Title :
Bronze-processed Nb3Sn multifilamentary wires for magnet systems with induction >15 T
Author :
Bliznjuk, V.A. ; Lykhin, V.A. ; Mogirevskiy, M.L. ; Sverdlov, A.V. ; Kadyrbaev, A.R. ; Mikhailov, B.P.
Author_Institution :
Exp.-Design Bur. Gorizont, Moscow, Russia
fDate :
1/1/1992 12:00:00 AM
Abstract :
The authors examine the problem of high field (B>14 T) critical current increase in multifilamentary Nb3Sn bronze-processed superconductors by means of the optimization of phase forming annealing conditions and Zr, Ti, Ta, and hydrogen alloying. Optimization of phase-forming annealing conditions makes it possible to obtain multifilament nonalloyed conductors prepared by standard bronze technology with overall critical current density jc of 2-2.5×104 A/cm2 for a field of 14 T and 1-1.8×104 A/cm2 for a field of 16 T. Hydrogen atmosphere heat treatment leads to a rise of jc by 25-30% in the field of 14 T and by 50-80% in the field of 16 T. This allows the utilization of such wires in the development of magnet systems with field induction of ⩾15 T
Keywords :
annealing; composite superconductors; critical current density (superconductivity); niobium alloys; superconducting magnets; tin alloys; type II superconductors; 14 to 16 T; Nb3Sn multifilamentary wires; bronze-processed superconductors; critical current density; field induction; high field critical current increase; multifilament nonalloyed conductors; phase forming annealing conditions; superconducting magnet systems; Alloying; Annealing; Conductors; Critical current; Hydrogen; Multifilamentary superconductors; Niobium; Standards development; Tin; Zirconium;
Journal_Title :
Magnetics, IEEE Transactions on
