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Glowacki_2014_Electromagnetically.pdf (1.66 MB)

Electromagnetically assisted densification of copper-sheathed in situ MgB2/Cu wires

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journal contribution
posted on 2018-10-23, 15:06 authored by Marcin Woźniak, Bartek A. Glowacki
This paper summarizes recent methods of improving critical current density of in situ Cu-sheathed MgB2 wires. These methods include using optimum heat treatment schedule, adding copper powder to the wire core and electromagnetic densification of wire core. The large part of work reported here focuses on the latter method applied to the relatively low-density MgB2/Cu wire core. The packing density of unreacted, monofilament wire core was increased by 8 % with oscillating magnetic pressure, reaching a peak value above 700 MPa as calculated by finite element modelling of the forming process. The higher density of the MgB2 core combined with copper powder addition resulted in a critical current density increase of more than fivefold in comparison to purely stoichiometric and cold-drawn-only wire.

History

Publication

Journal of Superconductivity and Novel Magnetism;28 (2), pp. 419-423

Publisher

Springer

Note

peer-reviewed

Language

English

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