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 language | English |
|---|---|
| Title of host publication | Electrical Contacts, Proceedings of the Annual Holm Conference on Electrical Contacts |
| Pages | 234-239 |
| Number of pages | 6 |
| Publication status | Published - 2003 |
| Externally published | Yes |
| Event | Electrical Contacts 20003 Proceedings of the 49th IEEE Holm Conference on Electrical Contacts - Washington, DC, United States Duration: 2003 Sep 8 → 2003 Sep 10 |
Other
| Other | Electrical Contacts 20003 Proceedings of the 49th IEEE Holm Conference on Electrical Contacts |
|---|---|
| Country | United States |
| City | Washington, DC |
| Period | 03/9/8 → 03/9/10 |
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Keywords
- Contact resistance
- High-temperature superconductor
- Persistent current switch
- Transfer current
- YBCO
ASJC Scopus subject areas
- Electrical and Electronic Engineering
Cite this
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 proceeding › Conference contribution
}
TY - GEN
T1 - Contact resistance characteristics of high temperature superconducting bulk-II
AU - Yamamoto, Naoki
AU - Imaizumi, Takuya
AU - Sawa, Koichiro
AU - Tomita, Masaru
AU - Murakami, Masato
PY - 2003
Y1 - 2003
N2 - 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.
AB - 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.
KW - Contact resistance
KW - High-temperature superconductor
KW - Persistent current switch
KW - Transfer current
KW - YBCO
UR - http://www.scopus.com/inward/record.url?scp=0141974747&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0141974747&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:0141974747
SP - 234
EP - 239
BT - Electrical Contacts, Proceedings of the Annual Holm Conference on Electrical Contacts
ER -