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Transport critical current density of Ag-sheathed Pr-doped (Tl, Cr)Sr2CaCu2O7 superconductor tapes in applied magnetic field

Powder-in-tube Tl-1212 (Tl,Cr)-Sr-(Ca,Pr)-Cu-O/Ag tapes were prepared and processed with different thermomechanical treatments. The processing conditions caused the variation of the transport critical current density (Jc) in the tapes. Tapes subjected to rolling showed lower Jc compared to the press...

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Main Author: Lau, K.T.
Format: Article
Language:English
Published: Springer 2002
Subjects:
Q Science (General)
Online Access:http://eprints.utem.edu.my/id/eprint/6760/3/Transport_critical_current_density_of_Ag-sheathed_Pr-doped_%28Tl%2C_Cr%29Sr2CaCu2O7_superconductor_tapes_in_applied_magnetic_field.pdf
http://eprints.utem.edu.my/id/eprint/6760/
http://link.springer.com/article/10.1023%2FA%3A1015696414880
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spelling my.utem.eprints.67602022-02-08T10:51:59Z http://eprints.utem.edu.my/id/eprint/6760/ Transport critical current density of Ag-sheathed Pr-doped (Tl, Cr)Sr2CaCu2O7 superconductor tapes in applied magnetic field Lau, K.T. Q Science (General) Powder-in-tube Tl-1212 (Tl,Cr)-Sr-(Ca,Pr)-Cu-O/Ag tapes were prepared and processed with different thermomechanical treatments. The processing conditions caused the variation of the transport critical current density (Jc) in the tapes. Tapes subjected to rolling showed lower Jc compared to the pressed tapes. Uniaxial pressing is more effective in densifying the tape cores by forcing the grains into closer contact and enhances the connectivity between grains. All the tapes showed a majority phase of 1212. The existence of 1201 phase considerably reduced Jc in the rolled tapes. Intermediate rolling is not favorable in improving Jc for the irregular grains structure, in contrast to Bi-2223 superconductors with plate-like grains. The in-field behavior of the tapes indicates that they are dominated by weak links as Jc falls rapidly in low applied field (H<0.06 T). No anisotropic transport properties were observed for all the tapes. SEM images showed randomly oriented irregular grains making texturing difficult to achieve. Neither the grain size nor the morphology was changed significantly by the thermomechanical treatments. The observed irregular grains imply that high-angle tilt boundaries were formed with intergranular weak links. Grain morphology is suggested to be the key factor that limits the Jc in these tapes. Springer 2002 Article PeerReviewed text en http://eprints.utem.edu.my/id/eprint/6760/3/Transport_critical_current_density_of_Ag-sheathed_Pr-doped_%28Tl%2C_Cr%29Sr2CaCu2O7_superconductor_tapes_in_applied_magnetic_field.pdf Lau, K.T. (2002) Transport critical current density of Ag-sheathed Pr-doped (Tl, Cr)Sr2CaCu2O7 superconductor tapes in applied magnetic field. Journal of Materials Science: Materials in Electronics, 13. pp. 345-352. ISSN ISSN: 0957-4522 http://link.springer.com/article/10.1023%2FA%3A1015696414880
institution Universiti Teknikal Malaysia Melaka
building UTEM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknikal Malaysia Melaka
content_source UTEM Institutional Repository
url_provider http://eprints.utem.edu.my/
language English
topic Q Science (General)
spellingShingle Q Science (General)
Lau, K.T.
Transport critical current density of Ag-sheathed Pr-doped (Tl, Cr)Sr2CaCu2O7 superconductor tapes in applied magnetic field
description Powder-in-tube Tl-1212 (Tl,Cr)-Sr-(Ca,Pr)-Cu-O/Ag tapes were prepared and processed with different thermomechanical treatments. The processing conditions caused the variation of the transport critical current density (Jc) in the tapes. Tapes subjected to rolling showed lower Jc compared to the pressed tapes. Uniaxial pressing is more effective in densifying the tape cores by forcing the grains into closer contact and enhances the connectivity between grains. All the tapes showed a majority phase of 1212. The existence of 1201 phase considerably reduced Jc in the rolled tapes. Intermediate rolling is not favorable in improving Jc for the irregular grains structure, in contrast to Bi-2223 superconductors with plate-like grains. The in-field behavior of the tapes indicates that they are dominated by weak links as Jc falls rapidly in low applied field (H<0.06 T). No anisotropic transport properties were observed for all the tapes. SEM images showed randomly oriented irregular grains making texturing difficult to achieve. Neither the grain size nor the morphology was changed significantly by the thermomechanical treatments. The observed irregular grains imply that high-angle tilt boundaries were formed with intergranular weak links. Grain morphology is suggested to be the key factor that limits the Jc in these tapes.
format Article
author Lau, K.T.
author_facet Lau, K.T.
author_sort Lau, K.T.
title Transport critical current density of Ag-sheathed Pr-doped (Tl, Cr)Sr2CaCu2O7 superconductor tapes in applied magnetic field
title_short Transport critical current density of Ag-sheathed Pr-doped (Tl, Cr)Sr2CaCu2O7 superconductor tapes in applied magnetic field
title_full Transport critical current density of Ag-sheathed Pr-doped (Tl, Cr)Sr2CaCu2O7 superconductor tapes in applied magnetic field
title_fullStr Transport critical current density of Ag-sheathed Pr-doped (Tl, Cr)Sr2CaCu2O7 superconductor tapes in applied magnetic field
title_full_unstemmed Transport critical current density of Ag-sheathed Pr-doped (Tl, Cr)Sr2CaCu2O7 superconductor tapes in applied magnetic field
title_sort transport critical current density of ag-sheathed pr-doped (tl, cr)sr2cacu2o7 superconductor tapes in applied magnetic field
publisher Springer
publishDate 2002
url http://eprints.utem.edu.my/id/eprint/6760/3/Transport_critical_current_density_of_Ag-sheathed_Pr-doped_%28Tl%2C_Cr%29Sr2CaCu2O7_superconductor_tapes_in_applied_magnetic_field.pdf
http://eprints.utem.edu.my/id/eprint/6760/
http://link.springer.com/article/10.1023%2FA%3A1015696414880
_version_ 1724612152799526912
score 13.211869

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