Grain boundary character dependence of oxygen grain boundary diffusion in α-Al2O3 bicrystals

被引：35

作者：

Nakagawa, Tsubasa ^{[1
,2
]}

Nishimura, Hitoshi ^{[1
]}

Sakaguchi, Isao ^{[2
]}

Shibata, Naoya ^{[1
]}

Matsunaga, Katsuyuki ^{[3
,4
]}

Yamamoto, Takahisa ^{[1
,3
,4
]}

Ikuhara, Yuichi ^{[1
,4
]}

机构：

[1] Univ Tokyo, Inst Engn Innovat, Bunkyo Ku, Tokyo 1138656, Japan

[2] Natl Inst Mat Sci, Optron Mat Ctr, Tsukuba, Ibaraki 3050044, Japan

[3] Nagoya Univ, Dept Mat Sci & Engn, Chikusa Ku, Nagoya, Aichi 4648603, Japan

[4] Japan Fine Ceram Ctr, Nanostruct Res Lab, Atsuta Ku, Nagoya, Aichi 4568587, Japan

来源：

SCRIPTA MATERIALIA | 2011年 / 65卷 / 06期

关键词：

Grain boundary diffusion; Alumina; Bicrystal; HREM; SIMS; SELF-DIFFUSION; ATOMIC STRUCTURES; YTTRIUM;

D O I：

10.1016/j.scriptamat.2011.06.024

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We measured oxygen diffusion coefficients (D-gb) along five grain boundaries (GBs) in alumina bicrystals by tracing O-18 by secondary ion mass spectrometry. Although all boundaries are classified as coincident site lattice boundaries with relatively ordered structures, D-gb varied up to 10(3) times among them. On the other hand, the boundaries with identical boundary planes had relatively similar diffusivities as well as similar structures, regardless of Sigma values. These results suggest that D-gb are related to GB atomic structures and hence the GB character, especially GB planes. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：544 / 547

页数：4

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