Dislocation Structure Analysis of Low Angle Tilt Grain Boundaries in Alumina by Elastic Theory

Abstract:

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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.

Info:

Periodical:

Materials Science Forum (Volumes 561-565)

Main Theme:

Edited by:

Young Won Chang, Nack J. Kim and Chong Soo Lee

Pages:

2465-2468

DOI:

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

Citation:

A. Nakamura et al., "Dislocation Structure Analysis of Low Angle Tilt Grain Boundaries in Alumina by Elastic Theory", Materials Science Forum, Vols. 561-565, pp. 2465-2468, 2007

Online since:

October 2007

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Price:

$35.00

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