Analysis of Critical Current Density in Bi2Sr2CaCu2O8+x Round Wire with Filament Fracture

作者：Liu, Donghui; Yong, Huadong^*; Zhou, Youhe

来源：Journal of Superconductivity and Novel Magnetism, 2016, 29(9): 2299-2309.

DOI：10.1007/s10948-016-3601-4

• Bi-2212 wire
• Filaments fracture
• Engineering current density

Bi2Sr2CaCu2O8+x (Bi-2212) round wires have outstanding electromagnetic behaviors in a high magnetic field. However, the filaments' fracture or gas bubble is difficult to avoid during the fabrication and application of Bi-2212 round wire, which would affect the critical current density seriously. In this paper, the engineering current density is studied based on Kim model for 7-bundle and 18-bundle wires with filament fracture by considering the effect of bridges between filaments. The distributions of critical current density of filaments are also investigated for different external fields. Finally, we present the relation between the number of cracked filaments and the applied strain.

• 出版日期2016-9
• 单位兰州大学