Abstract
Zr–Hf interdiffusion was studied in the temperature range of 1650° to 1850°C in air for polycrystalline fluorite‐cubic systems of 90CeO2·10(Zr1‐xHfx)O2 and 60CeO2·40(Zr1‐xHfx)O2. Lattice and grain‐boundary diffusion parameters were calculated from the Zr–Hf concentration distributions by using the grain‐boundary diffusion equation of Oishi and Ichimura. The cation iattice diffusivity was close to that in the fluorite‐cubic Y2O2‐ZrO2 solid solution.
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