The influence of hard bending strain on the properties of Bi-2223/Ag HTS tapes

KERI, Andong National Univ.^A

@Sang-Soo Oh,Hong-Soo Ha, Dong-Woo Ha, Kyu-Jeong Song, Chan Park, Young-Kil Kwon,Kang-Sik Ryu, Hyung-Seop Shin^A

　 Even if brittle Bi-2223 Superconducting filaments are embedded in the reinforced Ag alloy sheath, their transport properties are degraded by increasing the axial and bending strain. Axial and hard bending strain properties of HTS tapes at room temperature and cryogen are more important to make superconducting magnet, cable and etc. using Bi-2223/Ag HTS tapes. 37 filamentary Bi-2223/Ag alloy HTS tapes have been fabricated by the PIT process and the superconducting properties were measured as function of bending strain at 77 K, 4.2 K. The critical current of Bi-2223/Ag tapes were decreased slightly up to 0.3 - 0.4 % applied axial strain but, drastically decreased more than these critical strains.