The 95Zr cation self-diffusivity in fully-dense, nanocrystalline cubic

ZrO2·9.5mol%Y2O3 (n-YSZ, mean grain size 50nm) was studied by tracer selfdiffusion

and precision-grinding sectioning. At 897 to 937C, the 95Zr diffusion

coefficient in grain boundaries was found to be about 7 orders of magnitude higher

than in single crystals of similar composition.

Enhanced 95Zr Diffusion in Grain Boundaries of Nano-Crystalline

ZrO2·9.5mol%Y2O3. H.Drings, U.Brossmann, H.D.Carstanjen, Á.Szökefalvi-Nagy,

C.Noll, H.E.Schaefer: Physica Status Solidi A, 2009, 206[1], 54-8