The self-diffusion of Zr 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 stable isotope, 96Zr, was used as a tracer and the samples were analyzed using secondary ion mass

spectrometry. The results could be described by:

Zr4+ (Y2O3-stabilized) 1070-1700C:     D (cm2/s) = 4.1 x 10-2 exp[-4.5(eV)/kT]

Zr4+ (CaO-stabilized) 1120-1700C:     D (cm2/s) = 2.5 x 101 exp[-5.3(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