AC Transport Current Loss Characteristics of YBCO Coated Conductors Subjected to Bending Strains

Dependence of AC transport current losses on bending strains of two kinds of YBCO coated conductors (CCs) manufactured by IBAD/MOCVD and IBAD/PLD processes were investigated. The bending strains were applied to CCs samples by mounting the samples on U-shape sample holders consisted of straight and half-cylindrical sections. The bending strains to the superconductor layer were in tensile and compressive directions. The experimental results showed that the bending dependence of the AC transport current loss could be characterized by the amount of the deteriorations of the conductor critical currents dependent on structure changes of the superconductor layers due to the bending strains, regardless of the CCs manufacturing processes and the directions of the strains.