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Evaluation of current transfer in Bi-2223/Ag composite tapes

✍ Scribed by Carlos Y. Shigue; Carlos A. Baldan; Ernesto Ruppert Filho

Publisher
Elsevier Science
Year
2004
Tongue
English
Weight
249 KB
Volume
408-410
Category
Article
ISSN
0921-4534

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✦ Synopsis

The evaluation of current transfer effects in normal metal/superconductor interfaces are used in the design of splices and joints of superconducting coils. We evaluated the low electric resistance by applying transport currents up to 100 A and under self magnetic fields using the resistive four probe method as well as the induced persistent current decay method. In the four probe method the resistance was measured at many voltage taps aiming to determine the currenttransfer length and the influence sample inhomogeneity. The 155-mm long lap joint resistance of the Bi-2223/Ag tape measured by the induced current decay method 1.1 β€’ 10 Γ€8 X agrees well with that measured by the four probe method and a 1-m long specimen exhibited inhomogeneity in the I-V curve for different spaced voltage taps.

πŸ“œ SIMILAR VOLUMES

Effect of current sweep rate on critical
Effect of current sweep rate on critical current of superconducting Ag-Bi-2223 tapes
✍ S.Y. Ding; C. Ren; X.X. Yao; Y. Sun; H. Zhang πŸ“‚ Article πŸ“… 1998 πŸ› Elsevier Science 🌐 English βš– 130 KB

The effect of sweep rate of applied current (dI/dt) on critical current (I c ) of Ag-sheathed Bi 2 Pb x Sr 2-x Ca 2 Cu 3 O y (Ag-Bi-2223) tapes was studied by the four-probe measurement method of V-I curves. It was found that the V-I curves were affected apparently by dI/dt, resulting I c , decrease