Title :
Investigation of the initial stages of processing Bi-2223 multifilamentary tapes by analytical electron microscopy
Author :
Holesinger, Terry G. ; Ayala, Alicia ; Baurceanu, Ruxandra M. ; Maroni, Victor A.
Author_Institution :
Los Alamos Nat. Lab., NM, USA
fDate :
3/1/2001 12:00:00 AM
Abstract :
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
Keywords :
bismuth compounds; calcium compounds; high-temperature superconductors; lead compounds; multifilamentary superconductors; sintering; strontium compounds; transmission electron microscopy; 14-24 AEC; Bi-2223 multifilamentary tapes; BiPbSrCaCuO; TEM; analytical electron microscopy; compositions; induction period; lead-rich liquid phase formation; mechanism; processing; transmission electron microscopy; Charge carrier processes; Laboratories; Multifilamentary superconductors; Scanning electron microscopy; Silver; Superconducting films; Superconducting materials; Temperature; Transmission electron microscopy; US Department of Energy;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
