Paper Title:
The Effect of Deformation Stress-Strain and Temperature on The Ic Degradation of Bi-2223/Ag Tapes
  Abstract

Bi-2223/Ag tapes are usually used for superconducting power cables and magnets. Bi- 2223 ceramic superconducting core can be damaged under complicated stress and strain conditions such as winding tension, bending and twisting. In this study, we have presented the effect of axial stress and bending strain on the superconducting properties of Bi-2223/Ag tapes. In order to establish the value for 95% retained Ic of the Bi-2223/Ag tapes under various stress-strain conditions, the tension apparatus with bending former was used to apply the tension and bending stress-strain. Tension and bending stress-strain simultaneously applied to the tapes could reduce the critical current even though each applied stress and strain values were not higher than that of 95% retained Ic of the tapes. Complex stress-strain conditions including the thermal stress-strain have accelerated the degradation of the Bi-223/Ag tapes. The deformation temperature was important to maintain the 95% retained Ic of the Bi-2223/Ag tapes after bending or tension deformation because mechanical strength of the tapes can be changed drastically between room temperature and 77 K.

  Info
Periodical
Materials Science Forum (Volumes 534-536)
Edited by
Duk Yong Yoon, Suk-Joong L. Kang, Kwang Yong Eun and Yong-Seog Kim
Pages
1609-1612
DOI
10.4028/www.scientific.net/MSF.534-536.1609
Citation
H. S. Ha, S. C. Kim, D. W. Ha, S. S. Oh, J. H. Joo, "The Effect of Deformation Stress-Strain and Temperature on The Ic Degradation of Bi-2223/Ag Tapes", Materials Science Forum, Vols. 534-536, pp. 1609-1612, 2007
Online since
January 2007
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$32.00
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