Abstract
Many variables control the critical current density (Jc) in BSCCO-2223 composites but not all of them are yet well understood, or even positively identified. One important factor is reported to be the density of the BSCCO filament, as measured by microhardness. Since different deformation processes may be used during fabrication, and each can have a different effect on the final BSCCO core density, we have made systematic investigations of the microhardness, filament uniformity, and final Je as a function of sheath hardness and whether the tape is rolled or pressed between heat treatments. Results show a strong correlation between the after-heat-treatment-microhardness and J. Rolled tapes never achieved the hardness of pressed tapes, and their Je was correspondingly lower. The degree of transformation of the BSCCO powder to the BSCCO-2223 phase was always lower in the rolled tapes than in the pressed tapes.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Y.E. High, Y. Feng, Y.S. Sung, E.E. Hellstrom, and D.C. Larbalestier, “A Study of the Competitive Reactions Occurring During the Heat Treatment of Silver-sheathed Bi1.8Pb0.4Sr2 0Ca22Cu30Oy Aerosol Spray Pyrolysis Powder In Tube Conductor”, submitted to Physica C.
S.E. Dorris, B.C. Prorok, M.T. Lanagan, S. Sinha, and R.B. Poeppel, “Synthesis of Highly Pure Bismuth 2223 By Two-Powder Process”, Physica C 212 (1–2), (1993) 66–74.
Y. Feng, Y.E. High, D.C. Larbalestier, Y.S. Sung, and E.E. Hellstrom, “Evidence for Preferential Formation of the (Bi,Pb)2Sr2Ca2Cu3Ox Phase at the Ag Interface In Ag-sheathed (Bi,Pb)2Sr2Ca2Cu30x Tapes”, Appl. Phys. Lett. 62:13 (1993) 1553–1555.
K. Osamura, S.S. Oh, and S. Ochiai, “Work Instability and Its Influence on the Critical Current Density of Silver Sheathed Bi2223 Tapes”, Supercond. Sci. Technol. 5:1, (1992) 1–6.
J. Tenbrink, M. Wilhelm, K. Heine, and H. Krauth, “Development of Technical High-Ta Superconductor Wires and Tapes”, IEEE Trans. Appl. Super. 3:1, (1993) 1123–1126.
Y. Yamada, M. Satou, S. Murase, “Microstructure and Superconducting Properties of Ag Sheathed (Bi,Pb)2Sr2Ca2Cu3Ox Tapes”, presented at ISSS (1992).
A. Umezawa, Y. Feng, H.S. Edelman, Y.E. High, D.C. Larbalestier, Y.S. Sung, and E.E. Hellstrom, “Electromagnetic Granularity, Critical Current Density, and Low-Tc Phase Formation at the Grain Boundaries In (Bi,Pb)2Sr2Ca2Cu3Ox Silver-sheathed Tapes”, Physica C 198 (1992) 261272.
L.N. Bulaevskii, L.L. Daemen, M.P. Maley, and J.Y. Coulter, “What Limits the Critical Current In High-Tc Superconducting Tapes”, to appear in Phys Rev.
K. Shibutani, Q. Li, R.L. Sabatini, M. Suenaga, L. Motowidlo, and P. Haldar, “Limiting Factors for Critical Current Densities in Bi2Sr2Ca2Cu3O10-Ag Composite Superconducting Tapes at Elevated Temperatures”, submitted to App!. Phys. Leu.
B. Hensel, J.-C. Grivel, A. Jeremie, A. Perin, A. Pollini, and R. Flükiger, “A Model for the Critical Current In (Bi, Pb)2Sr2Ca2Cu3Ox Silver-sheathed Tapes”, Physica C 205 (1993) 329–337.
J.A. Parrell, S.E. Dorris, D.C. Larbalestier, unpublished work.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1994 Springer Science+Business Media New York
About this chapter
Cite this chapter
Parrell, J.A., Dorris, S.E., Larbalestier, D.C. (1994). The Effect of Sheath Material and Deformation Method on the Oxide Core Density, Filament Uniformity, and Critical Current Density of (Bi,Pb)2Sr2Ca2Cu3OX Tapes. In: Reed, R.P., Fickett, F.R., Summers, L.T., Stieg, M. (eds) Advances in Cryogenic Engineering Materials . An International Cryogenic Materials Conference Publication, vol 40. Springer, Boston, MA. https://doi.org/10.1007/978-1-4757-9053-5_26
Download citation
DOI: https://doi.org/10.1007/978-1-4757-9053-5_26
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4757-9055-9
Online ISBN: 978-1-4757-9053-5
eBook Packages: Springer Book Archive