Title :
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
fDate :
6/1/2008 12:00:00 AM
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, Ic, 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 Ic 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; Bi2-xPbxSr2Ca2Cu3O10; 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;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2008.921276
