TITLE

High transport critical current density obtained for powder-in-tube-processed MgB[sub 2] tapes and wires using stainless steel and Cu–Ni tubes

AUTHOR(S)
Kumakura, H.; Matsumoto, A.; Fujii, H.; Togano, K.
PUB. DATE
October 2001
SOURCE
Applied Physics Letters;10/8/2001, Vol. 79 Issue 15, p2435
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
MgB[sub 2] tapes and wires were fabricated by the powder-in-tube method. Stainless steel and Cu–Ni tubes were used as sheath materials, and no heat treatment was applied. The tapes made of stainless steel showed transport critical current density J[sub c] of about 10 000 A/cm2 at 4.2 K and 5 T. A high J[sub c] of about 300 000 A/cm2 was obtained by extrapolating the J[sub c]–B curves to zero field. Multifilamentary (seven-core) MgB[sub 2] wire was successfully fabricated using Cu–Ni tubes. For both tapes and wires, the grain connectivity of MgB[sub 2] was as good as a high-pressure sintered bulk sample. However, the J[sub c] of the Cu–Ni sheathed wire was lower than the stainless steel sheathed tape due to the lower packing density of MgB[sub 2]. © 2001 American Institute of Physics.
ACCESSION #
5306347

 

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