Article

Niobium-titanium superconducting wires with ultrafine filaments (A role of SC filament-matrix boundaries)

I.V. Kurchatov Inst. of Atomic Energy, Moscow, USSR
IEEE Transactions on Magnetics (impact factor: 1.36). 04/1988; DOI:10.1109/20.11432 pp.1138 - 1140
Source: IEEE Xplore

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.

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Keywords

cold deformation
 
copper-matrix wires 25000
 
critical current density
 
Cu matrix
 
current-carrying capacity
 
magnetic hysteresis curve
 
Nb-Ti filament-matrix boundaries
 
superconducting Nb-Ti filaments
 
Ti
 
ultrafine-filament wires
 
upper critical magnetic field
 
wires