Superconductor technology: apparatus – material – process – High temperature devices – systems – apparatus – com- ponents,... – Superconducting wire – tape – cable – or fiber – per se
Patent
1996-08-30
1998-09-01
King, Roy V.
Superconductor technology: apparatus, material, process
High temperature devices, systems, apparatus, com- ponents,...
Superconducting wire, tape, cable, or fiber, per se
505211, 505704, 1741251, 428930, H01L 3900, H01B 1200
Patent
active
058011242
ABSTRACT:
The invention provides a superconducting ceramic laminate including a superconducting tape mechanically coupled to, and compressively strained to 0.1% or more under a predetermined load by, at least one cladding tape. The material and thickness of the cladding tape or tapes are selected relative to the material and thickness of the superconducting tape to locate the neutral axis so that, under a predetermined heavy load, the maximum compressive strain on any superconducting portion of the superconducting tape is less than the critical compressive strain and the maximum tensile strain on any superconducting portion of the superconducting tape under a predetermined load is less than the critical tensile strain. By "heavy load" is meant a load on the laminate equivalent to a load on the unlaminated superconducting tape selected for the laminate including a surface bend strain on the unlaminated superconducting tape of at least 0.1%. The laminate provides high critical current capacity, improved strain tolerance, superior critical current retention, and high packing factors. Articles comprising the laminates, such as coils and cables, are also provided.
REFERENCES:
patent: 4617789 (1986-10-01), Borden
patent: 5059582 (1991-10-01), Chung
patent: 5104849 (1992-04-01), Shiga et al.
patent: 5116809 (1992-05-01), Tsuno et al.
patent: 5151406 (1992-09-01), Sawada et al.
patent: 5312802 (1994-05-01), Hayashi et al.
patent: 5372991 (1994-12-01), Hayashi et al.
S.X. Dou et al.; "Effect of Silver on Phase Formation and Superconducting Properties of Bi-2223/Ag Tapes"; vol. 5, No. 2, pp. 1830-1833, Jun. 1995; University of Wollongong, Wollongong, Australia.
Buczek David M.
Gamble Bruce B.
Manlief Michael D.
Riley, Jr. Gilbert N.
Scudiere John D.
American Superconductor Corporation
King Roy V.
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