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Critical Current and Flux Pinning by Crystal Defects in Melt-Textured YBa2Cu3Ox

Conference ·
OSTI ID:5995023
 [1];  [1];  [1];  [1]
  1. Argonne National Laboratory (ANL), Argonne, IL (United States)
+ Show Author Affiliations
Sintered YBa2Cu3Ox bars 50 mm in length have been partially melted to develop highly textured microstructures. The bars exhibited large magnetic hysteresis and transport Jc values relative to conventional bulk YBa2Cu3Ox. Transmission electron microscopy observations revealed unique grain boundary features which are likely to be responsible for reduced weak-link effects. A high concentration of dislocations and some Y2BaCuO5 particles were present in sample matrices. After high-temperature annealing, the the intragranular Jc of the melt-textured material was considerably reduced. This reduction in Jc suggested that crystal defects such as dislocations were responsible for the stronger flux pinning in the melt-textured samples.
Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE); USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE)
DOE Contract Number:
W-31109-ENG-38
OSTI ID:
5995023
Report Number(s):
ANL/CP--72075; CONF-901125--17; ON: DE91011749
Country of Publication:
United States
Language:
English

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Related Subjects

36 MATERIALS SCIENCE
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL CURRENT
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
CURRENTS
ELECTRIC CURRENTS
ELECTRON MICROSCOPY
HIGH-TC SUPERCONDUCTORS
HYSTERESIS
MAGNETIZATION
MICROSCOPY
MICROSTRUCTURE
OXIDES
OXYGEN COMPOUNDS
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
TRANSMISSION ELECTRON MICROSCOPY
YTTRIUM COMPOUNDS
YTTRIUM OXIDES