Fabrication and characterization of microstructural evolution and properties of twisted Bi(Pb)-Sr-Ca-Cu-O superconductor tape

Jun Hyung Lim, Jinho Joo, Jung Gu Kim, Wansoo Nah, Mihye Jang, Taekuk Ko, Sang Jin Lee, Hong Soo Ha, Sang Soo Oh, Young Kil Kwon

Research output: Contribution to journalConference article

1 Citation (Scopus)

Abstract

We fabricated 37 multi-filament Bi-2223 (BSCCO) superconductor tapes and evaluated the effect of twisting on the microstructural evolution such as grain size, grain alignment, and interface morphology, and on the resulting critical current. Twist pitches of the BSCCO tapes are in the range of 70 to 8 mm and uniformly deformed. It was observed that the grain size and the degree of texture decreased with decreasing pitch, probably due to the formation of the irregular interface between the Ag and the filaments. In addition, the critical current of the tapes decreased with decreasing pitch. For the tape having a twist pitch of 8 mm, approximately 50% of the critical current was maintained compared to that of the untwisted tape. The reduction of critical current may be related to the interface irregularity, smaller grain size, poorer texture and presence of cracks due to the induced strain during the twisting processing.

Original languageEnglish
Pages (from-to)2796-2799
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Volume11
Issue number1 III
DOIs
Publication statusPublished - 2001 Mar
Event2000 Applied Superconductivity Conference - Virginia Beach, VA, United States
Duration: 2000 Sep 172000 Sep 22

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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