Trapped Fields of Hot-Pressed MgB2for Applications in Liquid Hydrogen

T. Prikhna, M. Eisterer, B. Buchner, R. Kluge, V. Sokolovsky, V. E. Moshchil, A. Bodenseher, J. Filzmoser, D. Lindackers, S. S. Ponomaryov, M. V. Karpets, F. N. Werfel, U. Flogelndelor, A. Vakaliuk, V. B. Sverdun

Research output: Contribution to journalArticlepeer-review

Abstract

The development of hydrogen energy and, in particular, high-performance submersible liquid hydrogen (LH) pumps requires superconducting bearings which can trap magnetic fields up to 1 T at 20 K. MgB2 is hence a promising candidate for this application. The superconducting properties and microstructure of differently prepared MgB2 were compared and the ability of different composite materials to trap magnetic fields was studied. Hollow cylinders of the same geometry were manufactured from hot pressed (under 30 MPa) blocks prepared from Mg:2B with Ti, TiC and Ti-O additives as well as from melt-textured YBCO ceramics. The high critical current densities and critical magnetic fields should ensure high trapped fields in all these materials. Indeed all materials demonstrated the required performance; however, flux jumps are a serious issue in MgB2 even in crack free cylinders and impeded higher trapped fields.

Original languageEnglish
Article number6801105
JournalIEEE Transactions on Applied Superconductivity
Volume33
Issue number5
DOIs
StatePublished - 1 Aug 2023

Keywords

  • Boron alloys
  • composite materials
  • pumps
  • scanning electron microscopy
  • type II superconductors
  • yttrium compounds

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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