Title :
Properties of rod-based artificial pinning center Nb-Ti superconductors
Author :
Heussner, R.W. ; Jablonski, P.D. ; Lee, P.J. ; Larbalestier, D.C.
Author_Institution :
Appl. Supercond. Center, Wisconsin Univ., Madison, WI, USA
fDate :
6/1/1995 12:00:00 AM
Abstract :
We have fabricated rod based artificial pinning center (APC) composites from rods of Nb-Ti and Nb as matrix and pinning center respectively. Critical current densities of 19000 A/mm/sup 2/ at 1 T, 12500 A/mm/sup 2/ at 2 T and 3000 A/mm/sub 2/ at 5 T were achieved in a conductor containing Nb 47 wt.% Ti with 24 vol% Nb pins. Microscopy revealed a progressive degradation of the original hexagonal pinning centers from an ordered array towards a more random ribbon-type microstructure as the composites were drawn towards their peak J/sub c/. We review the impact of this deformation on the physical properties.<>
Keywords :
composite superconductors; critical current density (superconductivity); deformation; flux pinning; materials preparation; niobium; niobium alloys; scanning electron microscopy; titanium alloys; type II superconductors; 1 T; 2 T; 5 T; NbTi-Nb; SEM; critical current density; deformation; ordered array; random ribbon-type microstructure; rod based artificial pinning center composites; superconductors; Conducting materials; Conductors; Costs; Critical current density; Fabrication; Flux pinning; Microstructure; Niobium; Pins; Superconductivity;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
