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Atomic-Scale Processes of Grain-Boundary Faceting in a Zirconia Bicrystal

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Abstract:

In this paper, we characterized atomic structure of a Σ = 3, [110]/{112} grain boundary in a yttria-stabilized cubic zirconia bicrystal. High-resolution transmission electron microscopy (HRTEM) clearly revealed that the grain boundary migrated to form {111}/{115} periodical facets, although the bicrystal was initially joined so as to have the symmetric straight boundary plane of {112}. Atomic-scale process for the facet growth could be modeled by the continuous flippings of atoms at the boundary core.

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Periodical:

Materials Science Forum (Volumes 558-559)

Pages:

955-958

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.558-559.955

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Online since:

October 2007

Authors:

Naoya Shibata, Fumiyasu Oba, Takahisa Yamamoto, Yuichi Ikuhara

Keywords:

Bi-Crystal, Faceting, Grain Boundary Atomic Structure, High Resolution Electron Microscopy (HREM), Static Lattice Calculations, Zirconia

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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