Transport characteristics of CVD-YBCO coated conductor under hoop stress

Gen Nishijima, Hidetoshi Oguro, Satoshi Awaji, Kazuo Watanabe, Koji Shikimachi, Naoki Hirano, Shigeo Nagaya

Research output: Contribution to journalArticlepeer-review

32 Citations (Scopus)


Transport characteristics of IBAD/ CVD-YBa2Cu3O 7 (YBCO) coated conductor were measured at 4.2 K under hoop stress. The conductor was fabricated by a multi-stage metal-organic chemical vapor deposition (CVD) method. The YBCO layer was deposited on Hastelloy substrate with PLD-CeO2 and IBAD-Gd2Zr2O7 buffer layers. A 20-μm silver layer was sputtered as a protective and stabilizing layer. The hoop stress test coils were fabricated by winding the conductor on a 250-mm diameter stainless-steel bobbin by five turns. Two coils, denoted as coils A and B, were fabricated. The Hastelloy substrate located outside for coil A and inside for coil B. Both coils were tested in magnetic field at 4.2 K under hoop stresses. Coil A and B experienced 1028 and 777 MPa at 11 T, 4.2 K. The measured stress-strain curves provided that the Young's modulus of the conductor was 190 GPa. The tolerable stress of ~1000 MPa and the Young's modulus of 190 GPa are consistent with the values obtained by a tensile test. The hoop stress test results indicates that the YBCO coated conductor is promising for application under huge hoop stress.

Original languageEnglish
Article number4520249
Pages (from-to)1131-1134
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Issue number2
Publication statusPublished - 2008 Jun


  • Coated conductor
  • Hoop stress
  • Magnetic field
  • Transport characteristics
  • YBCO

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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