Titanium or tantalum additions to Nb/sub 3/Sn layers from reinforcement fibers in fiber-reinforced-superconductors

Author

Arai, K. ; Tateishi, H. ; Umeda, M. ; Agatsuma, K.

Author_Institution

Electrotech. Lab., Tsukuba, Japan

Volume

5

Issue

2

fYear

1995

fDate

6/1/1995 12:00:00 AM

Firstpage

1591

Lastpage

1594

Abstract

Fiber-reinforced-superconductors (FRS) of Nb/sub 3/Sn were prepared using titanium and tantalum fibers. Their superconducting characteristics were estimated by separating the effects of prestrain from them. The results have shown that the tantalum fiber functions both as a reinforcement for FRS and as a source that supplies tantalum elements to improve the high-field properties of Nb/sub 3/Sn. The characteristics were degraded inversely when a titanium fiber was used. In the case of preparing a FRS using a titanium-added niobium target, the characteristics improved. The discrepancy in global pinning force between monofilamentary FRS and multifilamentary FRS is also shown.<>

Keywords

alloying additions; fibre reinforced composites; flux pinning; heat treatment; materials preparation; multifilamentary superconductors; niobium alloys; sputter deposition; tantalum alloys; tin alloys; titanium alloys; type II superconductors; Nb/sub 3/Sn layers; Nb/sub 3/SnTa; Nb/sub 3/SnTi; Ta additions; Ti additions; fiber-reinforced-superconductors; global pinning force; heat treatment; high-field properties; materials preparation; monofilamentary superconductor; multifilamentary superconductor; prestrain effects separation; reinforcement fibers; sputtering; superconducting characteristics; type II superconductor; Critical current; Niobium; Niobium-tin; Sputtering; Superconducting epitaxial layers; Temperature; Tensile strain; Tin; Titanium; Tungsten;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.402877

Filename

402877