Coarsening by network restructuring in model nanoporous gold / Kedarnath Kolluri in Acta materialia, Vol. 59 N° 20 (Décembre 2011)  

Public ISBD [article]  inActa materialia > Vol. 59 N° 20 (Décembre 2011) . - pp 7645–7653 Titre : Coarsening by network restructuring in model nanoporous gold Type de document : texte imprimé Auteurs : Kedarnath Kolluri, Auteur ; Michael J. Demkowicz, Auteur Année de publication : 2012 Article en page(s) : pp 7645–7653 Note générale : Métallurgie Langues : Anglais (eng) Mots-clés : Coarsening Foams Nanoporous metals Modeling Résumé : Using atomistic modeling, we show that restructuring of the network of interconnected ligaments causes coarsening in a model of nanoporous gold. The restructuring arises from the collapse of some ligaments onto neighboring ones and is enabled by localized plasticity at ligaments and nodes. This mechanism may explain the occurrence of enclosed voids and reduction in volume in nanoporous metals during their synthesis. An expression is developed for the critical ligament radius below which coarsening by network restructuring may occur spontaneously, setting a lower limit to the ligament dimensions of nanofoams. ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science/article/pii/S1359645411006148 [article] Coarsening by network restructuring in model nanoporous gold [texte imprimé] / Kedarnath Kolluri, Auteur ; Michael J. Demkowicz, Auteur . - 2012 . - pp 7645–7653. Métallurgie Langues : Anglais (eng) in Acta materialia > Vol. 59 N° 20 (Décembre 2011) . - pp 7645–7653 Mots-clés : Coarsening Foams Nanoporous metals Modeling Résumé : Using atomistic modeling, we show that restructuring of the network of interconnected ligaments causes coarsening in a model of nanoporous gold. The restructuring arises from the collapse of some ligaments onto neighboring ones and is enabled by localized plasticity at ligaments and nodes. This mechanism may explain the occurrence of enclosed voids and reduction in volume in nanoporous metals during their synthesis. An expression is developed for the critical ligament radius below which coarsening by network restructuring may occur spontaneously, setting a lower limit to the ligament dimensions of nanofoams. ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science/article/pii/S1359645411006148

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