Icosahedral clustering with medium-range order and local elastic properties of amorphous metals / M. Wakeda in Acta materialia, Vol. 58 N° 11 (Juin 2010)  

Public ISBD [article]  inActa materialia > Vol. 58 N° 11 (Juin 2010) . - pp. 3963–3969 Titre : Icosahedral clustering with medium-range order and local elastic properties of amorphous metals Type de document : texte imprimé Auteurs : M. Wakeda, Auteur ; Y. Shibutani, Auteur Année de publication : 2011 Article en page(s) : pp. 3963–3969 Note générale : Métallurgie Langues : Anglais (eng) Mots-clés : Metallic glasses Medium-range order Elastic behavior Molecular dynamics simulations Résumé : The paper focuses on the relationship between icosahedral clustering with medium-range order in amorphous metals and local elastic properties. Using a Cu–Zr binary amorphous model constructed by rapid quenching in the framework of molecular dynamics simulations, Voronoi polyhedra analysis shows that the icosahedra are not randomly distributed in space, but form characteristic interpenetrating icosahedral clustering with medium-range order. It is shown that the center atoms of icosahedra within the highly developed interpenetrating icosahedral clusters have higher local elastic moduli than those of independently existing icosahedra and other polyhedra with lower coordination numbers. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science/article/pii/S1359645410001746 [article] Icosahedral clustering with medium-range order and local elastic properties of amorphous metals [texte imprimé] / M. Wakeda, Auteur ; Y. Shibutani, Auteur . - 2011 . - pp. 3963–3969. Métallurgie Langues : Anglais (eng) in Acta materialia > Vol. 58 N° 11 (Juin 2010) . - pp. 3963–3969 Mots-clés : Metallic glasses Medium-range order Elastic behavior Molecular dynamics simulations Résumé : The paper focuses on the relationship between icosahedral clustering with medium-range order in amorphous metals and local elastic properties. Using a Cu–Zr binary amorphous model constructed by rapid quenching in the framework of molecular dynamics simulations, Voronoi polyhedra analysis shows that the icosahedra are not randomly distributed in space, but form characteristic interpenetrating icosahedral clustering with medium-range order. It is shown that the center atoms of icosahedra within the highly developed interpenetrating icosahedral clusters have higher local elastic moduli than those of independently existing icosahedra and other polyhedra with lower coordination numbers. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science/article/pii/S1359645410001746

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