System Zirconia-Scandia
Description
The system zirconia-scandia was investigated using x-ray diffraction analysis, differential thermal analysis, metallographic analysis, and melting point studies. Results reveal the monoclinic α1 phase (0 to 2 mol % Sc2O3), the tetragonal α2' phase (5 to 8% Sc2O3), the rhombohedral β phase (9 to 13% Sc2O3), the rhombohedral γ phase (15 to 23% Sc2O3), the rhombohedral delta phase (24 to 40% Sc2O3), and the cubic epsilon phase (77.5 to 100% Sc2O3). The monoclinic α1 phase and the tetragonal α2' phase were found to transform to the tetragonal α2 phase over a wide temperature range depending on composition. The β, γ, and α phases transformed to a cubic phase at temperatures of approx. = 6000, 11000, and 13000C, respectively. A maximum melting point of approx. = 28700C was found at approx. = 10% Sc2O3 and a eutectic at approx. = 24000C at 55% Sc2O3
Additional details
Publishing Information
- Journal Title
- J. Am. Ceram. Soc.
- Journal Volume
- 60
- Journal Issue
- 9-10
- Series
- J. Am. Ceram. Soc.
- Journal Page Range
- 399-403
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 10460787
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- ANNEALING; CRYSTAL STRUCTURE; CRYSTAL-PHASE TRANSFORMATIONS; LATTICE PARAMETERS; MELTING POINTS; METALLOGRAPHY; PHASE DIAGRAMS; QUENCHING; SCANDIUM OXIDES; THERMAL ANALYSIS; X-RAY DIFFRACTION; ZIRCONIUM OXIDES
- Descriptors DEC
- CHALCOGENIDES; COHERENT SCATTERING; DIAGRAMS; DIFFRACTION; HEAT TREATMENTS; INFORMATION; OXIDES; OXYGEN COMPOUNDS; PHASE TRANSFORMATIONS; PHYSICAL PROPERTIES; SCANDIUM COMPOUNDS; SCATTERING; THERMODYNAMIC PROPERTIES; TRANSITION ELEMENT COMPOUNDS; TRANSITION TEMPERATURE; ZIRCONIUM COMPOUNDS