Friday, 2C-05, 11:40-11:50

Reel-to-Reel, All-MOD YBCO//Buffer//NiW Coated Conductors with Ultrafast Pyrolysis

Paul G. Clem

Cynthia V. Edney, Donald L. Overmyer, Michael P. Siegal

Sandia National Laboratories, PO Box 5800, Albuquerque, NM 87185-1411
505-272-7624 phone, 505-272-7336 fax, pgclem@sandia.gov email

All-solution deposition routes have been developed for processing epitaxial YBCO film coated conductors on Ni-W RABiTS, and recently extended to 10 meter lengths. Recent results are presented detailing all-solution deposited reel-to-reel buffer layers (SrTiO₃ and CeO₂/LZO) and modified TFA method YBCO coated conductors with critical current densities J_c (77K) > 1 MA/cm₂ on rolling-assisted, biaxially textured, (200) oriented Ni-W alloy tapes. The reel-to-reel YBCO deposition utilizes an instant pyrolysis (< 2 minutes) to enable rapid linear production speeds of up to 90 meters/hour. Important all-solution deposition process variables will be discussed, including the influence of substrate orientation, buffer layer roughness, and buffer layer thickness.

Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the United States Department of Energy's NNSA under contract DE-AC04-94AL85000.

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