Title :
Experimental investigation of copper matrix longitudinal resistance in a composite Nb-Ti wire
Author :
Gubkin, I.N. ; Kozlenkova, N.I. ; Nikulin, A.D. ; Polikarpova, M.V. ; Filkin, V.
Author_Institution :
A.A. Bochvar All-Union Sci. Res. Inst. of Inorg. Mater., Moscow, Russia
fDate :
7/1/1994 12:00:00 AM
Abstract :
Copper-matrix longitudinal resistance was studied as a function of wire diameter on specimens of multifilamentary Nb-Ti wire with filaments coated by a Nb layer. Experimental results are compared with the Sondheimer calculations (1952) for a monofilament conductor as well as with the Cavalloni calculations (1982) for an ideal wire with hexagonally located filaments. It has been shown that the best fit with the experiment is provided by the Sondheimer approximation. Comparison of the results of this work with other authors´ data obtained for the specimens with no niobium barrier, allows us to single out the influence of a pure size effect and diffusion of Ti on the resistivity
Keywords :
composite superconductors; copper; electric resistance; niobium alloys; titanium alloys; Cavalloni calculations; Cu; Cu matrix longitudinal resistance; Nb; Nb layer; Nb-Ti; Sondheimer calculations; composite Nb-Ti wire; hexagonally located filaments; monofilament conductor; multifilamentary Nb-Ti wire; pure size effect; wire diameter; Conductivity; Conductors; Copper; Electric resistance; Electrical resistance measurement; Electrons; Multifilamentary superconductors; Niobium; Superconducting filaments and wires; Temperature;
Journal_Title :
Magnetics, IEEE Transactions on
