Superconductor technology: apparatus – material – process – Processes of producing or treating high temperature... – Process of making wire – tape – cable – coil – or fiber
Patent
1993-09-23
1995-07-18
King, Roy V.
Superconductor technology: apparatus, material, process
Processes of producing or treating high temperature...
Process of making wire, tape, cable, coil, or fiber
505430, 505230, 505704, 29599, 427 62, 1741251, H01L 3924, H01F 606
Patent
active
054341299
ABSTRACT:
A method of producing a high temperature long length coil of superconductor wire is disclosed. The method utilizes the "powder-in-tube" method or a similar method to form a wire. The wire is then shaped into rectangular form and wound around a mandrell. Rings, having a gap exposing the superconductor inside the silver or silver alloy tube are formed by cutting the wound wire and the rings are pressed to their final thickness. Each ring is then coated with an insulator and filed on both an outer side of one end of the gap and on an inner side of the other end of the gap. The rings are then positioned adjacent one another such that the gaps are staggered. They are placed in a manner in which the exposed superconductor on an outer side of one ring is in contact with the exposed superconductor on the inner side of an adjacent ring. The rings are then clamped together and heated to merge the superconducting material by diffusion. A long length coil is thus formed from the rings that are clamped.
REFERENCES:
patent: 4906609 (1990-03-01), Yamauchi
Flukiger, R. et al. "The Deformation of Bi(223) Tapes By Hot Rolling," Materials Issues in High-Temperature Superconductivity Spring Symposium, Apr. 12-16, 1993, p. 386.
Haldar, P. et al., "Enhancement in Critical Current Density of Bi-Pb-Sr-Ca-Cu-O Tapes By Thermomechanical Processing; Cold Rolling Versus Uniaxial Pressing" Applied Physics Letters vol. 60. No. 4, Jan. 1992 pp. 495-497.
Shibuta N. et al. "Transport Critical Current Properties of Silver-sheathed Bi-Based Supercondcuting Tapes and Coils at 4.2 D." Japanese Journal of Applied Physics, vol. 30, No. 12B, Dec. 1991, pp. L2083-L2084.
Haldar Pradeep
Motowidlo Leszek
Advanced Superconductors Inc.
King Roy V.
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