Aluminum-stabilized superconductor and superconducting coil, and

Details Aluminum-stabilized superconductor and superconducting coil, and Aluminum-stabilized superconductor and superconducting coil, and

1991-08-28

1993-02-23

Tolin, Gerald P.

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

Superconductive type

1741251, 505924, 505879, 428651, H01F 722

Patent

active

051893860

ABSTRACT:
Disclosed is a superconductor which has an aluminum area at the center of the cross section of the superconductor and a copper-covered multifilamentary NbTi composite conductor at the periphery parts of the cross section formed around the aluminum area, wherein the cross-sectional area ratio of (Cu+Al)/NbTi is in the range of 0.5 to 3.0 and the cross-sectional area ratio of Al/Cu is in the range of 0.05 to 0.5.. The superconductor is provided by a method comprising a first step of providing a superconductor-copper composite hollow body in which copper films are applied around the superconductors, a second step of area reducing the composite hollow body, a third step of heat treating the body, a fourth step of inserting an aluminum body into the hollow of the hollow body, a fifth step of subjecting the body to working such as drawing, a sixth step of subjecting the body to working such as twisting, forming or the like, with an additional area reduction being carried out, if necessary, subsequent to the third step. A superconducting coil is made using the superconductor, and the coil is used for a magnetically levitated vehicle or a nuclear magnetic resonance apparatus.

REFERENCES:
patent: 3623221 (1967-05-01), Morton et al.
patent: 4109374 (1978-08-01), Whetstone et al.
patent: 4506109 (1985-03-01), Onishi et al.
patent: 4652697 (1987-03-01), Ando et al.
patent: 4723355 (1988-02-01), Both et al.
patent: 4752654 (1988-06-01), Iida et al.
patent: 5001020 (1991-03-01), Ohmatsu et al.
IEEE Transactions on Magnetics, vol. 21, No. 2, Mar. 1985.

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