The self-diffusion of Y in monocrystalline yttria-stabilized zirconia and calcia-stabilized zirconia (containing 10 to 32mol%Y2O3 and 11 or 17mol%CaO, respectively) was measured between 960 and 1700C. The radioactive tracer, 88Y, was used with an abrasive sectioning technique. The results could be described by the relationship:

(Y2O3-stabilized) 1400-1676C:     D (cm2/s) = 2.4 x 10-2 exp[-4.2(eV)/kT]

M.Kilo, M.A.Taylor, C.Argirusis, G.Borchardt, B.Lesage, S.Weber, S.Scherrer, H.Scherrer, M.Schroeder, M.Martin: Journal of Applied Physics, 2003, 94[12], 7547-52