Properties of fiber-reinforced niobium-tin superconductor fabricated by bronze process

Author

Tateishi, H. ; Agatsuma, K. ; Arai, K. ; Umeda, M. ; Gotoh, K. ; Sadakata, N. ; Saitoh, T.

Author_Institution

Electrotech. Lab., Ibaraki, Japan

Volume

9

Issue

2

fYear

1999

fDate

6/1/1999 12:00:00 AM

Firstpage

1437

Lastpage

1440

Abstract

We are developing a fiber reinforced type of superconductor for large scale, high-field magnets. Formerly we used the sputtering process to develop a niobium-tin conductor reinforced with a tungsten fiber and showed that this type of conductor has excellent stress tolerance. For practical applications however, a conventional fabrication process like bronze process is desirable. Hence we have tried to fabricate a fiber-reinforced type niobium-tin conductor utilizing tantalum fiber as the reinforcing member, In this conductor, each niobium-tin filament has a tantalum core of about 20-/spl mu/m diameter, We adopted tantalum as the core material since it has both good ductility and mechanical strength comparable to stainless steel, This conductor showed a reasonable critical field of about 22 T and good mechanical strength compared to a niobium-tin conductor fabricated by the conventional bronze process.

Keywords

critical current density (superconductivity); ductility; fibre reinforced composites; mechanical strength; niobium alloys; superconducting transition temperature; tin alloys; tungsten; type II superconductors; NbSn-W; bronze process; critical field; ductility; fabrication process; fiber reinforced type of superconductor; high-field magnets; mechanical strength; Building materials; Conducting materials; Conductors; Fabrication; Large-scale systems; Niobium-tin; Sputtering; Stress; Superconducting magnets; Tungsten;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.784653

Filename

784653