한국초전도학회:학술대회논문집

The Korean Superconductivity Society (한국초전도학회)
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A Study of Joint Characteristic of BSCCO Superconductor Tape

BSCCO 고온초전도 선재의 접합특성 연구

  • Kim, Jung-Ho (Sungkyunkwan University, School of Metallurgical and Materials Science Engineering) ;
  • Kim, Joong-Seok (Sungkyunkwan University, School of Metallurgical and Materials Science Engineering) ;
  • Kim, Tae-Woo (Sungkyunkwan University, School of Metallurgical and Materials Science Engineering) ;
  • Ji, Bong-Ki (Sungkyunkwan University, School of Metallurgical and Materials Science Engineering) ;
  • Joo, Jin-Ho (Sungkyunkwan University, School of Metallurgical and Materials Science Engineering) ;
  • Nah, Wan-Soo (Sungkyunkwan University, School of Electrical and Computer Engineering)
  • 김정호 (성균관대학교 금속재료공학부) ;
  • 김중석 (성균관대학교 금속재료공학부) ;
  • 김태우 (성균관대학교 금속재료공학부) ;
  • 지봉기 (성균관대학교 금속재료공학부) ;
  • 주진호 (성균관대학교 금속재료공학부) ;
  • 나완수 (성균관대학교 전기전자컴퓨터공학부)
  • Published : 1999.08.18
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Abstract

We evaluated the effect of joining process such as contact method, shape of joined area and pressure on the electrical property of Bi-2223 superconducting tape. It was observed that the current capacity was reduced at the transition area of the joined tape and was significantly dependent on the uniaxial pressure. The lap-joined tape, fabricated with a pressure of 1,000-1,600 MPa, show the highest value of current capacity(80-90%) of the tape itself. It is believed the highest value of current capacity results from improvement in core density, contacting area and grain alignment, etc. In addition, the irreversible strain( ${\varepsilon}$ irrev) for the joined tape· was measured to be 0.1%, smaller than that of enjoined tape( ${\varepsilon}$ irrev = 0.3%). The decrease in the strength and irreversible strain for joined tape is believed to be due to the irregular geometry/morphology of the transition area of the tape.

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