A comparison of Ag and Ag-alloy sheathed Bi-2223 tapes

Author

Liu, Hua K. ; Zhang, Zhong M. ; Zeng, Rong ; Horvat, Josip ; Apperley, Miles

Author_Institution

Inst. for Supercond. & Electron. Mater., Univ. of Wollongong, NSW, Australia

Volume

13

Issue

2

fYear

2003

fDate

6/1/2003 12:00:00 AM

Firstpage

3004

Lastpage

3007

Abstract

Ag and Ag-alloy sheathed Bi-2223 tapes were fabricated by a powder-in-tube technique with different configurations of the precursor and restack sheath materials: Ag, AgAu7 wt%, AgSb0.6 wt%, AgMg0.2 wt%. Analysis of the I_c and volume fractions of the Bi-2223, Bi-2212, Bi-2201 and Bi-3221 phases indicated that volume fractions of Bi-2223>90%, Bi-2212∼5%, Bi-2201∼0% and Bi-3221<2%, normally result in tapes with the highest I_c. The mechanical properties of the tapes revealed consistent results. Generally, the harder the sheath material, the higher tolerance to the bending strain and higher the tensile strength of the tape. The sequence of the alloys´ hardness from highest to lowest was AgMg0.2 wt%, AgSb0.6 wt%, AgAu7 wt% or Ag.

Keywords

bending strength; bismuth compounds; calcium compounds; critical currents; hardness; high-temperature superconductors; lead compounds; phase separation; silver; silver alloys; strontium compounds; superconducting tapes; tensile strength; (BiPb)₂Sr₂Ca₂Cu₃O₁₀-Ag; Ag sheathed Bi-2223 tape; Ag-alloy sheathed Bi-2223 tapes; bending strain; critical current; hardness; mechanical properties; phase volume fraction; powder-in-tube technique; tensile strength; Australia; Bismuth; Critical current; Current measurement; Heat treatment; Magnetic field measurement; Mechanical factors; Superconducting materials; Superconductivity; Temperature;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2003.812052

Filename

1212255