Comparison of Bi-system 2223 and 2212 thick superconducting tapes: Grain alignment, current density, and strain effects

Journal Article · Thu Aug 01 04:00:00 EDT 1991 · Journal of Applied Physics; (USA)

DOI:https://doi.org/10.1063/1.349523· OSTI ID:5683996

Sekine, H; Schwartz, J; Kuroda, T; Inoue, K; Maeda, H; Numata, K; Yamamoto, H ^[1]

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1. National Research Institute for Metals, Sengen 1-2-1, Tsukuba-shi, Ibaraki-ken, 305, Japan (US)

Bi-Sr-Ca-Cu-O (2212) and Bi-Pb-Sr-Ca-Cu-O (2223) superconductors were fabricated into silver-sheathed tapes by cold rolling and sintering. The resulting samples are compared in terms of microstructural alignment, critical current density, and strain dependence. Although both samples show good grain alignment, that of the 2212 phase is superior due to partial melting during heat treatment. This microstructural superiority is reflected in superior {ital J}{sub {ital c}} as well. The single-filament and multifilament 2212 tapes have {ital J}{sub {ital c}} {gt} 5 {times} 10{sup 4} A/cm{sup 2} and {ital J}{sub {ital c}} {gt} 1.5 {times} 10{sup 4} A/cm{sup 2} at 20 T, respectively. Each material shows a similar dependence of {ital J}{sub {ital c}} upon strain, with the 2223 phase exhibiting slightly more degradation. Furthermore, multifilamentary tapes were less affected by strain than single-filament tapes. A multifilamentary tape at 4.2 K, 0.5 T showed only a weak dependence upon strain, indicating that the strain dependence of the Bi system at low temperature may not be severe.

• OSTI ID: 5683996
• Journal Information: Journal of Applied Physics; (USA), Journal Name: Journal of Applied Physics; (USA) Vol. 70:3; ISSN 0021-8979; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
BISMUTH COMPOUNDS
BISMUTH OXIDES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
COLD PRESSING
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL CURRENT
CRYSTAL STRUCTURE
CURRENTS
ELECTRIC CURRENTS
FABRICATION
HIGH-TC SUPERCONDUCTORS
LEAD COMPOUNDS
LEAD OXIDES
MATERIALS WORKING
MICROSTRUCTURE
OXIDES
OXYGEN COMPOUNDS
PRESSING
SINTERING
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTING COILS
SUPERCONDUCTORS
SYNTHESIS
TRANSITION ELEMENT COMPOUNDS