Oriented Microstructure of Ybco Thick Films

Abstract

AbstractThe surface morphology and internal structure of a superconducting screen printed thick film of YBCO has been examined by means of optical and scanning electron microscopy. The highly textured track was sintered at a temperature above the peritectic temperature of the 123 phase, and the resulting characteristic spherulitic morphology has been found to be associated with underlying elongated strands of CuO. The composition of the inter‐diffusion layer formed at the film/substrate boundary is consistent with a Ba(Zr,Cu)O3 solid solution with small concentrations of yttrium.