Continuous YBCO deposition by MOCVD for coated conductors

MOCVD is an economic method for the production of coated conductors. A single source MOCVD-system for continuous deposition on metal tapes was developed. Single crystals, IBAD buffered tapes and textured Ni-tapes were transported through the deposition zone and coated with YBCO. The velocity for the substrate transport was 4 m/h. On single crystals and IBAD buffered substrates the best critical current density of the 300-350 nm thick YBCO films were 2.5 and 4.8 MA cm ^-2 at 77 K. On CeO ₂/YSZ/CeO ₂ buffered textured nickel tapes the j_c of the 500 μm thick YBCO film was 0.25 MA cm ^-2 at 77 K. Textured oxide buffer layers were deposited by MOCVD on single crystals and textured Ni in reducing atmosphere.