DocumentCode :
1024011
Title :
Is Jc in Nb3 Sn limited by grain-boundary flux-shear?
Author :
Hughes, D. Dew
Author_Institution :
Oxford University, Oxford, UK
Volume :
23
Issue :
2
fYear :
1987
fDate :
3/1/1987 12:00:00 AM
Firstpage :
1172
Lastpage :
1175
Abstract :
It is postulated that flux-pinning by grain-boundaries may be avoided if flux can shear and flow down paths lying in grain-boundaries. The difference in flux-pinning behaviour between NbTi, 
, and solid state reacted Nb3 Sn, 
, arises from the different morphologies of their grain-structures. The boundaries, drawn out parallel to filament axes and direction of current flow in NbTi act as effective barriers to flux motion. The boundaries of grain produced by reaction in Nb3 Sn provide paths along which flux can flow by grain-boundary shearing. An expression is developed for grain-boundary shearing which gives good agreement with experimental results.
, and solid state reacted Nb , arises from the different morphologies of their grain-structures. The boundaries, drawn out parallel to filament axes and direction of current flow in NbTi act as effective barriers to flux motion. The boundaries of grain produced by reaction in NbKeywords :
Superconducting materials; Conductors; Lattices; Lorentz covariance; Morphology; Niobium compounds; Niobium-tin; Shearing; Solid state circuits; Tin; Titanium compounds;
fLanguage :
English
Journal_Title :
Magnetics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9464
Type :
jour
DOI :
10.1109/TMAG.1987.1064999
Filename :
1064999
Link To Document :
