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Institute of Electrical and Electronics Engineers, IEEE Transactions on Applied Superconductivity, 2(5), p. 1705-1708, 1995

DOI: 10.1109/77.402905

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Properties of rod-based artificial pinning center Nb-Ti superconductors

Journal article published in 1995 by Robert W. Heussner, Paul D. Jablonski, Peter J. Lee ORCID, David C. Larbalestier ORCID
This paper is available in a repository.
This paper is available in a repository.

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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/mm2 at 1 T, 12500 A/mm2 at 2 T and 3000 A/mm2 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 Jc. We review the impact of this deformation on the physical properties.