Evaluation of delamination properties of coated conductors by means of MELT method using epoxy resin

Coated conductors (CCs) are prospective for application to electric power conductors due to not only better cost performance but also high Jc–B properties compared with Bi2Sr2Ca2Cu3O10 (BSCCO) tapes. However, CCs are composed of multi-layered thin films and metal substrate, and post-treatments are essential to putting CCs to practical use, which are slitting and/or making thin film multi-filaments. For this reason, CCs delaminate between multi-layers. The delamination prevents CCs from functioning as superconducting wire, and therefore there is a need to evaluate delamination toughness of CCs quantitatively.In this study, we applied the Modified Edge Lift Test (MELT) using epoxy resin to evaluation of delamination properties. Then, we investigated delaminated surfaces by the means of scanning electron microscope.