Abstract
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: Autoradiographs show rapid grain boundary diffusion. DB is estimated as <105DL 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.
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