Comparison of superconducting properties and residual resistivities of bronze processed Nb/sub 3/Sn wires with Ta, Ti and Ni+Zn additives
Conference
·
· IEEE Trans. Magn.; (United States)
OSTI ID:6340180
Critical current densities up to 23 T measured on a series of 19 core Nb/sub 3/Sn wires with Ta, Ti and Ni+Zn additions, prepared by the bronze route under identical conditions, show very similar results in the whole field range. After optimization, J /SUB c/ in the A15 layer was determined to 6 x 10/sup 4/ A/cm/sup 2/ at 18 T, independent on the alloying element. Parallel to the increase of J /SUB c/ at high fields, an enhancement of B* /SUB c2/ up to 26 to 27 T as well as a reduced strain sensitivity of J /SUB c/ with respect to unalloyed Nb/sub 3/Sn wires were observed in all cases. On fully reacted filamentary tapes of approx. = 10 ..mu..m thickness and approx. = 100 ..mu..m width (obtained from the same starting material) an increase of the residual resistivity from /rho//sub 0/ = 16..mu cap omega.. cm for binary Nb/sub 3/Sn to 35 - 40 ..mu cap omega.. cm for Ta alloyed Nb/sub 3/Sn (4 at%) was found. The present data are the first direct indication for the increase of /rho//sub 0/ in alloyed multifilamentary wires prepared by the bronze route. They furnish a strong evidence for the correlation between /rho//sub 0/ and the enhancement of B /SUB c2/ in alloyed Nb/sub 3/Sn wires.
- Research Organization:
- Kernforschungszentrum Karlsruhe, Institut fur Technische Physik, Karlsruhe, Postfach
- OSTI ID:
- 6340180
- Report Number(s):
- CONF-840937-
- Conference Information:
- Journal Name: IEEE Trans. Magn.; (United States) Journal Volume: MAG21:2
- Country of Publication:
- United States
- Language:
- English
Similar Records
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Conference
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Sun Dec 31 23:00:00 EST 1978
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Influence of metallurgical factors on superconducting current densities in ''bronze-processed'' Nb/sub 3/Sn multifilamentary wires
Journal Article
·
Fri Dec 31 23:00:00 EST 1982
· J. Appl. Phys.; (United States)
·
OSTI ID:6535857
Superconducting critical temperatures, critical magnetic fields, lattice parameters, and chemical compositions of ''bulk'' pure and alloyed Nb/sub 3/Sn produced by the bronze process
Journal Article
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Fri Jan 31 23:00:00 EST 1986
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·
OSTI ID:6449207
Related Subjects
36 MATERIALS SCIENCE
360101 -- Metals & Alloys-- Preparation & Fabrication
360104 -- Metals & Alloys-- Physical Properties
420201* -- Engineering-- Cryogenic Equipment & Devices
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALLOYS
BRONZE
COMPARATIVE EVALUATIONS
COPPER ALLOYS
COPPER BASE ALLOYS
CRITICAL CURRENT
CURRENT DENSITY
CURRENTS
ELECTRIC CONDUCTIVITY
ELECTRIC CURRENTS
ELECTRICAL PROPERTIES
FABRICATION
MAGNETIC FIELDS
MATERIALS TESTING
METALLURGICAL EFFECTS
NICKEL ALLOYS
NIOBIUM ALLOYS
OPTIMIZATION
PHYSICAL PROPERTIES
STRAINS
SUPERCONDUCTING WIRES
SUPERCONDUCTIVITY
TANTALUM ALLOYS
TESTING
TIN ALLOYS
TITANIUM ALLOYS
WIRES
ZINC ALLOYS
360101 -- Metals & Alloys-- Preparation & Fabrication
360104 -- Metals & Alloys-- Physical Properties
420201* -- Engineering-- Cryogenic Equipment & Devices
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALLOYS
BRONZE
COMPARATIVE EVALUATIONS
COPPER ALLOYS
COPPER BASE ALLOYS
CRITICAL CURRENT
CURRENT DENSITY
CURRENTS
ELECTRIC CONDUCTIVITY
ELECTRIC CURRENTS
ELECTRICAL PROPERTIES
FABRICATION
MAGNETIC FIELDS
MATERIALS TESTING
METALLURGICAL EFFECTS
NICKEL ALLOYS
NIOBIUM ALLOYS
OPTIMIZATION
PHYSICAL PROPERTIES
STRAINS
SUPERCONDUCTING WIRES
SUPERCONDUCTIVITY
TANTALUM ALLOYS
TESTING
TIN ALLOYS
TITANIUM ALLOYS
WIRES
ZINC ALLOYS