Direct evidence of the high strain tolerance of the critical current of DI-BSCCO tapes fabricated by means of the pretensioned lamination technique

• Published in: Superconductor science & technology Vol. 26; no. 4; pp. 45012 - 5
• Main Authors: Osamura, Kozo, Machiya, Shutaro, Ochiai, Shojiro, Osabe, Goro, Yamazaki, Kohei, Fujikami, Jun
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 01.04.2013; Institute of Physics
• Subjects: Applied sciences; BISMUTH OXIDE; Electrical engineering. Electrical power engineering; Exact sciences and technology; FABRICATION; Filaments; Fracture mechanics; Materials; MECHANICAL PROPERTIES; Origins; PROPERTIES; STRAIN; Superconducting tapes; SUPERCONDUCTORS; Synchrotron radiation; TAPE; Thermal strain; Tolerances; Thermal stress; High performance; High strain; Rupture; Mechanical properties; Bismuth Calcium Copper Strontium Oxides Mixed; Thread; Relaxation; Tensile stress; Critical current; Superconducting tapes; Magnetic sheet; Synchrotron radiation; High temperature superconductor
• ISSN: 0953-2048; 1361-6668
• DOI: 10.1088/0953-2048/26/4/045012

A remarkable improvement in the strain dependence of critical current and the mechanical properties of DI-BSCCO-Bi2223 tapes was achieved by means of the pretensioned lamination technique. In order to elucidate the origin of this high performance, the local strain exerted on BSCCO filaments was investigated by means of the synchrotron radiation technique. The relaxation strain Ar was expressed by the sum of thermal strain and tensile strain in the fracture of BSCCO filaments. It was concluded that the central parameter when considering the improvement of strain induced properties is the force free strain exerted on BSCCO filaments together with their own strength.