Solubility and thermodynamic properties of vanadium--oxygen solid solutions

Journal Article · Wed Dec 01 04:00:00 EST 1976 · Acta Metall.; (United States)

DOI:https://doi.org/10.1016/0001-6160(76)90030-4· OSTI ID:7324686

Steckel, G L; Altstetter, C J

A thermodynamic study has been made of the vanadium-oxygen system utilizing the solid state galvanic cell technique. Investigations were made over the temperature range 700 to 1200/sup 0/C (973 to 1473/sup 0/K) with a ThO/sub 2//Y/sub 2/O/sub 3/ electrolyte. The terminal solubility of oxygen in vanadium was determined. The activity of oxygen obeys Henry's law for the temperatures of this investigation for compositions up to 3.2 at. percent oxygen. For higher compositions the activity coefficient shows positive deviations from Henry's law. A mathematical expression was determined to describe the activity coefficient as a function of temperature and composition. The change in the thermodynamic properties of oxygen when molecular oxygen dissolves in vanadium and the equilibrium oxygen pressure over vanadium-oxygen solid solutions were determined. The terminal solubility and equilibrium oxygen pressures for the vanadium-oxygen system were compared to those for the niobium-oxygen and tantalum-oxygen systems.

• Research Organization: Univ. of Illinois, Urbana
• OSTI ID: 7324686
• Journal Information: Acta Metall.; (United States), Journal Name: Acta Metall.; (United States) Vol. 24:12; ISSN AMETA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
CRYOGENIC FLUIDS
DISPERSIONS
ELEMENTS
FLUIDS
HIGH TEMPERATURE
METALS
MIXTURES
NONMETALS
OXYGEN
PHYSICAL PROPERTIES
SOLID SOLUTIONS
SOLUBILITY
SOLUTIONS
SORPTIVE PROPERTIES
SURFACE PROPERTIES
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENTS
VANADIUM
VERY HIGH TEMPERATURE