Bi-2212/Ag tapes and laminates: effects of bending
A Y Ilyushechkin; T Yamashita; B Williams; I D R Mackinnon
Журнал:
Superconductor Science and Technology
Дата:
1999-03-01
Аннотация:
Superconducting Bi-2212 tapes and laminates are fabricated by a combination of dip-coating and partial melt processing. The heat treated tapes have critical current densities up to 11 kA . We investigate the degradation of critical current during bending experiments for both single tapes and tapes with laminate structure. Although degradation of is observed in both forms, the characteristics of the degradation differ. It is determined that laminated tapes perform better than single tapes when critical current is measured against bending radius, and laminated tapes tolerate a higher strain for a given reduction in critical current. It is found that increasing the number of Bi-2212 layers increases the total of the laminated tape, but degradation of critical current is more pronounced during bending because of the increased total thickness of the laminate structure. It is also found that addition of silver to the Bi-2212 layers reduces critical current degradation during bending for both tapes and laminates.
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