Contact resistance characteristics of YBaCuO superconductors with deposited metal layer

Hiroyuki Fujita, Katsuya Fukuda, Koichiro Sawa, Masaru Tomita, Masato Murakami, Naomichi Sakai, Izumi Hirabayashi

研究成果: Conference contribution

1 被引用数 (Scopus)

抄録

A persistent current switch (PCS) is used for superconducting applications, such as superconducting magnetic energy storage (SMES) system. The authors have proposed a mechanical switch of Y-Ba-Cu-O (YBCO) bulk as a mechanical PCS. From the previous study, it turned out that there were improvements of reducing contact resistance and load in the YBCO switch. The sample surfaces were carefully polished and deposited with silver in order to reduce the contact resistance. As a result, the transport current exceeded 50A, and the contact resistance reduced to 0.64μΩ with applying constant load of 500N. The resistance was reduced by increasing the thickness of the deposited metal layers, but it saturated when the thickness reached a certain level. In this paper, the authors measured the contact resistance of Ag block with convex curvature and Ag, YBCO sample, and Agdeposited YBCO sample (dAg/YBCO) to clarify the main source of the resistance. The study was performed with the development of a PCS in mind. The contact resistance was the largest in the Ag/YBCO contact. It was lowered with increasing the thickness of deposited-Ag layer for the Ag/dAg/YBCO contact. However, the smallest resistance of Ag/dAg/YBCO was even larger than that of the Ag/Ag contact. This is probably due to the fact that Ag/dAg/YBCO contact has two interfaces. The present result suggests that the contact area is dominant in controlling the contact resistance. Simulation study of the contact area with a finite element method (FEM) also supported this idea.

本文言語English
ホスト出版物のタイトル23rd International Conference on Electrical Contacts, ICEC 2006 - together with the 6th International Session on Electromechanical Devices, IS-EMD 2006
ページ390-395
ページ数6
出版ステータスPublished - 2006 12 1
イベント23rd International Conference on Electrical Contacts, ICEC 2006 - Sendai, Japan
継続期間: 2006 6 62006 6 9

出版物シリーズ

名前23rd International Conference on Electrical Contacts, ICEC 2006 - together with the 6th International Session on Electromechanical Devices, IS-EMD 2006

Conference

Conference23rd International Conference on Electrical Contacts, ICEC 2006
国/地域Japan
CitySendai
Period06/6/606/6/9

ASJC Scopus subject areas

  • 電子工学および電気工学
  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

フィンガープリント

「Contact resistance characteristics of YBaCuO superconductors with deposited metal layer」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル