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The mechanical properties of a ceramic superconductor material (YBaCuO or Y-123) have been studied using the Nanoindentation technique, for Bridgman and Top Seeded Melt Growth textured samples. The structure of the textured material is heterogeneous, and two different phases are present: a matrix of Y-123 and Y-211 spherical or quasi-spherical inclusions. The Hardness and Young's modulus have been obtained for each phase using a sharp tip indenter and the Oliver and Pharr equations. The different fracture mechanisms activated around and under the residual imprints have been observed by...