Improvement of high-temperature creep resistance in fine-grained Al2O3 by Zr4+ segregation in grain boundaries
Improvement of high-temperature creep resistance in fine-grained Al2O3 by Zr4+ segregation in grain boundaries
复制标题
Zr4 晶界偏析提高细晶 Al2O3 的高温蠕变抗力
DOI：
10.1080/095008397179327
复制
发表时间：
1997
影响因子：
1.2
通讯作者：
T. Sakuma
中科院分区：
文献类型：
--
作者：
H. Yoshida;K. Okada;Y. Ikuhara;T. Sakuma
ZrO掺杂显著提高了Al 2 O3陶瓷的高温抗蠕变性能。锆离子在Al-O晶界偏聚。蠕变的激活能在高纯度的Al 2 O 3和ZrO掺杂的Al O-估计分别为430和650千焦mol-1。Al离子的晶界扩散率预计将减少Zr 4+在晶界中的偏析。
The high-temperature creep resistance in Al2 O3 is improved greatly by ZrO doping. Zirconium ions are found to be segregated in Al O grain boundaries. The activation energies for creep in high-purity Al2 O3 and ZrO-doped Al O are - estimated to be 430 and 650 kJ mol1, respectively. The grain boundary diffusivity of Al ions is expected to be reduced by the segregation of Zr4+ in the grain boundaries.