[14p-D63-11~21] 11.3 Critical Current, Superconducting Power Applications

[14p-D63-17] [INVITED]Microstructure and critical currents of PIT MgB₂ wires cold worked with swaging

〇Hiroaki Kumakura^1,2, Yusuke Saito^1,2, Masato Murakami² (1.NIMS, 2.Shibaura Inst.)

Keywords:superconducting wire, MgB2

It is considered that the microstructure of Mg/B powder mixtures in PIT processed wires depends on the mechanical deformation process. We fabricated Fe-sheathed mono-filamentary PIT MgB₂ wires by applying several cold mechanical working such as groove rolling, drawing and rotary swaging. We found that a wire fabrication by applying a swaging machine is much effective in obtaining well developed fiber structure of Mg particles and high density MgB₂ core. These microstructures much enhance Jc values.