Microstructures of superconducting joint between GdBa2Cu3Oy-coated conductors via additionally deposited precursor films
Microstructures of superconducting joint between GdBa2Cu3Oy-coated conductors via additionally deposited precursor films
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DOI：
10.7567/1347-4065/ab0f23
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发表时间：
2019-04
影响因子：
1.5
通讯作者：
T. Miyajima;R. Teranishi;Syotaro Yasuyama;Y. Sato;K. Kaneko;T. Maeda;Minoru Ochi;K. Hiramatsu;M. Nakamura;V. Petrykin;Sergey B. Lee;T. Okada;S. Awaji
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文献类型：
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作者：
T. Miyajima;R. Teranishi;Syotaro Yasuyama;Y. Sato;K. Kaneko;T. Maeda;Minoru Ochi;K. Hiramatsu;M. Nakamura;V. Petrykin;Sergey B. Lee;T. Okada;S. Awaji
超导接头已被要求延长REBa2Cu3Oy涂覆的导体用于电力应用。在这项研究中，我们提出了一种新的连接方法GdBa2Cu3Oy涂层导体通过结晶前体膜额外沉积在导体上。将两个具有前体膜的GdBa2Cu3Oy涂覆的导体以面对面的方式放置在炉中，然后在机械压力下使它们结晶以接合它们。获得了临界温度高达90.8K的超导接头。通过透射电子显微镜的显微组织观察显示，在接合边界处仅存在少量孔隙，没有具有c轴取向的GdBa2Cu3Oy的第二相。
Superconducting joints have been demanded to lengthen REBa2Cu3Oy-coated conductors for electrical power applications. In this study, we propose a new joint method for GdBa2Cu3Oy-coated conductors via crystallizing precursor films additionally deposited on the conductors. Two GdBa2Cu3Oy-coated conductors with precursor films were placed in a face-to-face manner in a furnace, then they were crystallized under mechanical pressure to joint them. A superconducting joint was achieved with a high critical temperature of 90.8 K. Microstructural observation by a transmission electron microscope revealed that there were only a few pores at the joint boundary without a secondary phase having c-axis-oriented GdBa2Cu3Oy.