Interplay between cold densification and malic acid addition (C4H6O5) for the fabrication of near-isotropic MgB2 conductors for magnet application
The effect of cold high pressure densification (CHPD) on anisotropy of the critical current density (Jc) in « in situ » single core binary and alloyed MgB2 tapes has been determined as a function of temperatures at 4.2 K, 20 K and 25 K as well as at applied magnetic fields up to 19 T. The study incl...
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doaj-8feba2d7d1164f1989fc79f168abe3432021-04-02T13:43:08ZengKeAi Communications Co., Ltd.Journal of Magnesium and Alloys2213-95672020-06-0182493498Interplay between cold densification and malic acid addition (C4H6O5) for the fabrication of near-isotropic MgB2 conductors for magnet applicationMd. Shahriar A. Hossain0Carmine Senatore1Yusuke Yamauchi2Mislav Mustapić3Daniel Gajda4Dipak Patel5Aslam Khan6Jung Ho Kim7Andrzej J Morawski8René Flukiger9School of Mechanical and Mining Engineering, The University of Queensland, Brisbane, QLD 4072, AustraliaDepartment of Quantum Matter Physics (DQMP), University of Geneva, Geneva, SwitzerlandKey Laboratory of Eco-chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China; School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, QLD 4072, Australia; International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, JapanUniversity of Osijek, Department of Physics, 31000 Osijek, Croatia; Corresponding author.Institute of Low Temperature and Structure Research PAS, Okólna 2, 50-422 Wroclaw, PolandResearch Center for Functional Materials, National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, JapanKing Abdullah Institute for Nanotechnology, King Saud University, Riyadh, 11451, Saudi ArabiaAustralian Institute for Innovative Materials (AIIM), University of Wollongong, Squires Way, North Wollongong, NSW 2500, AustraliaInstitute of High Pressure Physics, Polish Academy of Sciences (PAS), Sokołowska 29/37, 01-142 Warsaw, PolandDepartment of Quantum Matter Physics (DQMP), University of Geneva, Geneva, SwitzerlandThe effect of cold high pressure densification (CHPD) on anisotropy of the critical current density (Jc) in « in situ » single core binary and alloyed MgB2 tapes has been determined as a function of temperatures at 4.2 K, 20 K and 25 K as well as at applied magnetic fields up to 19 T. The study includes binary and C4H6O5 (malic acid) doped MgB2 tapes before and after CHPD. It is remarkable that the CHPD process not only improved the Jc values, in particular at the higher magnetic fields, but also decreased the anisotropy ratio, Γ = Jc///Jc┴. In binary MgB2 tapes, the anisotropy factor Γ increases with higher aspect ratios, even after applying CHPD. In malic acid (C4H6O5) doped tapes, however, the application of CHPD leads only to small enhancements of Γ, even for higher aspect ratios. This is attributed to the higher carbon content in the MgB2 filaments, which in turn is a consequence of the reduced chemical reaction path in the densified filaments. At all applied field values, it was found that CHPD processed C4H6O5 doped tapes exhibit an almost isotropic behavior. This constitutes an advantage in view of industrial magnet applications using wires with square or slightly rectangular configuration.http://www.sciencedirect.com/science/article/pii/S2213956720300438Magnesium diborideCold high pressure densificationAnisotropyTapesCritical current density |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Md. Shahriar A. Hossain Carmine Senatore Yusuke Yamauchi Mislav Mustapić Daniel Gajda Dipak Patel Aslam Khan Jung Ho Kim Andrzej J Morawski René Flukiger |
spellingShingle |
Md. Shahriar A. Hossain Carmine Senatore Yusuke Yamauchi Mislav Mustapić Daniel Gajda Dipak Patel Aslam Khan Jung Ho Kim Andrzej J Morawski René Flukiger Interplay between cold densification and malic acid addition (C4H6O5) for the fabrication of near-isotropic MgB2 conductors for magnet application Journal of Magnesium and Alloys Magnesium diboride Cold high pressure densification Anisotropy Tapes Critical current density |
author_facet |
Md. Shahriar A. Hossain Carmine Senatore Yusuke Yamauchi Mislav Mustapić Daniel Gajda Dipak Patel Aslam Khan Jung Ho Kim Andrzej J Morawski René Flukiger |
author_sort |
Md. Shahriar A. Hossain |
title |
Interplay between cold densification and malic acid addition (C4H6O5) for the fabrication of near-isotropic MgB2 conductors for magnet application |
title_short |
Interplay between cold densification and malic acid addition (C4H6O5) for the fabrication of near-isotropic MgB2 conductors for magnet application |
title_full |
Interplay between cold densification and malic acid addition (C4H6O5) for the fabrication of near-isotropic MgB2 conductors for magnet application |
title_fullStr |
Interplay between cold densification and malic acid addition (C4H6O5) for the fabrication of near-isotropic MgB2 conductors for magnet application |
title_full_unstemmed |
Interplay between cold densification and malic acid addition (C4H6O5) for the fabrication of near-isotropic MgB2 conductors for magnet application |
title_sort |
interplay between cold densification and malic acid addition (c4h6o5) for the fabrication of near-isotropic mgb2 conductors for magnet application |
publisher |
KeAi Communications Co., Ltd. |
series |
Journal of Magnesium and Alloys |
issn |
2213-9567 |
publishDate |
2020-06-01 |
description |
The effect of cold high pressure densification (CHPD) on anisotropy of the critical current density (Jc) in « in situ » single core binary and alloyed MgB2 tapes has been determined as a function of temperatures at 4.2 K, 20 K and 25 K as well as at applied magnetic fields up to 19 T. The study includes binary and C4H6O5 (malic acid) doped MgB2 tapes before and after CHPD. It is remarkable that the CHPD process not only improved the Jc values, in particular at the higher magnetic fields, but also decreased the anisotropy ratio, Γ = Jc///Jc┴. In binary MgB2 tapes, the anisotropy factor Γ increases with higher aspect ratios, even after applying CHPD. In malic acid (C4H6O5) doped tapes, however, the application of CHPD leads only to small enhancements of Γ, even for higher aspect ratios. This is attributed to the higher carbon content in the MgB2 filaments, which in turn is a consequence of the reduced chemical reaction path in the densified filaments. At all applied field values, it was found that CHPD processed C4H6O5 doped tapes exhibit an almost isotropic behavior. This constitutes an advantage in view of industrial magnet applications using wires with square or slightly rectangular configuration. |
topic |
Magnesium diboride Cold high pressure densification Anisotropy Tapes Critical current density |
url |
http://www.sciencedirect.com/science/article/pii/S2213956720300438 |
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