Nb/sub 3/Sn(Ti) powder metallurgy processed high field superconductors
Journal Article
·
· Appl. Phys. Lett.; (United States)
Powder metallurgy processed Nb/sub 3/Sn(Ti) superconducting wires were fabricated with Sn x-italic wt. % Ti cores for 0< or =x-italic< or =3, 16 or 22 vol % cores, and a Cu 45 wt. % Nb composite. The processing used swaging, cold hydrostatic extrusions, wire drawing and heat treatments of 750 /sup 0/C for two to four days. Nominal areal reductions of 10/sup 4/ were used. Hydride-dehydride Nb and rotating electrode processed Nb powders gave the same performance. Overall critical current densities J-italic/sub c-italic/ were measured between 4.2 and 1.8 K for applied fields up to 23 T. J-italic/sub c-italic/ increased with increased Ti and/or Sn content. The Nb/sub 3/Sn(Ti) wires using a Sn 3 wt. % Ti, 22 vol % core gave J-italic/sub c-italic/ >10/sup 4/ A/cm/sup 2/ at 20 T and 4.2 K and J-italic/sub c-italic/ = 10/sup 4/ A/cm/sup 2/ at 23 T at 1.8 K. Removal of the precompression of the matrix increased J-italic/sub c-italic/ by about a factor of 2 at 20 T and 4.2 K.
- Research Organization:
- Francis Bitter National Magnet Laboratory and Plasma Fusion Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
- OSTI ID:
- 5661091
- Journal Information:
- Appl. Phys. Lett.; (United States), Journal Name: Appl. Phys. Lett.; (United States) Vol. 48:26; ISSN APPLA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360101 -- Metals & Alloys-- Preparation & Fabrication
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
CHEMICAL COMPOSITION
COMPOSITE MATERIALS
COMPRESSION
COPPER ALLOYS
CRITICAL CURRENT
CURRENT DENSITY
CURRENTS
DATA
ELECTRIC CURRENTS
ELECTRODES
EXPERIMENTAL DATA
FABRICATION
HEAT TREATMENTS
INFORMATION
MAGNETIC FIELDS
MATERIALS
METALLURGY
NIOBIUM ALLOYS
NUMERICAL DATA
POWDER METALLURGY
SUPERCONDUCTING WIRES
TIN ALLOYS
WIRES
360101 -- Metals & Alloys-- Preparation & Fabrication
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
CHEMICAL COMPOSITION
COMPOSITE MATERIALS
COMPRESSION
COPPER ALLOYS
CRITICAL CURRENT
CURRENT DENSITY
CURRENTS
DATA
ELECTRIC CURRENTS
ELECTRODES
EXPERIMENTAL DATA
FABRICATION
HEAT TREATMENTS
INFORMATION
MAGNETIC FIELDS
MATERIALS
METALLURGY
NIOBIUM ALLOYS
NUMERICAL DATA
POWDER METALLURGY
SUPERCONDUCTING WIRES
TIN ALLOYS
WIRES