Thermodynamics of oxygen in niobium--vanadium--oxygen solid solutions

Journal Article · Sun Jan 01 04:00:00 EST 1978 · Scr. Metall.; (United States)

DOI:https://doi.org/10.1016/0036-9748(78)90253-3· OSTI ID:6516516

Steckel, G L; Altstetter, C

Several studies have been reported on the Nb--O and V--O systems utilizing the solid state galvanic cell technique for the determination of the oxygen solubility and thermodynamic properties of oxygen across the solid solution region. In this study, similar determinations have been made for the ternary Nb--V--O system over the temperature range 650-1150/sup 0/C. This system was selected because both Nb and V have relatively high oxygen solubilities. Thus the alloys were anticipated to have fairly high solubilities, enabling a broad range of oxygen concentrations to be examined in the solid solution region of each Nb--V alloy. Additionally, oxygen has a somewhat lower activity in vanadium than in niobium. Therefore, effects on the oxygen activity by substitutional solutes with a larger of smaller interaction with oxygen than the solvents could be determined by studying Nb or V-rich alloys, respectively.

• Research Organization: Univ. of Illinois, Urbana
• OSTI ID: 6516516
• Journal Information: Scr. Metall.; (United States), Journal Name: Scr. Metall.; (United States) Vol. 12; ISSN SCRMB
• Country of Publication: United States
• Language: English

Related Subjects

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