ALLOYS
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
LIQUID METALS
LIQUIDS
METALS
OXIDES
OXYGEN COMPOUNDS
PHASE DIAGRAMS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
REDUCTION
THERMODYNAMIC PROPERTIES
THERMODYNAMICS
VERY HIGH TEMPERATURE
360105 -- Metals & Alloys-- Corrosion & Erosion
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
ALLOYS
CERIUM COMPOUNDS
CERIUM OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
DIAGRAMS
ELEMENTS
ENERGY
FLUIDS
FREE ENERGY
IRON ALLOYS
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
LIQUID METALS
LIQUIDS
METALS
OXIDES
OXYGEN COMPOUNDS
PHASE DIAGRAMS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
REDUCTION
THERMODYNAMIC PROPERTIES
THERMODYNAMICS
VERY HIGH TEMPERATURE