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Fabrication of Nb/sub 3/Al and Nb/sub 3/(Al,Ge) superconducting composite tapes by electron beam irradiation

Journal Article · · Appl. Phys. Lett.; (United States)
DOI:https://doi.org/10.1063/1.97079· OSTI ID:5603009
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Nb/sub 3/Al and Nb/sub 3/(Al,Ge) superconductors were synthesized using continuous electron beam irradiation on powder metallurgy processed Nb-Al and Nb-Al-Ge composite tapes. Transition temperatures T/sub c/(onset) of 18.5 and 20.2 K were obtained for Nb-Al and Nb-Al-Ge tapes respectively, which indicated that nearly stoichiometric Al5 compounds were formed. Critical current density J/sub c/ (for reacted area) is nearly constant at fields above 15 T, with excellent values of approx.2 x 10/sup 4/ A/cm/sup 2/ at 23 T and 4.2 K for both tapes. The excellent J/sub c/'s as well as the easy scale-up procedure indicate that electron beam irradiation is promising for the fabrication of practical Nb/sub 3/Al and Nb/sub 3/(Al,Ge) superconductors, which can generate extremely high fields of approx.25 T.

Research Organization:
National Research Institute for Metals, Tsukuba Laboratories 1-2-1, Sengen, Sakura, Niihari-gun, Ibaraki-ken 305, Japan
OSTI ID:
5603009
Journal Information:
Appl. Phys. Lett.; (United States), Journal Name: Appl. Phys. Lett.; (United States) Vol. 49:1; 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
360106 -- Metals & Alloys-- Radiation Effects
656102 -- Solid State Physics-- Superconductivity-- Acoustic
Electronic
Magnetic
Optical
& Thermal Phenomena-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALLOYS
ALUMINIUM ALLOYS
COLLISIONS
COMPOSITE MATERIALS
CRITICAL CURRENT
CURRENT DENSITY
CURRENTS
ELECTRIC CURRENTS
ELECTRON COLLISIONS
FABRICATION
GERMANIUM ALLOYS
MATERIALS
METALLURGY
NIOBIUM ALLOYS
PHYSICAL PROPERTIES
PHYSICAL RADIATION EFFECTS
POWDER METALLURGY
RADIATION EFFECTS
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
TYPE-II SUPERCONDUCTORS