Zr diffusion coefficient and activation energy calculations based on EDXRF measurement and evaluation of mechanical characteristics of YBa2Cu3O7 − x bulk superconducting ceramics diffused with Zr nanoparticles

Variation of Zr concentration with the thickness of the sample subjected to Zr diffusion at 945 °C indicates that there are two concentration regions such as slow and fast. The Zr diffusion coefficients belonging to the regions for the Zr6 sample are calculated to be about D1 = 7.38 × 10− 9 cm2s− 1 and D2 = 9.96 × 10− 8 cm2s− 1, respectively.