Joint Characteristics of YBCO Coated Conductor by Removing a Metallic Stabilizer

Author

Chang, Ki Sung ; Kim, Hyounkyu ; Dong Keun Park ; Ko, Tae Kuk ; Ahn, Min Cheol ; Ha, Don-Hyung ; Song, Jung-Bin ; Lee, Sang Jin ; Kim, Ho Min ; Lee, Haigun

Author_Institution

Electr. & Electron. Eng. Dept., Yonsei Univ., Seoul

Volume

18

Issue

2

fYear

2008

fDate

6/1/2008 12:00:00 AM

Firstpage

1220

Lastpage

1223

Abstract

This paper presents the development status of joint method between the superconducting YBCO coated conductors (YBCO CC). In general, the YBCO-CC tape consists of an upper stabilizer, substrate, buffer, YBCO and a bottom stabilizer. It is suggested that the stabilizer between the two YBCO-CC tapes need to be removed, in order to improve the characteristics of the joints. The removing process was conducted by using heat and partial etching. The resistance and critical current of the joints were measured from the curve. The optical micrographs were analyzed for microstructures between the joint areas. After several times of over current test, the critical currents of the various types of joint samples were examined for applying to the high temperature superconducting magnet system.

Keywords

barium compounds; critical currents; etching; high-temperature superconductors; joining processes; superconducting device testing; superconducting magnets; superconducting tapes; yttrium compounds; V-I curve; YBa₂Cu₃O_7-delta; critical current; high-temperature superconducting magnet system; joint characteristics; metallic stabilizer; optical micrographs; overcurrent test; partial etching; superconducting tape; superconductor coated conductors; Coated conductor; YBCO; joint; stabilizer;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2008.920811

Filename

4511473