Effects of additives on the superconducting properties of powder-metallurgically produced Cu-Nb/sub 3/Sn composite wires
Journal Article
·
· J. Appl. Phys.; (United States)
Cu-Nb/sub 3/Sn microcomposite wires with additions of In, Ga, and Ge to the bronze and of Ta to the niobium have been produced by the hot-powder-metallurgical preparation method. The characteristic influences of the additives on the superconducting properties are discussed on the basis of measurements of critical current densities (up to fields of 19--22 T), critical temperatures as well as x-ray microprobe analyses. Although all alloying additions are incorporated into the Nb/sub 3/Sn filaments, significant enhancements of the upper critical field by 2 and 4 T, respectively, can only be achieved for Ta and Ga. With an appropriate choice of the preparation parameters the current-carrying capability is considerably improved in the field range above 12 T. The optimized current densities reach values of 10/sup 8/ and 2 x 10/sup 7/ A/m/sup 2/ at 16 and 19 T, respectively.
- Research Organization:
- Institut fuer Metallphysik, Universitaet Goettingen and Sonderforschungsbereich 126 Goettingen-Clausthal, Federal Republic of Germany
- OSTI ID:
- 6096297
- Journal Information:
- J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 54:6; ISSN JAPIA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
656102 -- Solid State Physics-- Superconductivity-- Acoustic
Electronic
Magnetic
Optical
& Thermal Phenomena-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALLOYS
COMPOSITE MATERIALS
COPPER ALLOYS
CRITICAL CURRENT
CURRENT DENSITY
CURRENTS
ELECTRIC CONDUCTIVITY
ELECTRIC CURRENTS
ELECTRICAL PROPERTIES
ELEMENTS
GALLIUM
GERMANIUM
INDIUM
MAGNETIC FIELDS
MATERIALS
METALLURGY
METALS
NIOBIUM ALLOYS
OPTIMIZATION
PARAMETRIC ANALYSIS
PHYSICAL PROPERTIES
POWDERS
SUPERCONDUCTING COMPOSITES
SUPERCONDUCTING WIRES
SUPERCONDUCTIVITY
TANTALUM
THERMODYNAMIC PROPERTIES
TIN ALLOYS
TRANSITION ELEMENTS
TRANSITION TEMPERATURE
WIRES
360104* -- Metals & Alloys-- Physical Properties
656102 -- Solid State Physics-- Superconductivity-- Acoustic
Electronic
Magnetic
Optical
& Thermal Phenomena-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALLOYS
COMPOSITE MATERIALS
COPPER ALLOYS
CRITICAL CURRENT
CURRENT DENSITY
CURRENTS
ELECTRIC CONDUCTIVITY
ELECTRIC CURRENTS
ELECTRICAL PROPERTIES
ELEMENTS
GALLIUM
GERMANIUM
INDIUM
MAGNETIC FIELDS
MATERIALS
METALLURGY
METALS
NIOBIUM ALLOYS
OPTIMIZATION
PARAMETRIC ANALYSIS
PHYSICAL PROPERTIES
POWDERS
SUPERCONDUCTING COMPOSITES
SUPERCONDUCTING WIRES
SUPERCONDUCTIVITY
TANTALUM
THERMODYNAMIC PROPERTIES
TIN ALLOYS
TRANSITION ELEMENTS
TRANSITION TEMPERATURE
WIRES