Superconducting Joining Concept for Internal Magnesium Diffusion-Processed Magnesium Diboride Wires
Superconducting Joining Concept for Internal Magnesium Diffusion-Processed Magnesium Diboride Wires
复制标题
内部镁扩散处理二硼化镁线材的超导连接概念
DOI：
10.1021/acsami.0c17385
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发表时间：
2021
影响因子：
9.5
通讯作者：
Kim Jung Ho
中科院分区：
文献类型：
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作者：
Patel Dipak;Matsumoto Akiyoshi;Kumakura Hiroaki;Moronaga Taku;Hara Yuka;Hara Toru;Maeda Minoru;Hossain Md. Shahriar A.;Yamauchi Yusuke;Choi Seyong;Kim Jung Ho
利用镁扩散到超导接头内硼层的现象，制备了未反应单丝内扩散处理二硼化镁（MgB2）丝超导接头。在20k的2 - 7t磁场中，与裸线相比，该接头能够携带几乎相同的传输电流，这是前所未有的。在20 K自场中，接头电阻也很低，仅为2.01 × 10-13Ω。在商业上可用的超导体中，这项工作是第一个成功实现超导接头的，该接头能够在强磁场下将电流从一个导体传递到另一个导体而不会有明显的退化。这项工作显示了将mgb2应用于一系列实际应用的巨大潜力，其中超导接头是必不可少的。
A superconducting joint of unreacted monofilament internal magnesium diffusion-processed magnesium diboride (MgB2) wires was fabricated by exploiting the phenomenon of magnesium diffusion into the boron layer inside the superconducting joint. Unprecedentedly, the joint was able to carry an almost identical transport current compared to the bare wire in a 2–7 T magnetic field at 20 K. The joint also exhibited very low joint resistance of 2.01 × 10–13Ω in self-field at 20 K. Among commercially available superconductors, this work is the first to successfully realize a superconducting joint that is capable of transferring current from one conductor to another without any notable degradation under strong magnetic fields. This work demonstrates great potential to apply MgB2in a range of practical applications, where superconducting joints are essential.