Continuous Al5 Nb/sub 3/Ge superconducting tapes via the amorphous state
Alloys of Nb/sub 75/Ge/sub 24.5/B/sub 0.5/ were rapidly solidified into amorphous ribbons using the melt-spinning technique. After annealing continuous Al5 tapes were obtained with an average grain size of 30 nm. It was not possible to form a continuous tape by melt spinning directly into the Al5 structure since only brittle fragments were obtained. The amorphous annealed Al5 phase was close to stoichiometry with a lattice parameter of 0.514 nm and a superconducting transition temperature of 18 K. The critical current densities were 5 x 10/sup 10/ and 8 x 10/sup 8/ A/m/sup 2/ at magnetic fields of 0 and 15 T, respectively. This processing technique could be the initial step in the fabrication of multifilamentary Nb/sub 3/Ge superconducting composites.
- Research Organization:
- Metallurgy Department, University of Connecticut, Storrs, Connecticut 06268
- OSTI ID:
- 6556325
- Journal Information:
- J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 65:6; ISSN JAPIA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360101* -- Metals & Alloys-- Preparation & Fabrication
ALLOYS
AMORPHOUS STATE
ANNEALING
BORON ALLOYS
CRYSTAL STRUCTURE
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
FABRICATION
GERMANIUM ALLOYS
HEAT TREATMENTS
MECHANICAL PROPERTIES
NIOBIUM ALLOYS
NIOBIUM BASE ALLOYS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
SOLIDIFICATION
SUPERCONDUCTIVITY
SUPERCONDUCTORS