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Investigation of the initial stages of processing Bi-2223 multifilamentary tapes by analytical electron microscopy

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4 Author(s)
T. G. Holesinger ; Los Alamos Nat. Lab., NM, USA ; A. Ayala ; R. M. Baurceanu ; V. A. Maroni

Analytical transmission electron microscopy (TEM) was used to probe the formation of liquid phases in multifilamentary Bi-2223 tapes. Silver was found to nucleate small amounts of liquid phase early in the processing. However, liquid formation was primarily associated with the 14-24 AEC and time at temperature (induction period) was the major factor determining the amounts of lead-rich liquid phase formation in these tapes. The compositions of the lead-rich liquid phases were measured quantitatively. The data presented is consistent with a mechanism whereby Bi-2223 can precipitate from a liquid phase

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IEEE Transactions on Applied Superconductivity  (Volume:11 ,  Issue: 1 )