Characterization of superconductors with artificial pinning microstructures

Author

Dietderich, D.R. ; Scanlan, R.M.

Author_Institution

Lawrence Berkeley Lab., CA, USA

Volume

5

Issue

2

fYear

1995

fDate

6/1/1995 12:00:00 AM

Firstpage

1777

Lastpage

1780

Abstract

Extension of the APC approach to Nb/sub 3/Sn requires that a second phase be introduced into the Nb/sub 3/Sn reaction layer with the intent of increasing the volume pinning strength. This can be achieved by either the refinement of the Nb/sub 3/Sn grains due to the presence of a second phase or by the second phase itself pinning flux. If a bronze-type process is to be used a different addition than Zr is required since internal oxidation of Nb is not possible. The criteria for elements to be candidates for the APC approach are discussed. The results for one of the candidates (Ag) show that it is not incorporated into the Nb/sub 3/Sn, however, its addition did increase the growth rate.<>

Keywords

alloying additions; flux pinning; niobium alloys; powder metallurgy; silver; tin alloys; type II superconductors; Ag additions; Nb/sub 3/Sn; Nb/sub 3/SnAg; artificial pinning microstructures; bronze-type process; growth rate; powder metallurgy; second phase; volume pinning strength; Current measurement; Laboratories; Microstructure; Niobium; Niobium-tin; Oxidation; Powders; Superconductivity; Wire drawing; Zirconium;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.402923

Filename

402923