The fabrication and thermomechanical processing of Ag/Bi-2223 jelly-roll wires

J. T. Dawley, S. E. Dorris, Michael T. Lanagan, E. P. Kvam, R. B. Poeppei

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

For this feasibility study, silver/superconductor jelly-roll samples with a superconductor composition of Bi1.8Pb0.4Sr 2Ca2Cu3Ox (2223), were fabricated via a thick-film processing technique. It was found that the densification and alignment of 2223 grains along the Ag layers was crucial to achieving high critical current densities (Jc). The effects of cyclic mechanical working and heat treatment were investigated to develop a scheme to maximize Jc. The highest zero-field J0 value of 2650 A cm -2 (Ic=43 A) was obtained in a jelly roll heat treated at 815 degrees C, where the majority of the mechanical deformation was performed prior to the first heat treatment. Magnetic-field-dependence measurements made in a 50 G field showed a 23% reduction in Jc when the field was applied parallel to the current flow, and a 30% reduction when the field was applied perpendicular to the current flow. This was superior to the best comparable powder-in-tube samples.

Original languageEnglish (US)
Article number010
Pages (from-to)587-591
Number of pages5
JournalSuperconductor Science and Technology
Volume7
Issue number8
DOIs
StatePublished - 1994

Fingerprint

Superconducting materials
heat treatment
Heat treatment
wire
Wire
Magnetic field measurement
Fabrication
fabrication
densification
Processing
Densification
Silver
Thick films
Powders
thick films
critical current
alignment
silver
current density
tubes

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Condensed Matter Physics
  • Metals and Alloys
  • Materials Chemistry
  • Electrical and Electronic Engineering

Cite this

Dawley, J. T. ; Dorris, S. E. ; Lanagan, Michael T. ; Kvam, E. P. ; Poeppei, R. B. / The fabrication and thermomechanical processing of Ag/Bi-2223 jelly-roll wires. In: Superconductor Science and Technology. 1994 ; Vol. 7, No. 8. pp. 587-591.
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abstract = "For this feasibility study, silver/superconductor jelly-roll samples with a superconductor composition of Bi1.8Pb0.4Sr 2Ca2Cu3Ox (2223), were fabricated via a thick-film processing technique. It was found that the densification and alignment of 2223 grains along the Ag layers was crucial to achieving high critical current densities (Jc). The effects of cyclic mechanical working and heat treatment were investigated to develop a scheme to maximize Jc. The highest zero-field J0 value of 2650 A cm -2 (Ic=43 A) was obtained in a jelly roll heat treated at 815 degrees C, where the majority of the mechanical deformation was performed prior to the first heat treatment. Magnetic-field-dependence measurements made in a 50 G field showed a 23{\%} reduction in Jc when the field was applied parallel to the current flow, and a 30{\%} reduction when the field was applied perpendicular to the current flow. This was superior to the best comparable powder-in-tube samples.",
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The fabrication and thermomechanical processing of Ag/Bi-2223 jelly-roll wires. / Dawley, J. T.; Dorris, S. E.; Lanagan, Michael T.; Kvam, E. P.; Poeppei, R. B.

In: Superconductor Science and Technology, Vol. 7, No. 8, 010, 1994, p. 587-591.

Research output: Contribution to journalArticle

TY - JOUR

T1 - The fabrication and thermomechanical processing of Ag/Bi-2223 jelly-roll wires

AU - Dawley, J. T.

AU - Dorris, S. E.

AU - Lanagan, Michael T.

AU - Kvam, E. P.

AU - Poeppei, R. B.

PY - 1994

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