Earticle

초록

영어

In superconducting coil applications particularly in wet wound coils, coated conductor (CC) tapes are subjected to different type of stresses that could affect its electromechanical transport property. These include hoop stress acting along the length of the CC tape and the Lorentz force acting perpendicular to the CC tape’s surface. Since the latter is commonly associated with the delamination problem of multi-layered REBCO CC tapes, more understanding and attention on the delamination phenomena induced in the case of coil applications are needed. Difference on the coefficient of thermal expansion (CTE) of each constituent layer of the CC tape, the bobbin, and the impregnating materials is the main causes of delamination in CC tapes when subjected to thermal and mechanical cycling. In the design of degradation-free superconducting coils, therefore, characterization of the delamination behaviors including mechanism and strength in the multi-layered REBCO CC tapes becomes a critical issue. Various trials to increase the delamination strength by improving interface characteristics at interlayers have been performed. In this study, in order to investigate the influences of laser cleaning and Ag annealing treated at the substrate side surface, transverse tensile tests were conducted under different sample configurations using 4.5mm x 8 mm upper anvil. The mechanical delamination strength of differently processed CC samples was examined at room temperature (RT). As a result, the Sample 1 with the additional laser cleaning and Ag annealing processes and the Sample 2 with additional Ag annealing process only showed higher mechanical delamination strength as compared to the Sample 3 without such additional treatments. Sample 3 showed quite different behavior when the loading direction is to the substrate side where the delamination strength much lower as compared to other cases.

목차

Abstract
 1. INTRODUCTION
 2. EXPERIMENTAL PROCEDURES
  2.1. Samples
  2.2. Transverse tension test
 3. RESULTS AND DISCUSSION
 4. SUMMARY
 ACKNOWLEDGMENT
 REFERENCES

키워드

저자

• Hyung-Seop Shin [ Andong National University, Andong, Kyungbuk 35729 Korea ] Corresponding author
• Zhierwinjay Bautista [ Andong National University, Andong, Kyungbuk 35729 Korea ]
• Seung-Hyun Moon [ SuNAM Co Ltd., Anseong, Gyunggi-do, 17554 Korea ]
• Jae-Hun Lee [ SuNAM Co Ltd., Anseong, Gyunggi-do, 17554 Korea ]
• Byoung-Jean Mean [ SuNAM Co Ltd., Anseong, Gyunggi-do, 17554 Korea ]

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  한국초전도·저온논문지 (구 한국초전도저온공학회논문지) [Progress in Superconductivity and Cryogenics]

• 간기

  계간

• pISSN

  1229-3008

• eISSN

  2287-6251

• 수록기간

  1999~2026

• 등재여부

  KCI 등재,SCOPUS

• 십진분류

  KDC 427 DDC 537