Effect of ball milling on the local magnetic flux distribution and microstructure of in situ Fe/MgB2 conductors

Authors

C Laliena, University of Zaragoza
T Qureishy, University of Oslo
E Martinez, University of Zaragoza
R Navarro, University of Zaragoza
Pavlo Mikheenko, University of OsloFollow
Tom H. Johansen, University of Wollongong, University of OsloFollow
Paul M. Kovac, Slovak Academy Of SciencesFollow

RIS ID

114102

Publication Details

Laliena, C., Qureishy, T., Martinez, E., Navarro, R., Mikheenko, P., Johansen, T. H. & Kovac, P. (2017). Effect of ball milling on the local magnetic flux distribution and microstructure of in situ Fe/MgB2 conductors. Journal of Alloys and Compounds, 717 164-170.

Abstract

The effects of the precursor milling energy on the superconducting and microstructural homogeneity of Fe-sheathed MgB2 monocore wires and tapes have been investigated. The conductors were produced by the powder-in-tube method using drawing and rolling deformation methods and in situ reaction. Combined magneto-optical, structural and magnetization measurements were performed on MgB2 superconducting tapes prepared from differently milled precursors revealing hidden mechanisms controlling their critical current density. Local degradation of the superconducting properties observed in some analysed conductors has been identified and correlated with microstructural observations.