Performance evaluation of high-temperature superconducting current leads for micro-SMES systems

Niemann, R. C.; Cha, Y.S.; Hull, J.R.; Buckles, W.E.; Weber, Birgit; Yang, Suntao

doi:10.1109/77.402667

Cited by 2 publications

(1 citation statement)

References 8 publications

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“…Bi-2223 bulk ceramics have been previously considered for use in current leads, such as applications in superconducting magnetic energy storage (SMES) [1][2][3] and electrical fault current limiters [4]. This is because they have good superconducting behaviour, reasonable mechanical properties at 77 K [5], resistance to environmental degradation and relatively easy workability [6].…”

Section: Introductionmentioning

confidence: 99%

The effect of pre-sintering and deformation rate on critical current density behaviour of Bi-2223 bulk samples made by sinter forging

McIntyre

Guo

et al. 2003

Supercond. Sci. Technol.

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A technique combining cold-isostatic-pressing (CIP) and sinter forging was applied to the fabrication of Bi-2223 bulks, and pre-sintering was conducted after (route 1) and before CIP (route 2). Both of them involve sinter forging twice and no post-annealing. The effect of pre-sintering and deformation rate on the critical current density J c is investigated. Such obtained Bi-2223 bulks had a cross-sectional area of ∼1 cm 2 and therefore the total critical current is close to meeting some technical applications. The J c results from route 1 are much higher than from route 2 although both reached highest J c at the deformation rate 80%. The main reason is that route 1 produces much larger, plate-like, better-contacted grains whereas by route 2 much smaller, round-shaped and poorly contacted grains were obtained.

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