Contact resistance characteristics of high temperature superconducting bulk-II

Naoki Yamamoto, Takuya Imaizumi, Koichiro Sawa, Masaru Tomita, Masato Murakami

Research output: Chapter in Book/Report/Conference proceedingConference contribution

13 Citations (Scopus)

Abstract

We have studied the contact characteristics of two resin-impregnated Y-Ba-Cu-O (a composite of YBa 2Cu 3Oy and Y 2BaCuO 5+10wt%Ag 2O) bulk superconductors in mechanical contact. In the previous work, fundamental characteristics of mechanical contact between two YBCO bulks were studied. A switching phenomenon between high and low resistance range could be observed at a threshold current or a transfer current value in the V-I curves. In this paper we found that the transfer current exceeded 30A and the contact resistance decreased to 40 μΩ at 77K for the mechanical contact when the sample surfaces were carefully polished. Moreover we succeeded in decreasing the contact resistance to 6μΩ with depositing the metal on the contact surface. The present results suggest that a pair of YBCO blocks might be applicable to the mechanical persistent current switch for superconducting magnetic energy storage and other superconducting systems that are run in a persistent current mode.

Original languageEnglish
Title of host publicationElectrical Contacts, Proceedings of the Annual Holm Conference on Electrical Contacts
Pages234-239
Number of pages6
Publication statusPublished - 2003
Externally publishedYes
EventElectrical Contacts 20003 Proceedings of the 49th IEEE Holm Conference on Electrical Contacts - Washington, DC, United States
Duration: 2003 Sep 82003 Sep 10

Other

OtherElectrical Contacts 20003 Proceedings of the 49th IEEE Holm Conference on Electrical Contacts
CountryUnited States
CityWashington, DC
Period03/9/803/9/10

Fingerprint

Contact resistance
Energy storage
Superconducting materials
Resins
Switches
Temperature
Composite materials
Metals

Keywords

  • Contact resistance
  • High-temperature superconductor
  • Persistent current switch
  • Transfer current
  • YBCO

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Yamamoto, N., Imaizumi, T., Sawa, K., Tomita, M., & Murakami, M. (2003). Contact resistance characteristics of high temperature superconducting bulk-II. In Electrical Contacts, Proceedings of the Annual Holm Conference on Electrical Contacts (pp. 234-239)

Contact resistance characteristics of high temperature superconducting bulk-II. / Yamamoto, Naoki; Imaizumi, Takuya; Sawa, Koichiro; Tomita, Masaru; Murakami, Masato.

Electrical Contacts, Proceedings of the Annual Holm Conference on Electrical Contacts. 2003. p. 234-239.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Yamamoto, N, Imaizumi, T, Sawa, K, Tomita, M & Murakami, M 2003, Contact resistance characteristics of high temperature superconducting bulk-II. in Electrical Contacts, Proceedings of the Annual Holm Conference on Electrical Contacts. pp. 234-239, Electrical Contacts 20003 Proceedings of the 49th IEEE Holm Conference on Electrical Contacts, Washington, DC, United States, 03/9/8.
Yamamoto N, Imaizumi T, Sawa K, Tomita M, Murakami M. Contact resistance characteristics of high temperature superconducting bulk-II. In Electrical Contacts, Proceedings of the Annual Holm Conference on Electrical Contacts. 2003. p. 234-239
Yamamoto, Naoki ; Imaizumi, Takuya ; Sawa, Koichiro ; Tomita, Masaru ; Murakami, Masato. / Contact resistance characteristics of high temperature superconducting bulk-II. Electrical Contacts, Proceedings of the Annual Holm Conference on Electrical Contacts. 2003. pp. 234-239
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