Defects are frequently introduced during the fabrication process of long-length coated conductors and typically have a critical current (I_c) that is lower than the average I_c of the conductor. If the I_c of a defective area can be increased to a value similar to the average conductor I_c, the applicability of long-length high-T_c superconducting (HTS) tape with defects can be improved. We have proposed a method for effectively repairing locally defective or damaged HTS tape using a superconducting (SC) patch, which was prepared by separating the metal substrate from the HTS coated conductor by interface delamination. The SC patch has high engineering critical current density with a simple structure of stabilizing layer / superconducting layer / stabilizing layer. Attaching a SC patch repairs local defects in a conductor by enabling the defective area to exhibit a comparatively higher I_c. The average I_c value of the defect-free HTS tape was about 160 A, while the I_c value of HTS tape including defective areas was about 105 A, but was increased to a level of 150 A when SC patches were applied. It was found that, by applying SC patches on the defective area in a conductor, the overall I_c of the conductor can reach at least 90% of the I_c value produced by a defect-free conductor. Further, no damage was found when the HTS tapes with SC patches were wound on a bobbin with a diameter of at least 50 mm.

缺陷通常在长涂层导体的制造过程中引入，并且通常具有的临界电流（I _c）低于导体的平均I _c。如果缺陷区域的I _c可以增加到类似于平均导体I _c的值，则长高T _c的适用性具有缺陷的超导（HTS）胶带可以得到改善。我们提出了一种使用超导（SC）贴片有效修复局部有缺陷或损坏的HTS胶带的方法，该贴剂是通过界面分层将金属基板与HTS涂层导体分开而制成的。SC贴片具有较高的工程临界电流密度，具有稳定层/超导层/稳定层的简单结构。附着SC贴片可通过使缺陷区域表现出相对较高的I _c来修复导体中的局部缺陷。无缺陷的HTS胶带的平均I _c值约为160 A，而I _c包含缺陷区域的HTS胶带的热阻值约为105 A，但当应用SC贴片时，其值增加到150A。已经发现，通过在导体的缺陷区域上施加SC贴片，导体的总I _c可以达到由无缺陷导体产生的I _c值的至少90％。此外，当将具有SC贴片的HTS带缠绕在直径至少为50mm的线轴上时，没有发现损坏。