Title :
Strain effects of high strength Nb3Sn wire reinforced by jelly-rolled Nb/Cu composite and modification of the reinforcement
Author :
Iwaki, Genzo ; Sato, Junichi ; Katagiri, Kazuinune ; Watanabe, Kazuo
Author_Institution :
Adv. Res. Center, Hitachi Cable Ltd., Ibaraki, Japan
fDate :
3/1/2001 12:00:00 AM
Abstract :
We are in the process of developing high strength Nb3Sn wires reinforced by unique Nb/Cu composites made in a jelly-rolling process to miniaturize high field magnets. A bronze-processed (Nb,Ti) 3Sn superconducting wire incorporating the composite with a high Nb volume fraction has been made. The wire has shown a high 0.2% proof stress at 4.2 K of 350 MPa. The strain effects such as uni-axial strain dependence and bending strain tolerance on the critical current were examined this time. The influence of the Nb volume fraction in the jelly-rolled composite reinforcement was also investigated to improve the electrical conductivity of the reinforcement
Keywords :
bending; composite superconductors; copper; critical currents; electrical conductivity; mechanical strength; niobium; niobium alloys; stress effects; tin alloys; 4.2 K; Cu; Nb; Nb3Sn; bending strain tolerance; bronze-processed (Nb,Ti)3Sn superconducting wire; critical current; electrical conductivity; high Nb volume fraction; high field magnets; high strength Nb3Sn wire; jelly-rolled Nb/Cu composite; reinforcement; strain effects; uniaxial strain dependence; Capacitive sensors; Critical current; Current measurement; Niobium; Strain measurement; Superconducting filaments and wires; Superconducting magnets; Telephony; Tensile strain; Tin;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
