Title :
Mechanical properties and their influence to transport property of multifilamentary Bi2223 tape
Author :
Osamura, Kozo ; Sugano, Michinaka ; Matsumoto, Kaname
Author_Institution :
Dept. of Mater. Sci. & Eng., Kyoto Univ., Japan
fDate :
6/1/2003 12:00:00 AM
Abstract :
In order to investigate mechano-electromagnetic property, a structure model is proposed based on the rule of mixture. A comparison with experiments made clear that the present tapes show a three stage behavior. The first elastic region (stage I´) is very narrow and followed by stage II´, where the slope of stress - elongation curve decreased gradually. Then the macroscopic yield and the plastic deformation region (stage III) appeared. A discernible degradation of critical current was observed at stages I´ and II´. This degradation is nearly reversible and vanishes when the external tensile load was reduced to zero. At stage III, the critical current decreased abruptly and largely due to generation of macroscopic cracks.
Keywords :
bismuth compounds; calcium compounds; cracks; critical currents; elongation; high-temperature superconductors; multifilamentary superconductors; plastic deformation; strontium compounds; superconducting tapes; Bi2223 multifilamentary tape; Bi2Sr2Ca2Cu3O; crack generation; critical current; high temperature superconductor; macroscopic yield; mechanical properties; mechano-electromagnetic properties; plastic deformation; rule of mixture; stress-elongation relation; structure model; transport properties; Critical current; Degradation; Mechanical factors; Microstructure; Multifilamentary superconductors; Plastics; Silver; Superconducting cables; Tensile stress; Testing;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2003.812391