Enhanced 95Zr diffusion in grain boundaries of nano‐crystalline ZrO2·9.5 mol% Y2O3

Enhanced 95Zr diffusion in grain boundaries of nano‐crystalline ZrO2·9.5 mol% Y2O3
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纳米晶 ZrO2·9.5 mol% Y2O3 晶界中 95Zr 的增强扩散

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发表时间:
2009
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通讯作者:
H. Schaefer
H. Schaefer
中科院分区:
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作者:
H. Drings;U. Brossmann;H. Carstanjen;Á. Szökefalvi;Cornelia Noll;H. Schaefer

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通过示踪剂自扩散和精密研磨切片研究了95Zr阳离子在全致密、纳米晶立方ZrO2·9.5 mol% Y2O3 (n - YSZ,平均晶粒尺寸为50 nm)中的自扩散率。在897 ~ 937℃的温度范围内,晶粒边界上的95Zr扩散系数比相同成分的单晶高7个数量级。(©2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
The 95Zr cation self‐diffusivity in fully‐dense, nanocrystalline cubic ZrO2·9.5 mol% Y2O3 (n‐YSZ, mean grain size 50 nm) has been studied by tracer self‐diffusion and precision‐grinding sectioning. In the temperature range of 897 °C to 937 °C the 95Zr diffusion coefficient in grain boundaries was found to be about 7 orders of magnitude higher than in single crystals of similar composition. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)