Morphologic and electric characterization of YBa₂Cu₃O_x/Ag composites

In this work, we performed a three-dimensional analysis of YBa₂Cu₃O_x/Ag samples microstructure, especially with regard to silver distribution. By this way, we study thoroughly the correlation between the morphology and the electrical behaviour of the samples varying the silver content. We were able to show that the percolation limit of silver in YBCO is around 7.5 wt.%. We pointed out that the silver drops tends to disorder the system at high concentration, suggesting the opportunity of texturing under uniaxial pressure.