Very high critical current density of bronze-processed (Nb,Ti)/sub 3/Sn superconducting wire

Author

Sakamoto, Hiroo ; Higuchi, M. ; Endoh, S. ; Kimura, A. ; Wada, K. ; Meguro, S. ; Ikeda, M.

Author_Institution

Furukawa Electr. Co. Ltd., Nikko, Japan

Volume

10

Issue

1

fYear

2000

fDate

3/1/2000 12:00:00 AM

Firstpage

971

Lastpage

974

Abstract

From the viewpoint of fabricability, the Sn content in the bronze matrix of bronze-processed Nb/sub 3/Sn wire is limited to below 15 wt%. This limitation results in a higher matrix-to-niobium ratio of bronze-processed Nb/sub 3/Sn wire than other high-Sn-content wires, such as the tube-processed Nb/sub 3/Sn wire. This is a reason why the non-Cu critical current density (J/sub C/) of the bronze-processed Nb/sub 3/Sn wire is lower than that of tube-processed Nb/sub 3/Sn wire. Therefore, increasing the Sn content in the bronze matrix and reducing the bronze ratio is the key to enhancing the non-Cu J/sub C/ of the bronze-processed Nb/sub 3/Sn wire. A bronze-processed Nb/sub 3/Sn superconducting wire with a Cu-16wt%Sn-0.2wt%Ti matrix was successfully fabricated on a production scale. The wire achieved a high non-Cu J/sub C/ of approximately 1000 A/mm/sup 2/ at 12 T and 4.2 K.

Keywords

composite superconductors; critical current density (superconductivity); crystal microstructure; heat treatment; materials preparation; niobium alloys; tin alloys; titanium alloys; type II superconductors; (NbTi)/sub 3/Sn; 12 T; 4.2 K; Cu-Sn-Ti matrix; CuSnTi; Sn content; bronze matrix; bronze-processed (Nb,Ti)/sub 3/Sn superconducting wire; bronze-processed Nb/sub 3/Sn wire; fabricability; very high critical current density; Copper; Critical current; Critical current density; Intermetallic; Magnetic fields; Niobium; Niobium-tin; Superconducting filaments and wires; Tin; Titanium;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.828393

Filename

828393