Joint Characteristics of the YBCO Coated Conductor (CC) by Chemical Etching

Author

Kim, Hyun Sung ; Kwon, Na Young ; Chang, Ki Sung ; Ko, Tae Kuk ; Kim, Ho Min ; Kim, Woo-Seok ; Park, Chan ; Lee, Haigun

Author_Institution

Dept. of Mater. Sci. & Eng., Korea Univ., Seoul, South Korea

Volume

19

Issue

3

fYear

2009

fDate

6/1/2009 12:00:00 AM

Firstpage

2835

Lastpage

2838

Abstract

The YBCO coated conductor (CC) is one of the most promising superconductors for various superconducting applications. Although it has many advantages, joints of the YBCO CC are inevitable because there are technical difficulties in lengthening the YBCO CC. In the joining process, it is important to reduce the joint resistance between the YBCO CCs in order to operate in a persistent current mode. Several approaches have been proposed to eliminate the stabilizer of the YBCO CC. Among them, this paper introduces a chemical etching method that can reduce the damaging influences to the superconductor layer in the YBCO CC compared with physical or thermal methods, which may degrade the features of the superconductor. This paper discusses the characteristics of joined YBCO CCs in terms of the resistance and critical currents of the joints from the V - I curve.

Keywords

barium compounds; critical currents; etching; high-temperature superconductors; joining processes; persistent currents; solders; superconducting thin films; yttrium compounds; V-I curve; YBCO coated conductor; YBa₂Cu₃O_7-delta; chemical etching; critical currents; joining process; joint resistance; persistent current; solder; superconductor layer; Etching; YBCO coated conductor (CC); joint; stabilizer;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2009.2018854

Filename

5153195