Preparation of YBCO coated conductor by the TFA-MOD method

The MOD method is well known as a low-cost process for a coated conductor. We have manufactured long-length YBCO coated conductors by the TFA-MOD process using various metallic tapes. In this work, we applied a continuous coating technique, a so-called bead-coating process, to prepare YBCO precursor films on CeO₂ (PLD)/ Zr₂Gd₂O₇ (IBAD)/ Hastelloy tapes. The YBCO films prepared by this process reveal high in-plane crystal alignment after an appropriate heat treatment. The double-coated 10 cm-long YBCO films made by the bead-coating process exhibit maximum I_c and J_c values of 25 A/cm-width and 0.5 MA/cm², respectively. We also deposited oxide buffer layers on {100}<001> Ni tapes using the MOD method to make low-cost YBCO tapes by a so-called All-MOD process. We observed highly in plane textured CeO₂, and RE₂O₃ (RE = Gd, Y, Yb) using MOD method. The YBCO films were coated by the TFA-MOD on the CeO₂ (MOD) buffer layer. YBCO films were highly in-plane textured on CeO₂ (MOD)/cube-textured Ni tapes. The FWHM values of the CeO₂ and YBCO were 10.4 degrees and 11.0 degrees, respectively.