Title :
The influence of processing conditions on the structure and critical properties of Bi-2223 composite tapes
Author :
Shikov, A.K. ; Gusakov, D.B. ; Rakov, D.N. ; Vargin, V.A. ; Akimov, I.I. ; Kotova, E.V. ; Medvedev, M.I. ; Kruglov, V.S.
Author_Institution :
SSC All-Russia Sci. & Res. Inst. of Inorg. Mater., Moscow, Russia
fDate :
6/1/2005 12:00:00 AM
Abstract :
SEM, XRD-data, and critical properties are presented which concern to Bi-2223 composite tapes processed under various conditions. The multifilamentary tapes were made by the PIT procedure with using of extrusion and/or drawing and tape rolling. Initial properties of powder precursors, filling factor, tape rolling, and heat treatment conditions as well as O2-content in working atmosphere were varied. The achieved critical properties are described and analyzed. In particular, on basis of XRD-data significant differences in Bi-2223 grains substructure for tapes having different levels of critical current have been revealed.
Keywords :
X-ray diffraction; bismuth compounds; calcium compounds; critical currents; heat treatment; high-temperature superconductors; lead compounds; multifilamentary superconductors; powders; rolling; scanning electron microscopy; strontium compounds; superconducting tapes; 77 K; 86 A; Bi-2223 composite tapes; Bi-2223 critical properties; Bi2PbSr2Ca2Cu3O10; PIT procedure; SEM data; XRD data; critical currents; filling factor; grain substructure; heat treatment conditions; multifilamentary tapes; powder precursors; processing conditions; tape rolling; Atmosphere; Conducting materials; Conductors; Critical current; Filling; Heat treatment; High temperature superconductors; Microstructure; Powders; Silver; Bi-2223 tapes; critical currents; structure;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2005.847481
