High-T sub(c) superconducting current leads

• Published in: Physica. C, Superconductivity Vol. 307; no. 1-2; pp. 23 - 28
• Main Authors: Yau, John K F, Savvides, Nick, Sorrell, C C
• Format: Journal Article
• Language: English
• Published: 01.10.1998
• ISSN: 0921-4534

Metal-sheathed high-T sub(c) superconducting current leads of J sub(c) identical with 1.6-1.8x10 super(4) A cm super(-2) at 77 K under self-field condition were fabricated using a modified short tape processing technique. It was found that section-wise uniaxial pressing can be used to provide the necessary intermediate mechanical deformation between heat treatments of long silver-sheathed (Bi,Pb) sub(2)Sr sub(2)Ca sub(2)Cu sub(3)O sub(10+x) superconductor. The overlapping of pressing up to 400 MPa does not impose non-uniformity of transport J sub(c) to the final product. By stacking of single-core tapes, multi-layer current leads can be made. The I sub(c) of this multi-layer current lead is additive, as in normal current in parallel-connected circuits. There is a lateral variation of J sub(c) in the superconducting core of these leads.