Effect of Nb3Sn layer structure and morphology on critical current density of multifilamentary superconductors

The microstructure and morphology of superconducting Nb3Sn layers in multifilamentary composites differing in the fabrication route (bronze technology and internal-tin method), the shape of Nb filaments (continuous, coupled and tubular) and in the mode of Ti doping (doping of bronze matrix or Nb fil...

Full description

Saved in:
Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2017-10, Vol.440, p.119-122
Main Authors: Deryagina, I.L., Popova, E.N., Patrakov, E.I., Valova-Zaharevskaya, E.G.
Format: Article
Language:English
Subjects:
Critical current density
Doping
Filaments
Grain size
Grains
Microstructure
Morphology
Multifilamentary superconductors
Nb3Sn
Niobium compounds
Structure
Superconductivity
Superconductors
Tin compounds
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The microstructure and morphology of superconducting Nb3Sn layers in multifilamentary composites differing in the fabrication route (bronze technology and internal-tin method), the shape of Nb filaments (continuous, coupled and tubular) and in the mode of Ti doping (doping of bronze matrix or Nb filaments) have been studied. Significant factors determining critical current density of these wires are the average grain sizes and the fraction of equiaxed grains in the superconducting layers. The minimal grain sizes are characteristic of the composites with tubular Nb filaments, whereas the maximal fraction of equiaxed grains is obtained in the internal-tin wires. •Jc of Nb3Sn–based strands depends on Nb3Sn grain size and fraction of equiaxed grains.•The min Nb3Sn grain size is observed in bronze-route wires with tubular Nb filaments.•The maximal fraction of equiaxed grains (96%) is obtained in the internal-tin wires.
ISSN:0304-8853
1873-4766
DOI:10.1016/j.jmmm.2016.12.091