High-temperature superconducting ceramics: Processing-related issues and the thermodynamics of the phase transition
Thesis/Dissertation
·
OSTI ID:5399000
Various processing techniques were used to fabricate YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} and YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}}-metal composites. First superconducting particulate composites were fabricated using powder-metallurgy and liquid-phase-sintering techniques. Composites were fabricated with Ni, Cu, and Sn. The processing conditions required to fabricate these composites were investigated in detail. It was found that the contacts between individual ceramic grains controlled the transport behavior of polycrystalline 123. Various methods, including the effect of additives (Ag/Ag{sub 2}O) were investigated to reduce this contract or weak-link problem. As the field progressed, it was established that misalignment between adjacent grains in polycrystalline 123 drastically reduces the critical current density J{sub c}. In view of this, melt-processing techniques were used to fabricate to highly aligned 123 and 123/Ag composites. In addition to processing studies, a classical thermodynamical analysis across the superconducting transition to study the variation of physical quantities across the transition was conducted.
- Research Organization:
- Rochester Univ., NY (United States)
- OSTI ID:
- 5399000
- Country of Publication:
- United States
- Language:
- English
Similar Records
Studies of the superconducting behavior of polycrystalline YBa[sub 2]Cu[sub 3]O[sub 7-[delta]]
ac susceptibility and grain-boundary pinning strengths in YBa sub 2 Cu sub 3 O sub 7 minus. delta. and YBa sub 2 Cu sub 2. 985 Ag sub 0. 015 O sub 7 minus. delta
Properties of YBa sub 2 Cu sub 3 Ag sub x O sub 7 minus. delta. composite superconductors
Thesis/Dissertation
·
Tue Dec 31 23:00:00 EST 1991
·
OSTI ID:7233501
ac susceptibility and grain-boundary pinning strengths in YBa sub 2 Cu sub 3 O sub 7 minus. delta. and YBa sub 2 Cu sub 2. 985 Ag sub 0. 015 O sub 7 minus. delta
Journal Article
·
Tue May 01 00:00:00 EDT 1990
· Physical Review, B: Condensed Matter; (USA)
·
OSTI ID:6883828
Properties of YBa sub 2 Cu sub 3 Ag sub x O sub 7 minus. delta. composite superconductors
Journal Article
·
Thu Dec 14 23:00:00 EST 1989
· Journal of Applied Physics; (USA)
·
OSTI ID:7021330
Related Subjects
36 MATERIALS SCIENCE
360201 -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360207* -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
360601 -- Other Materials-- Preparation & Manufacture
360607 -- Other Materials-- Superconducting Properties-- (1992-)
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COMPOSITE MATERIALS
COPPER
COPPER COMPOUNDS
COPPER OXIDES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTS
FABRICATION
HIGH-TC SUPERCONDUCTORS
MATERIALS
MATRIX MATERIALS
METALLURGY
METALS
NICKEL
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POWDER METALLURGY
PROCESSING
SINTERING
SUPERCONDUCTING COMPOSITES
SUPERCONDUCTIVITY
SUPERCONDUCTORS
THERMODYNAMICS
TIN
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
360201 -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360207* -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
360601 -- Other Materials-- Preparation & Manufacture
360607 -- Other Materials-- Superconducting Properties-- (1992-)
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COMPOSITE MATERIALS
COPPER
COPPER COMPOUNDS
COPPER OXIDES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTS
FABRICATION
HIGH-TC SUPERCONDUCTORS
MATERIALS
MATRIX MATERIALS
METALLURGY
METALS
NICKEL
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POWDER METALLURGY
PROCESSING
SINTERING
SUPERCONDUCTING COMPOSITES
SUPERCONDUCTIVITY
SUPERCONDUCTORS
THERMODYNAMICS
TIN
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES