TY - JOUR
T1 - Joint Resistance Characteristics in Ultrasonic Weld REBCO CC Tapes at Various Temperatures and Magnetic Fields
AU - Shin, Hyung Seop
AU - Diaz, Mark Angelo
AU - Bautista, Zhierwinjay Mezona
AU - Awaji, Satoshi
N1 - Funding Information:
Manuscript received September 16, 2017; accepted December 21, 2017. Date of publication December 29, 2017; date of current version January 18, 2018. This work was supported in part by a grant from the National Research Foundation of Korea (NRF-2017-001901) funded by the Ministry of Science, ICT, and Future Planning, South Korea, and in part by a grant from the Power Generation and Electric Delivery Program of the Korea Institute of Energy Technology Evaluation and Planning funded by the Ministry of Trade, Industry, and Energy (20131010501800). (Corresponding author: Hyung-Seop Shin.) H.-S. Shin, M. A. Diaz, and Z. M. Bautista are with the Department of Mechanical Design Engineering, Graduate School, Andong National University, Andong 36729, South Korea (e-mail: hsshin@anu.ac.kr; kram09.mad@ gmail.com; jhayebautista0612@ymail.com).
Publisher Copyright:
© 2017 IEEE.
PY - 2018/6
Y1 - 2018/6
N2 - In coil and magnet manufacturing that requires long length 2G coated conductor (CC) tapes, the development of joining methods for CC tapes with zero or low resistance is necessary. Nowadays, although it is said that CC tapes with around 1-km length were produced, it is still inadequate to produce cables and coil windings. Therefore, the development of a stable and reliable joint for long CC tapes having a low joint resistance (Rj) and the understanding of the magnetic field and temperature dependence of Rj is essential in the design of high field magnets and coils. In this study, the characteristics of joint resistance in REBCO CC tapes jointed using ultrasonic welding (UW) method were experimentally evaluated in various temperatures and magnetic field. The CC joints were also fabricated by hybrid welding, which incorporates soldering to the UW joint. The magnetic field and temperature dependencies of joint resistance of both types CC joints were measured. The acquired results showed that the joint resistance decreased with a decrease of temperature, and increased slightly as magnetic field applied increased.
AB - In coil and magnet manufacturing that requires long length 2G coated conductor (CC) tapes, the development of joining methods for CC tapes with zero or low resistance is necessary. Nowadays, although it is said that CC tapes with around 1-km length were produced, it is still inadequate to produce cables and coil windings. Therefore, the development of a stable and reliable joint for long CC tapes having a low joint resistance (Rj) and the understanding of the magnetic field and temperature dependence of Rj is essential in the design of high field magnets and coils. In this study, the characteristics of joint resistance in REBCO CC tapes jointed using ultrasonic welding (UW) method were experimentally evaluated in various temperatures and magnetic field. The CC joints were also fabricated by hybrid welding, which incorporates soldering to the UW joint. The magnetic field and temperature dependencies of joint resistance of both types CC joints were measured. The acquired results showed that the joint resistance decreased with a decrease of temperature, and increased slightly as magnetic field applied increased.
KW - CC joint resistance
KW - cryogenic temperature
KW - magnetic field
KW - ultrasonic welding
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U2 - 10.1109/TASC.2017.2788085
DO - 10.1109/TASC.2017.2788085
M3 - Article
AN - SCOPUS:85040030747
SN - 1051-8223
VL - 28
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
IS - 4
M1 - 8241770
ER -