Multifilamentary, in-situ Route, Cu-stabilized MgB2 Strands

Abstract

Transport critical current densities and n-values were measured at 4.2 K in fields up to 15 T on 7, 19, and 37-stack multifilamentary MgB2 strands made using an in-situ route. Some strands included SiC additions (particle size 30 nm), while in others Mg-rich compositions were used. Two basic multifilamentary variants were measured, the first had Nb filamentary barriers, the second had Fe filamentary barriers. All samples incorporated stabilizer in the form of Cu 101. Simple, one-step heat treatments were used, with temperatures ranging from 700-800C, and times from 10-30 minutes. Transport critical current densities of 1.75 x 105 A/cm2 were seen at 4.2 K and 5 T in 37 stack strands.

arXiv comment10 pages, 3 figs, 2 tables

References in corpus (6)

• High transport critical current density obtained for Powder-In-Tube-processed MgB2 tapes and wires using stainless steel and Cu-Ni tubes
• High transport critical current density above 30 K in pure Fe-clad MgB2 tape
• Improvement of critical current density in Fe-sheathed MgB2 tapes by ZrSi2, ZrB2 and WSi2 doping
• Fabrication and transport critical currents of multifilamentary MgB2/Fe wires and tapes
• Transport and magnetic Jc of MgB2 strands and small helical coils
• MgB2 conductors for dc and ac applications

Cited by in corpus (4)

• Fabrication of high performance MgB2 wires by an internal Mg diffusion process
• Solenoidal Coils Made from Monofilamentary and Multifilamentary MgB2 strands
• Atmospheric conditions and their effect on ball-milled magnesium diboride
• Influence of Strand Design, Boron Type, and Carbon Doping Method on the Transport Properties of Powder-in-Tube MgB2-XCX Strands