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Journal of Materials Science

, Volume 17, Issue 11, pp 3101–3105 | Cite as

Zr-Hf interdiffusion in polycrystalline Y2O3-(Zr+Hf)O2

  • Y. Sakka
  • Y. Oishi
  • Ken Ando
Papers

Abstract

Lattice and grain-boundary interdiffusion coefficients were calculated from the concentration distributions determined for Zr-Hf interdiffusion in polycrystalline 16Y2O3·84(Zr1−x Hf x )O2 withx=0.020 and 0.100. The lattice interdiffusion coefficients were described byD=0.031 exp [−391 (kJ mol−1)/RT] cm2 sec−1 and the grain-boundary diffusion parameters byσD′=1.5×10−6exp [−309(kJ mol−1)/RT] cm3 sec−1 in the temperature range 1584–2116° C. Comparison of the results with those for the systems CaO-(Zr+Hf)O2 and MgO-(Zr+Hf)O2 indicated that the Zr self-diffusion coefficient was insensitive to the dopants in the fluorite-cubic ZrO2 solid solutions.

Keywords

Polymer Solid Solution Y2O3 Concentration Distribution Diffusion Parameter 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Chapman and Hall Ltd. 1982

Authors and Affiliations

  • Y. Sakka
    • 1
  • Y. Oishi
    • 1
  • Ken Ando
    • 1
  1. 1.Department of Nuclear EngineeringKyushu UniversityFukuokaJapan

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