Accession Number : AD0266459

Title :   THERMODYNAMIC INVESTIGATION OF CERAMIC MATERIALS AT ELEVATED TEMPERATURES

Corporate Author : CINCINNATI UNIV OHIO

Personal Author(s) : HOCH,MICHAEL

Report Date : NOV 1961

Pagination or Media Count : 1

Abstract : Structures investigated were FeO, TiO, VO, and NbO (all NaCl structure). They belong in 2 groups: One group is FeO where only iron vacancies are present. The other group is TiO, VO,AND NbO where both anion and cation vacancies can be found. In both groups the concentration of vacancies is quite large. First, mathematical expressions for the interaction energy between vacancies were derived. In the compounds investigated, the defects occurred only as vacancies exhibited by both components. The grand partitionnction for a cstal with only vacancies present is presented. (Author)

Descriptors :   *CERAMIC MATERIALS, *HIGH TEMPERATURE, *REFRACTORY MATERIALS, *THERMODYNAMICS, CHROMIUM ALLOYS, CHROMIUM COMPOUNDS, IRON COMPOUNDS, MATHEMATICAL PREDICTION, NICKEL ALLOYS, NIOBIUM COMPOUNDS, OXIDES, PHASE STUDIES, THERMOCHEMISTRY, TITANIUM COMPOUNDS, VANADIUM COMPOUNDS, X RAY DIFFRACTION, ZIRCONIUM COMPOUNDS

Distribution Statement : APPROVED FOR PUBLIC RELEASE