Zr-Hf interdiffusion in polycrystalline Y2O3-(Zr+Hf)O2
Zr-Hf interdiffusion in polycrystalline Y2O3-(Zr+Hf)O2
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多晶 Y2O3-(Zr Hf)O2 中 Zr-Hf 相互扩散
DOI：
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发表时间：
1982
期刊：
影响因子：
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通讯作者：
K. Ando
中科院分区：
文献类型：
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作者：
Y. Sakka;Y. Oishi;K. Ando
根据确定的多晶 16Y2O3·84(Zr1−x Hfx)O2 中 Zr-Hf 相互扩散的浓度分布计算晶格和晶界相互扩散系数，其中 x=0.020 和 0.100。在1584~2116℃的温度范围内，晶格互扩散系数用D=0.031 exp [−391 (kJ mol−1)/RT] cm2 sec−1 描述，晶界扩散参数用σD′=1.5×10−6exp [−309(kJ mol−1)/RT] cm3 sec−1 描述。与系统结果的比较CaO-(Zr+Hf)O2和MgO-(Zr+Hf)O2表明Zr自扩散系数对萤石立方ZrO2固溶体中的掺杂剂不敏感。
Lattice and grain-boundary interdiffusion coefficients were calculated from the concentration distributions determined for Zr-Hf interdiffusion in polycrystalline 16Y2O3·84(Zr1−x Hfx)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.