Abstract
Microstructures of melt-textured YBCO samples with embedded nanosized particles ofY2BaCuO5 (Y-211) andY2Ba4CuMOx (M-2411with M = U,Zr) are analysed by means of electron backscatter diffraction (EBSD). With the recentdevelopments of the EBSD technique, we can directly measure the crystallographicorientation of the embedded nanoparticles, employing a spatial resolution of about 40 nm.The high image quality of the Kikuchi patterns allows true three-phase (YBCO,Y-211 and M-2411) scans to be performed. The Y-211 particles do not exhibit anypreferred orientation, even if their size is considerably reduced, to the 100 nmrange. The size reduction reduces the negative influence of the Y-211 particleson the YBCO matrix, however. U-2411 particles, which are formed during theprocessing stage, do not show any orientation, and with increasing concentration, sometexture develops. In contrast to this, embedded Zr-2411 particles are fully orientedin the (001) orientation according to the surrounding superconducting matrix.
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