Dislocation structure analysis of low angle tilt grain boundaries in alumina by elastic theory

被引：0

作者：

Nakamura, A. ^{[1
]}

Tochigi, E. ^{[2
]}

Shibata, N. ^{[2
]}

Yamamoto, T. ^{[2
]}

Ikuhara, Y. ^{[2
]}

机构：

[1] Osaka City Univ, Dept Intelligent Mat Engn, Sumiyoshi Ku, 3-3-138 Sugimoto, Osaka 5588585, Japan

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

来源：

PRICM 6: SIXTH PACIFIC RIM INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS AND PROCESSING, PTS 1-3 | 2007年 / 561-565卷

关键词：

low angle boundaries; alumina; dislocations; stacking fault;

D O I：

10.4028/www.scientific.net/MSF.561-565.2465

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Structure and configuration of boundary dislocations on the low angle tilt grain boundaries in alumina were considered based on the ideas that the boundary is composed of regularly arrayed edge dislocations and that the dislocations could dissociate into partial dislocations as well as glide dislocations in bulk. Moreover, the structure of the dissociated boundary dislocations were evaluated by the calculations based on an elastic theory. The calculations indicated that the largeness of the stacking fault region between partial dislocations formed by the dissociation will decrease with increasing tilt angles. It can be said that the idea and calculations used here will be powerful in considering the dislocation structure of low angle tilt grain boundaries that are not or are difficult to be identified.

引用

页码：2465 / +

页数：2

共 10 条

[1] STRUCTURE OF (0110) DISLOCATION IN SAPPHIRE [J].

BILDESORENSEN, JB ;

THOLEN, AR ;

GOOCH, DJ ;

GROVES, GW .

PHILOSOPHICAL MAGAZINE, 1976, 33 (06) :877-889

[2]

FRANK FC, 1951, PHILOS MAG, V42, P809

[3]

Hirth J. P., 1982, Theory of Dislocations, V2

[4] Dislocation structures of low-angle and near-Σ3 grain boundaries in alumina bicrystals [J].

Ikuhara, Y ;

Nishimura, H ;

Nakamura, A ;

Matsunaga, K ;

Yamamoto, T .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2003, 86 (04) :595-602

[5] CALCULATED STACKING-FAULT ENERGIES IN ALPHA-AL2O3 [J].

KENWAY, PR .

PHILOSOPHICAL MAGAZINE B-PHYSICS OF CONDENSED MATTER STATISTICAL MECHANICS ELECTRONIC OPTICAL AND MAGNETIC PROPERTIES, 1993, 68 (02) :171-183

[6] STACKING-FAULT ENERGY IN SAPPHIRE (ALPHA-AL2O3) [J].

LAGERLOF, KDP ;

MITCHELL, TE ;

HEUER, AH ;

RIVIERE, JP ;

CADOZ, J ;

CASTAING, J ;

PHILLIPS, DS .

ACTA METALLURGICA, 1984, 32 (01) :97-105

[7] Multiple dissociation of grain boundary dislocations in alumina ceramics [J].

Nakamura, A. ;

Matsunaga, K. ;

Yamamoto, T. ;

Ikuhara, Y. .

PHILOSOPHICAL MAGAZINE, 2006, 86 (29-31) :4657-4666

[8] Direct observation of basal dislocation in sapphire by HRTEM [J].

Nakamura, A ;

Yamamoto, T ;

Ikuhara, Y .

ACTA MATERIALIA, 2002, 50 (01) :101-108

[9] Nonstoichiometric dislocation cores in α-alumina [J].

Shibata, N. ;

Chisholm, M. F. ;

Nakamura, A. ;

Pennycook, S. J. ;

Yamamoto, T. ;

Ikuhara, Y. .

SCIENCE, 2007, 316 (5821) :82-85

[10] Stacking-fault formation in [001] small-angle symmetric tilt grain boundaries in cubic zirconia bicrystals [J].

Shibata, N ;

Morishige, N ;

Yamamoto, T ;

Ikuhara, Y ;

Sakuma, T .

PHILOSOPHICAL MAGAZINE LETTERS, 2002, 82 (04) :175-181

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