Title :
Niobium-titanium superconducting wires with ultrafine filaments (A role of SC filament-matrix boundaries)
Author :
Dorofejev, G.L. ; Frolov, S.V. ; Klimenko, E.Yu. ; Filkin, V. Ya ; Nikuenkov, E.V. ; Plashkin, E.I. ; Salunin, N.I.
Author_Institution :
I.V. Kurchatov Inst. of Atomic Energy, Moscow, USSR
fDate :
3/1/1988 12:00:00 AM
Abstract :
The influence of boundaries in superconducting Nb-Ti filaments in a Cu matrix upon critical current density and upper critical magnetic field is presented. The copper-matrix wires 25000 and 480000 Nb-Ti filaments. The wires were manufactured by cold deformation without any annealing. It was found that the current-carrying capacity and the magnetic hysteresis curve of these ultrafine-filament wires are determined by the fluxoid pinning on the Nb-Ti filament-matrix boundaries. The pinning can be reduced by interdiffusion of Cu and Ti.
Keywords :
composite superconductors; critical current density (superconductivity); flux pinning; magnetic hysteresis; niobium alloys; superconducting critical field; titanium alloys; type II superconductors; NbTi-Cu; cold deformation; critical current density; current-carrying capacity; filament-matrix boundaries; fluxoid pinning; interdiffusion; magnetic hysteresis curve; superconducting wires; ultrafine filaments; upper critical magnetic field; Critical current density; Equations; Lattices; Magnetic field measurement; Magnetic fields; Magnetic flux; Magnetization; Niobium compounds; Superconducting filaments and wires; Titanium compounds;
Journal_Title :
Magnetics, IEEE Transactions on
