Abstract
Transport critical current ( I c) was measured as a function of magnetic field ( H) at 77 K, for Bi-2223/Ag tapes which were progressively bent. The field was perpendicular to the tape plane. Proportion of critical current through strong links in total I c ( I c0 s/ I c0) was used as a measure of grain connectivity by strong links. It was found that I c0 s/ I c0 changes with bending, going through a peak as the tapes progressively bend. A change of flux pinning with bending was also observed. However, the effect of the change of flux pinning on I c0 s/ I c0 was only a minor one. Therefore, change of I c0 s/ I c0 with bending is defined by grain connectivity and it reflects qualitatively different electromagnetic and mechanical properties of weak and strong links. This is in agreement with previous studies of electromagnetic properties and formation of weak and strong links.
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