Multiwire conductor having greatly increased interwire resistanc

Electricity: conductors and insulators – Conduits – cables or conductors – Conductor structure

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29599, 29825, 156 50, 156155, 174126S, 174128S, 228200, 335216, 423613, 423614, H01B 708, H01B 1200

Patent

active

044265506

ABSTRACT:
An improved multiwire conductor of the type which is mechanically stabilized by a tin based solder filler. A solder filled conductor is heated to a temperature above its melting point for a period long enough to allow a substantial amount of copper to be dissolved from the wires comprising the conductor. The copper forms the brittle intermetallic compound Cu.sub.5 Sn.sub.6 with tin in the solder. After cooling the conductor is flexed causing a random cracking of the solder, and thereby increasing the interwire resistance of the conductor. The subject invention is particularly adapted for use with braided, ribbon-type solder filled superconductors.

REFERENCES:
patent: 3184303 (1965-05-01), Grobin, Jr.
patent: 3472944 (1969-10-01), Morton et al.
patent: 3548078 (1970-12-01), Albrecht
patent: 3638154 (1972-01-01), Sampson
patent: 3954572 (1976-05-01), Ziegler
patent: 4079187 (1978-03-01), Fillunger
patent: 4161062 (1979-07-01), Agatsuma et al.
Accelerator Superconducting Magnets Give Headaches; Physics Today; Apr. 1981, pp. 17-20.
A Productive Colloration; Brookhaven Bulletin; vol. 35, No. 12; Mar. 27, 1981.

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