Fabrication and characteristics of tapes and test magnets made from Ag-Clad Bi-2223 superconductors |
| |
Authors: | A N Iyer U Balachandran L R Motowidlo J G Hoehn P Haldar |
| |
Affiliation: | (1) Energy Technology Division, Argonne National Laboratory, 60439 Argonne, IL;(2) IGC Advanced Superconductors, Inc., 06704 Waterbury, CT;(3) Intermagnetics General Corporation, 12084 Guilderland, NY |
| |
Abstract: | Pb0.4Bi1.8Sr2Ca2.2Cu3Ox (Bi-2223) precursor powder was prepared by a solid-state reaction of carbonates and oxides of lead, bismuth, strontium, calcium,
and copper, and the powder was then used to fabricate silver-clad tapes by the powder-in-tube technique. Transport critical
current density (Jc) values>4×104 A/cm2 at 77K and 2×105 A/cm2 at 4.2 and 27K have been achieved in short tape samples. Long lengths of tape were tested by winding them into pancake coils.
Recently, we fabricated a test magnet by stacking ten pancake coils, each containing three 16m lengths of rolled tape, and
tested it at 4.2, 27 and 77K. A maximum generated field of 2.6 T was measured in zero applied field at 4.2K and the test magnet
generated significant self-field in background fields up to 20 T. The results are discussed in this paper. |
| |
Keywords: | Bi-2223 critical current density pancake coils thermomechanical processing |
本文献已被 SpringerLink 等数据库收录! |
|