Bending Strain Characteristics of Critical Current in Double-Layered Bi-2223 Superconducting Tapes

Author

Shin, Hyung-Seop ; Dizon, John R C ; Bonifacio, Rolly ; Park, Sung-Taek ; Ha, Dong-Woo ; Oh, Sang-Soo

Author_Institution

Sch. of Mech. Eng., Andong Nat. Univ., Andong

Volume

18

Issue

2

fYear

2008

fDate

6/1/2008 12:00:00 AM

Firstpage

1155

Lastpage

1158

Abstract

The evaluation of reliability of HTS tapes is necessary for practical applications such as magnet, power cables, motors, SMES and HTS coils. The bending strain effect on the critical current, I_c, in multifilamentary Bi-2223 HTS tapes have been investigated. Single and double layered tapes (for high current capacity) were subjected to thermal and pressurization cycles at pressurized liquid nitrogen (LN₂) up to 1 MPa. After the pressurization test, the subsequent occurrence of damage like ballooning due to the diffusion and expansion of LN₂ into the tapes were investigated and compared. The Bi-2223 tapes showed different I_c degradation behavior depending upon the geometry and ratio of reinforcement to superconductor adopted.

Keywords

bending; bismuth compounds; calcium compounds; critical currents; high-temperature superconductors; lead compounds; multifilamentary superconductors; strontium compounds; superconducting tapes; Bi_2-xPb_xSr₂Ca₂Cu₃O₁₀; bending strain characteristics; bending strain effect; critical current; pressurization cycles; pressurized liquid nitrogen; superconducting tapes; thermal cycles; Bending strain; Bi-2223 tapes; critical current; double-layered; pressurized $hbox{LN}_{2}$; thermal cycle;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2008.921276

Filename

4520256