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Structures of dissociated 〈1 View the MathML source 0 0〉 dislocations and {1 View the MathML source 0 0} stacking faults of alumina (α-Al2O3) / E. Tochigi in Acta materialia, Vol. 58 N° 1 (Janvier 2010) 

Public ISBD [article]  in Acta materialia > Vol. 58 N° 1 (Janvier 2010) . - pp. 208–215 Titre : Structures of dissociated 〈1 View the MathML source 0 0〉 dislocations and {1 View the MathML source 0 0} stacking faults of alumina (α-Al2O3) Type de document : texte imprimé Auteurs : E. Tochigi, Auteur ; N. Shibata, Auteur ; A. Nakamura, Auteur Année de publication : 2010 Article en page(s) : pp. 208–215 Note générale : Métallurgie Langues : Anglais (eng) Mots-clés : Alumina  (α-Al2O3)  Grain  boundary  Dislocation  Stacking  fault  Transmission  electron  microscopy  (TEM) Résumé : An alumina (α-Al2O3) bicrystal with a {1 View the MathML source 0 0}/〈1 1 View the MathML source 0〉 2° low-angle grain boundary was fabricated by diffusion bonding, and the grain boundary was observed by high-resolution transmission electron microscopy (HRTEM). It was found that 1/3〈1 View the MathML source 0 0〉 partial-dislocation triplets were periodically arrayed along the boundary. The atomic structure within the {1 View the MathML source 0 0} stacking faults in between the partial-dislocation triplets was determined by HRTEM combined with first-principles calculations. We discuss the stacking fault structures and their excess energies in detail. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science/article/pii/S1359645409005941 [article] Structures of dissociated 〈1 View the MathML source 0 0〉 dislocations and {1 View the MathML source 0 0} stacking faults of alumina (α-Al2O3) [texte imprimé] / E. Tochigi, Auteur ; N. Shibata, Auteur ; A. Nakamura, Auteur . - 2010 . - pp. 208–215. Métallurgie Langues : Anglais (eng) in Acta materialia > Vol. 58 N° 1 (Janvier 2010) . - pp. 208–215 Mots-clés : Alumina  (α-Al2O3)  Grain  boundary  Dislocation  Stacking  fault  Transmission  electron  microscopy  (TEM) Résumé : An alumina (α-Al2O3) bicrystal with a {1 View the MathML source 0 0}/〈1 1 View the MathML source 0〉 2° low-angle grain boundary was fabricated by diffusion bonding, and the grain boundary was observed by high-resolution transmission electron microscopy (HRTEM). It was found that 1/3〈1 View the MathML source 0 0〉 partial-dislocation triplets were periodically arrayed along the boundary. The atomic structure within the {1 View the MathML source 0 0} stacking faults in between the partial-dislocation triplets was determined by HRTEM combined with first-principles calculations. We discuss the stacking fault structures and their excess energies in detail. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science/article/pii/S1359645409005941