Elastic constants and Debye temperature of polycrystalline Y/sub 1/Ba/sub 2/Cu/sub 3/O/sub 7-//sub x/
Journal Article
·
· J. Mat. Res.; (United States)
OSTI ID:6089947
Using ultrasonic methods, we determined the quasi-isotropic elastic stiffnesses of void-containing Y/sub 1/Ba/sub 2/Cu/sub 3/O/sub 7-//sub x/. By a composite-material model, these were corrected to the void-free state. From these, the Debye characteristic temperature was calculated. All the elastic stiffnesses fall well below those of polycrystalline BaTiO/sub 3/, an approximate crystal-structural building block of Y/sub 1/Ba/sub 2/Cu/sub 3/O/sub 7-//sub x/. The low apparent stiffness may result from oxygen vacancies, which soften interionic forces. Also, it may result from microcracks, which reduce elastic stiffness without lowering mass density.
- Research Organization:
- Fracture and Deformation Division, Institute for Materials Science and Engineering, National Bureau of Standards, Boulder, Colorado 80303
- OSTI ID:
- 6089947
- Journal Information:
- J. Mat. Res.; (United States), Journal Name: J. Mat. Res.; (United States) Vol. 2:6; ISSN JMREE
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360203* -- Ceramics
Cermets
& Refractories-- Mechanical Properties
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
ACOUSTIC MEASUREMENTS
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
CRYSTALS
DEBYE TEMPERATURE
ELASTICITY
MECHANICAL PROPERTIES
OXIDES
OXYGEN COMPOUNDS
POINT DEFECTS
POLYCRYSTALS
SUPERCONDUCTORS
TENSILE PROPERTIES
TRANSITION ELEMENT COMPOUNDS
VACANCIES
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
360203* -- Ceramics
Cermets
& Refractories-- Mechanical Properties
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
ACOUSTIC MEASUREMENTS
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
CRYSTALS
DEBYE TEMPERATURE
ELASTICITY
MECHANICAL PROPERTIES
OXIDES
OXYGEN COMPOUNDS
POINT DEFECTS
POLYCRYSTALS
SUPERCONDUCTORS
TENSILE PROPERTIES
TRANSITION ELEMENT COMPOUNDS
VACANCIES
YTTRIUM COMPOUNDS
YTTRIUM OXIDES