Development of a large current capacity conductor using Bi-system superconductors

Citation
Y. Aoki et al., Development of a large current capacity conductor using Bi-system superconductors, PHYSICA C, 335(1-4), 2000, pp. 1-5
Citations number
4
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICA C
ISSN journal
0921-4534 → ACNP
Volume
335
Issue
1-4
Year of publication
2000
Pages
1 - 5
Database
ISI
SICI code
0921-4534(200006)335:1-4<1:DOALCC>2.0.ZU;2-1
Abstract
We developed a new strong Rutherford cable using Bi2Sr2CaCu2Oy (Bi-2212) hi gh temperature superconducting (HTS) wire, which consisted of 427 supercond ucting filaments and AgMgSb alloy outer sheath. This wire exhibited excelle nt critical current (I-c) and critical current density (J(c)) values at 4.2 K in self-field (285 A and 340 000 A/cm(2), respectively) and a room tempe rature tensile strength of 180 MPa. The Rutherford cable was prepared with a NiCr alloy strip as a cable core. The degradation of full cable I-c induc ed by Ni diffusion was reduced by introducing a ceramic barrier layer betwe en the Bi-2212 superconducting wires and the NiCr cable core. A full cable I-c value of 3500 A at 4.2 K in self-field was obtained in short sample fab ricated by using a cable core with a ZrO2 film barrier layer. Finally, we f abricated an 80-m-long Rutherford cable by using a cable core with a MgO ta pe as a barrier layer and evaluated its full cable I-c. I-c values of 17-m- long sections cut from a continuous 80-m-long cable, were greater than 2700 A at 4.2 K in self-field. (C) 2000 Elsevier Science B.V. All rights reserv ed.