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Interplay between cold densification and malic acid addition (C4H6O5) for the fabrication of near-isotropic MgB2 conductors for magnet application

引用

Journal of Magnesium and Alloys 2020年第2期8卷 493-498页

作者： Md.Shahriar A.Hossain Carmine Senatore Yusuke Yamauchi mislav mustapic Daniel Gajda Dipak Patel Aslam Khan Jung Ho Kim Andrzej J Morawski Rene Flukiger School of Mechanical and Mining Engineering The University of QueenslandBrisbaneQLD 4072Australia Department of Quantum Matter Physics(DQMP) University of GenevaGenevaSwitzerland Key Laboratory of Eco-chemical Engineering College of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao 266042China School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnology(AIBN) The University of QueenslandBrisbaneQLD 4072Australia International Center for Materials Nanoarchitectonics(WPI-MANA) National Institute for Materials Science(NIMS)1-1 NamikiTsukubaIbaraki 305-0044Japan University of Osjek Departiment of Physics31000OsijekCroatia Institute of Low Temperature and Structure Research PAS Okolna 250-422 WroclawPoland Research Center for Functional Materials National Institute for Materials Science(NIMS)1-2-1 SengenTsukubaIbaraki 305-0047Japan King Abdullah Institute for Nanotechnology King Saud UniversityRiyadh11451Saudi Arabia Australian Institute for Innovative Materials(AIIM) University of WollongongSquires WayNorth WollongongNSW 2500Australia Institute of High Pressure Physics Polish Academy of Sciences(PAS)Sokoiowska 29/3701-142 WarsawPoland

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 *** study includes binary and C4H6O5(malic acid)doped MgB2 tapes before and after *** 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,Г=JC^///JC^⊥In binary MgB2 tapes,the anisotropy factor F increases with higher aspect ratios,even after applying *** malic acid(C4H6O5)doped tapes,however,the application of CHPD leads only to small enhancements ofГ,even for higher aspect *** 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 *** all applied field values,it was found that CHPD processed C4H6O5 doped tapes exhibit an almost isotropic *** constitutes an advantage in view of industrial magnet applications using wires with square or slightly rectangular configuration.

关键词： Magnesium diboride Cold high pressure densification Anisotropy Tapes Critical current density

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