High performance new MgB2 superconducting hollow wires

Abstract

MgB2 hollow wires have been produced with a new technique which uses a conventional wire manufacturing process but is applied to composite billets containing the elemental B and Mg precursors in an appropriate shape. The technique has been applied to the manufacture of both monofilamentary and multifilamentary wires of several tens meters length. The superconducting transport properties of the MgB2 hollow wires have been measured in magnetic field and in the temperature range from 4.2 to 30 K. Promising results are obtained, which indicate the possibility of application of these wires as superconductors in the temperature range of 15-30 K and at medium-high values of magnetic field.

14 Pages, 10 Figures, Paper presented at BOROMAG, Genova 17-19 June 2002 and submitted to Supercond. Sci. Technol

References in corpus (7)

• Large transport critical currents in unsintered MgB2 superconducting tapes
• Large transport critical currents in dense Fe- and Ni-clad MgB2 superconducting tapes
• High transport critical current density obtained for Powder-In-Tube-processed MgB2 tapes and wires using stainless steel and Cu-Ni tubes
• High transport currents in mechanically reinforced MgB2 wires
• Very fast formation of superconducting MgB2/Fe wires with high Jc
• Josephson effect in MgB_2 break junctions
• Critical state analysis in MgB2 bulk by means of quantitative MO technique

Cited by in corpus (6)

• Hot isostatic pressing of powder in tube MgB2 wires
• Fabrication of high performance MgB2 wires by an internal Mg diffusion process
• The critical current density of advanced internal-Mg-diffusion-processed MgB2 wires
• Drawing induced texture and the evolution of superconductive properties with heat treatment time in powder-in-tube in-situ processed MgB2 strands
• Enhanced higher temperature (20-30 K) transport properties and irreversibility field in nano-Dy2O3 doped advanced internal Mg infiltration processed MgB2 composites
• Application prospects of MgB${}_2$ in view of its basic properties