Diffusion of niobium in yttria-stabilized zirconia and in titania-doped yttria-stabilized zirconia polycrystalline materials

被引：8
作者：
Kowalski, K.
Bernasik, A.
Camra, J.
Radecka, M.
Jedlinski, J.
机构：
[1] AGH Univ Sci & Technol, Dept Mat Sci & Anal, Fac Met & Mat Sci, PL-30059 Krakow, Poland
[2] AGH Univ Sci & Technol, Fac Phys & Appl Comp Sci, PL-30059 Krakow, Poland
[3] Jagiellonian Univ, Reg Lab Physicochem Anal & Struct Res, PL-30060 Krakow, Poland
[4] AGH Univ Sci & Technol, Fac Mat Sci & Ceram, PL-30059 Krakow, Poland
来源：
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2006年 / 26卷 / 15期
关键词：
grain boundaries; diffusion; ZrO2; Nb; grain boundary diffusion;
D O I：
10.1016/j.jeurceramsoc.2005.10.004
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Bulk and grain boundary diffusion of Nb5+ cations in yttria-stabilized zirconia (YSZ, 8 mol% Y2O3-92 mot% ZrO2) and in titania-doped yttria-stabilized zirconia (Ti-YSZ, 5 mol% TiO2-8 mol% Y2O3-87 mol% ZrO2) was studied in air in the temperature range from 900 to 1300 degrees C. Experiments were performed in the B-type kinetic region. Diffusion profiles were determined using the secondary ion mass spectrometry (SIMS). The temperature dependencies of the bulk diffusion coefficient D and the grain boundary diffusion parameter D'delta s for both the materials were calculated. The activation energies of these transport processes in YSZ amounts to 258 and 226 kJ mol(-1), respectively, and 232 and 114 kJ mol(-1) in Ti-YSZ. The results were compared to the diffusion data of other cations previously obtained for the same material. (c) 2005 Elsevier Ltd. All rights reserved.
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页码：3139 / 3143
页数：5
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