Conveners
M3Or3B - MgB2 and Fe-based Wires
- Matthew Rindfleisch (Hyper tech Research)
- Eric Hellstrom (Applied Superconductivity Center, National High Magnetic Field Laboratory, Florida State University)
Hyper Tech Research will report on progress towards developing magnesium diboride superconductor wires, coils and magnets for commercialization efforts, with a specific emphasis on conduction cooled MRI and AC motor/generator applications.
Critical current density (Jc) of in-situ powder-in-tube(PIT) processed MgB2 has still to be improved for practical applications. One of the problems of in-situ PIT MgB2 wires is the low mass density of MgB2 core. The density of MgB2 core of in-situ PIT wire fabricated by the conventional technique is as low as ~50%. It is considered that the microstructure of Mg/B powder cores including the...
Advanced-Internal-Magnesium-Infiltration (AIMI) MgB2 strands are typically processed with the temperature higher than Mg melting point (650 oC) and heating times of 1 ~ 4 h; therefore, the formation of dense MgB2 layer in typical AIMI strand results from liquid - solid state reaction between liquid magnesium and nano-sized boron powder. In this study, the microstructures and critical current...
In this work, exploration on upper critical field (BC2), irreversible field (Birr) properties and structural properties on MgB2 wires and bulks has been made via alumina fiber strain engineering approach and rare earth oxide (REO) addition approach. Alumina fiber was used in a series of bulk samples in MgB2 (1-x) Al2O3(x), with x being 0, 1 mol%, 3 mol%, 5 mol% and 8 mol%. Another set of MgB2...
To enable turboelectric aircraft that utilize fully superconducting motors and generators, testing of high-current, low-AC-loss superconducting wires and coils must be performed. A preliminary investigation was conducted on the critical current capability of a magnesium diboride sample and on the complications that arise from testing the sample with a cryocooler. While a cryocooler provides...
In this paper the feasibility of producing Fe(Se,Te) Coated Conductors on simple metallic templates is studied. Two routes were tested: i) Rolling-Assisted Biaxially Textured Substrate (RABiTS) and ii) unbuffered Invar 36 substrates. For route i), we started from commercially available Ni – 5 at.% W tapes which show an out-of-plane orientation of about 6° and an in-plane orientation of 5.3°; a...
Iron pnictide superconductors are very attractive for applications in the high magnetic field region, because of their large upper critical field, small anisotropy, etc. In the past few years, substantial efforts have been made to improve the transport performances of 122-type iron-based superconducting wires and tapes by ex-situ PIT technique. Recently, we have made further improvement in the...
Superconducting joints are one of the crucial components to make iron-based superconducting wires or tapes successful for future high-field application. A process for fabricating superconducting joints between Sr1-xKxFe2As2 (Sr-122) tapes is developed for the first time [1]. The diffusion bonding of the iron-based superconducting joint was achieved by hot-pressing process in Argon atmosphere....
