Increased mobility of an α-Al2O3 grain boundary by electron-beam irradiation

When subjected to electron-beam irradiation in a transmission electron microscope, the grain boundary in an α -Al 2 O 3 bicrystal is observed to migrate even at room temperature. The bicrystal is composed of grains with the same normal direction, and thus the difference in strain energy or surface e...

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Bibliographic Details
Published inJournal of materials science Vol. 53; no. 4; pp. 2383 - 2388
Main Authors Lee, Sung Bo, Lee, Seung-Yong, Kim, Miyoung, Han, Heung Nam
Format Journal Article
LanguageEnglish
Published New York Springer US 01.02.2018
Springer Nature B.V
Subjects
Aluminum oxide
Bicrystals
Ceramics
Characterization and Evaluation of Materials
Chemistry and Materials Science
Classical Mechanics
Crystallography and Scattering Methods
Electron beams
Electron irradiation
Grain boundaries
Materials Science
Migration
Polymer Sciences
Radiolysis
Solid Mechanics
Surface energy
Electron Beam Irradiation
EELS Measurement
Grain Boundaries (GB)
Electron Energy Loss Spectroscopy (EELS)
Radiolytic Effects
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Summary:When subjected to electron-beam irradiation in a transmission electron microscope, the grain boundary in an α -Al 2 O 3 bicrystal is observed to migrate even at room temperature. The bicrystal is composed of grains with the same normal direction, and thus the difference in strain energy or surface energy between the two grains cannot explain the observed migration. We attribute this phenomenon to an increase in grain boundary mobility by electron-beam irradiation, especially by radiolysis effects.
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-017-1688-z