Cationic Self‐Diffusion in Calcia‐Stabilized Zirconia

Self‐diffusion of Zr in 12 and 16 mol.% CaO and of Ca in 16 mol.% CaO cubic zirconia was measured by the sectioning technique from 1700° to 2150°C. Lattice self‐diffusion coefficients are: image Autoradiographs show rapid grain boundary diffusion. D B is estimated as <10 5 D L between 1800° and 2150°C. The low cation self‐diffusion coefficients are compared with the high anion rate, and their effect on the diffusion‐controlled properties of zirconia is discussed.