Development of reinforced Ag alloy sheathed Bi2223 tapes

Author

Hikichi, Y. ; Koizumi, T. ; Hirota, T. ; Imai, A. ; Hasegawa, T.

Author_Institution

Showa Electr. Wire & Cable Co. Ltd., Kawasaki, Japan

Volume

9

Issue

2

fYear

1999

fDate

6/1/1999 12:00:00 AM

Firstpage

2706

Lastpage

2709

Abstract

We developed the Ag-Mg-Sb alloy which had a tensile strength of about 500 MPa and elongation of 5.5%. The tensile strength of 150 MPa was obtained at room temperature in the Bi-2223 tape using this Ag-Mg alloy for the outer sheath. The J/sub c/ value of the Ag-Mg alloy sheathed Bi-2223 tape has come to be above 10/sup 4/ A/cm/sup 2/ at 77 K in self field. And the J/sub c/ value was kept until a tensile stress of 120 MPa was applied. The critical bending strain of the tape was the same as that of the pure Ag sheathed tape. These results indicated that this tape was tolerant of the mechanical stress in the manufacturing process and hoop stress during the magnet operation.

Keywords

bending; bismuth compounds; calcium compounds; critical current density (superconductivity); elongation; high-temperature superconductors; lead compounds; magnesium alloys; multifilamentary superconductors; silver alloys; strontium compounds; superconducting tapes; tensile strength; 77 K; Ag-Mg alloy sheath; Ag-Mg-Sb; Ag-Mg-Sb alloy; AgMg; BiPbSrCaCuO; critical bending strain; elongation; hoop stress; magnet operation; manufacturing process; mechanical stress; reinforced Ag alloy sheathed Bi2223 tapes; room temperature; self field; tensile strength; Conductivity; Electrons; Powders; Stress measurement; Superconducting cables; Superconducting filaments and wires; Superconducting magnets; Superconducting materials; Temperature measurement; Tensile stress;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.785044

Filename

785044