Preparation of biaxially cube textured Cu substrate tapes for HTS coated conductor applications

Cube textured copper tapes have been prepared as possible substrates for deposition of high critical current density YBCO films with intermediate metallic or ceramic biaxially textured buffer layers. The cube texture was promoted by recrystallization after cold rolling. The deformation degree, the effect of deformation reduction at each pass and the influence of annealing temperature on the recrystallization process has been studied. Different parameters have been optimized in order to obtain the sharpest cube texture {100}[001]. The full width half-maximum mean values (FWHM) of the grains out-of-plane measured from rocking curves in the parallel and perpendicular directions to the rolling are 10 degrees and 14 degrees, respectively, while the in-plane FWHM obtained from the pole figures is 10 degrees.