Coated Conductors on Tubular Metallic Wires
by Combined Chemical Approaches

C. Millon^1,2, S. Morlens¹, P. Chaudoüet², C. Jimenez²,
J.L. Soubeyroux¹, P. Tixador¹, A. Allais³, C. F. Theune⁴, P. Odier¹

¹ Institut Néel and CRETA, CNRS&UJF, 25 av des martyrs,
BP 166, 38042 Grenoble cedex 09, France.
² LMGP CNRS UMR5628- Grenoble INP –Minatec,
3 parvis Louis Néel, BP 257, 38016 Grenoble, France.
³ Nexans Research Centre, 170, avenue Jean Jaurès,
69353 Lyon Cedex 07, France.
⁴ Nexans Deutschland Industry – Hannover
Corresponding author: [email protected]

Abstract - Fabrication of YBCO wires has been explored by using tubes formed from textured tapes. The texture of tubes made from Ni-5 at % W is characterized as a bi-axial texture developing along both the axis and the circumference of the cylinder. The deposition of a buffer layer by metal-organic deposition on such a tube is described with the practical example of La₂Zr₂O₇. A superconducting YBCO layer is deposited on top; its texture and the electrical performance are evaluated. In the present state of the art, the YBCO is superconducting at 88 K; it is textured, but can carry only week supercurrents due to insufficient percolation paths. Improvements of the process are underway to enhance the transport current properties.

Keywords  - YBCO, HTS wire, coated conductor, tubular conductor, textured tube, La2Zr2O7, LZO

Submitted May 15, 2009; accepted July 20, 2009.  Reference No. ST115 ; Category 2, 5.
See also P. Odier et al., Supercond. Sci. Technol. 22, 125024 (2009)