Details

Autor(en) / Beteiligte

• Wozniak, Mariusz
• Glowacki, Bartek Andrzej

Titel

Electromagnetically Assisted Densification of Copper-Sheeted in Situ MgB2/Cu Wires

Ist Teil von

• Journal of superconductivity and novel magnetism, 2015, Vol.28 (2), p.419-423

Ort / Verlag

Boston: Springer US

Erscheinungsjahr

2015

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• This paper summarizes recent methods of improving critical current density of in situ Cu-sheathed MgB 2 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 MgB 2 /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 MgB 2 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.