Transport and structural properties of MgB2/Fe wires produced by redesigning internal Mg diffusion process. (1st April 2022)

• Record Type: Journal Article
• Authors: Yetiş, Hakan; Avcı, Doğan; Karaboğa, Fırat; Aksoy, Canan; Gajda, Daniel; Martínez, Elena; Tanyıldızı, Fatih Mehmet; Zaleski, Andrzej; Babij, Michal; Tran, Lan Maria; Angurel, Luis Alberto; de la Fuente, G F; Belenli, İbrahim
• Is Part Of: Superconductor science & technology. Volume 35:Number 4(2022)
• Publication Date: 2022-04-01
• Subjects: MgB2 wire -- IMD -- PIT -- boron; Superconductivity -- Periodicals; Superconductors -- Periodicals; 537.623
• DOI: 10.1088/1361-6668/ac5339
• Languages: English
• ISSNs: 0953-2048

Abstract

Abstract: We report transport, electromechanical, and structural properties of single core MgB2 /Fe wire produced using a new fabrication method, called designed internal Mg diffusion (IMD) process, which relies on the use of non-stoichiometric Mg + B pellets with excess Mg in place of a central Mg rod used in the standard IMD method. Structural analysis revealed the successful formation of a porous MgB2 structure in the center and a dense circular MgB2 layer surrounding this structure in the designed-IMD wire. Fast transport I – V measurements showed that the designed IMD method increased engineering critical current density ( J e ) up to twice that of the IMD wires in self-field. The central porous MgB2 structure shared the applied current and indirectly behaved as an internal stabilizer against quench damage at high applied currents.