Advances in the development of silver sheathed (Bi,Pb)2223 composite conductors

Significant advances have been made in the critical current density of the technologically interesting (Bi,Pb)2223 composite conductors. Engineering current density, J/sub e/, of 9100 A/cm/sup 2/, corresponding to a filament current density, J/sub c/, of 32600 A/cm/sup 2/ (77 K, self-field) has been...

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Bibliographic Details
Published in:IEEE transactions on applied superconductivity 1995-06, Vol.5 (2), p.1145-1149
Main Authors: Carter, W.L., Riley, G.N., Otto, A., Parker, D.R., Christopherson, C.J., Masur, L.J., Buczek, D.
Format: Article
Language:English
Subjects:
Billets
Conducting materials
Conductors
Current density
Magnetic field induced strain
Powders
Silver
Superconducting filaments and wires
Superconducting materials
Thermomechanical processes
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Summary:Significant advances have been made in the critical current density of the technologically interesting (Bi,Pb)2223 composite conductors. Engineering current density, J/sub e/, of 9100 A/cm/sup 2/, corresponding to a filament current density, J/sub c/, of 32600 A/cm/sup 2/ (77 K, self-field) has been achieved by increasing the fraction of oxide in the conductor and improving the thermomechanical processing of the conductor. The filament microstructure may be further optimized by decreasing the volume fraction of secondary phases and porosity. The strain tolerance of the higher oxide fraction conductors remains adequate for applications by increasing the number of filaments in the conductors. Composite tapes with twisted filaments have been produced that have promising electrical properties in applied magnetic fields.< >
ISSN:1051-8223
1558-2515
DOI:10.1109/77.402764