Fabrication and growth mechanism of YBCO coated conductors by TFA-MOD process

T. Honjo, Y. Nakamura, R. Teranishi, Y. Tokunaga, H. Fuji, J. Shibata, S. Asada, T. Izumi, Y. Shiohara, Y. Iijima, T. Saitoh, A. Kaneko, K. Murata

Research output: Contribution to journalConference articlepeer-review

54 Citations (Scopus)

Abstract

In the development for the coated conductors, the trifluoroacetates-metal organic deposition (TFA-MOD) process using the multi-coating method was applied to form thicker YBa2Cu3Oy (YBCO) films on the CeO2 buffered IBAD(Zr2Gd2O 7)/Hastelloy tape. As a result, in the 5 times coated film with 1.38 μm in thickness, the Jc and Ic values achieved to be 1.5 MA/cm2 and 210 A, respectively. Then, we fabricated a 1 m long YBCO tape by the continuous reel-to-reel system. As a result, we confirmed the tape to be homogeneous by XRD analysis. Additionally, we report the theoretical analysis of YBCO growth during post-annealing in the TFA-MOD process considering both the diffusion in the gas boundary layer and the growth kinetics at the precursor/YBCO interface. This model reveals a basic idea of the growth mechanism to define the steady state growth rate, and could explain the experimental results. In addition, it predicts that the growth rate could be estimated from the partial pressure of the water vapor of the inlet gas.

Original languageEnglish
Pages (from-to)873-881
Number of pages9
JournalPhysica C: Superconductivity and its applications
Volume392-396
Issue numberPART 2
DOIs
Publication statusPublished - Oct 2003
Externally publishedYes
EventProceedings of the 15th International Symposium on Superconduc - Yokohama, Japan
Duration: Nov 11 2002Nov 13 2002

All Science Journal Classification (ASJC) codes

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

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