Direct measurements of grain boundary sliding in yttrium-doped alumina bicrystals

被引：40
|
作者：
Matsunaga, K
Nishimura, H
Muto, H
Yamamoto, T
Ikuhara, Y
机构：
[1] Univ Tokyo, Inst Engn Innovat, Bunkyo Ku, Tokyo 1138656, Japan
[2] Univ Tokyo, Dept Mat Sci, Bunkyo Ku, Tokyo 1138656, Japan
[3] Toyohashi Univ Technol, Fac Engn, Dept Mat Sci, Toyohashi, Aichi 4418580, Japan
[4] Univ Tokyo, Dept Adv Mat Sci, Bunkyo Ku, Tokyo 1138656, Japan
来源：
APPLIED PHYSICS LETTERS | 2003年 / 82卷 / 08期
关键词：
D O I：
10.1063/1.1555690
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The behavior of grain boundary sliding in pure and yttrium-doped Al2O3 was directly measured at a high temperature, using bicrystal experiments. For this purpose, we fabricated Al2O3 bicrystals containing a random grain boundary with or without yttrium ions. High-resolution transmission electron microscopy observations and energy dispersive x-ray spectroscopy analyses showed that bicrystals were successfully joined at an atomic scale, and doped yttrium ions segregated along the grain boundaries. It was found by compressive creep tests that the grain boundary sliding rate was restrained by two orders of magnitude due to yttrium addition, as compared to that of undoped bicrystals. (C) 2003 American Institute of Physics.
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收藏
页码：1179 / 1181
页数：3
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