Cation interdiffusion in polycrystalline fluorite-cubic MgO-ZrO2 solid solution.

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概要

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• Lattice and grain-boundary interdiffusion coefficients were calculated from the concentration distributions as determined for cation interdiffusion in polycrystalline MgO-stabilized zirconias by applying a grain-boundary enhanced diffusion model. Lattice interdiffusion coefficients in the temperature range of 1650–1990 °C were represented by \tilde<I>D</I>=5.9×10<SUP>−4</SUP>exp [−293(kJ/mol)/<I>RT</I>] cm<SUP>2</SUP>/s. Magnesium self-diffusion coefficients were calculated from the obtained interdiffusion coefficients and the reported Zr self-diffusion coefficients. The results confirmed that interdiffusion in the fluorite-cubic solid solution is primarily controlled by the diffusivity of the faster cation.

• 公益社団法人 日本化学会の論文

著者

• Oishi Yasumichi

  Department Of Nuclear Engineering Faculty Of Engineering Kyushu University

• Sakka Yoshio

  Department of Nuclear Engineering, Kyushu University

• Ando Ken

  Department of Nuclear Engineering, Kyushu University

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