NDLI: $MgB_{2}$ wire diameter reduction by hot isostatic pressing—a route for enhanced critical current density

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$MgB_{2}$ wire diameter reduction by hot isostatic pressing—a route for enhanced critical current density

Content Provider	Scilit
Author	Morawski, Andrzej Cetner, Tomasz Gajda, Daniel Zaleski, Andrzej Janusz Häßler, W. Nenkov, Konstantin Rindfleisch, Matthew A. Tomsic, Mike J. Przyslupski, Piotr
Copyright Year	2018
Description	Journal: Superconductor Science and Technology Effect of wire diameter reduction on the critical current density of pristine MgB2 wire was studied. Wires were treated by HIP (Hot Isostatic Pressing) method at 570oC temperature and pressures up to 1.1 GPa. It was found that the wire diameter reduction induces an increase of the mass density of the superconducting cores by up to 70%. This feature leads to the increase of critical current, critical current density and pinning force density. The magnitude and field dependence of the critical current density are related with both grain connectivity and structural defects, which acts as effective pinning centers. High field transport properties were obtained without doping of the MgB2 phase. Critical current density jc of 3500 A/mm2 was reached at 4 K, 6 T for the best sample, which was a five–fold increase compared to MgB2 samples synthesized at ambient pressure.
Related Links	http://iopscience.iop.org/article/10.1088/1361-6668/aac55a/pdf
ISSN	09532048
e-ISSN	13616668
DOI	10.1088/1361-6668/aac55a
Journal	Superconductor Science and Technology
Issue Number	7
Volume Number	31
Language	English
Publisher	IOP Publishing
Publisher Date	2018-05-16
Access Restriction	Open
Subject Keyword	Journal: Superconductor Science and Technology Metallurgy and Metallurgical Engineering Critical Current Density
Content Type	Text
Resource Type	Article
Subject	Ceramics and Composites Materials Chemistry Metals and Alloys Condensed Matter Physics Electrical and Electronic Engineering

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