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Nanoporous amorphous carbon with exceptional ultra-high strength

dc.contributor.authorCastillo-Castro, Daniel
dc.contributor.authorCorrea, Felipe
dc.contributor.authorAparicio, Emiliano
dc.contributor.authorAmigo, Nicolás
dc.contributor.authorPrada, Alejandro
dc.contributor.authorFigueroa, Juan
dc.contributor.authorGonzález, Rafael I.
dc.contributor.authorBringa, Eduardo
dc.contributor.authorValencia, F.
dc.date.accessioned2023-05-16T14:58:05Z
dc.date.available2023-05-16T14:58:05Z
dc.date.issued2023
dc.identifier.urihttp://repositorio.ucm.cl/handle/ucm/4791
dc.description.abstractNanoporous materials show a promising combination of mechanical properties in terms of their relative density; while there are numerous studies based on metallic nanoporous materials, here we focus on amorphous carbon with a bicontinuous nanoporous structure as an alternative to control the mechanical properties for the function of filament composition.Using atomistic simulations, we study the mechanical response of nanoporous amorphous carbon with 50% porosity, with sp3 content ranging from 10% to 50%. Our results show an unusually high strength between 10 and 20 GPa as a function of the %sp3 content. We present an analytical analysis derived from the Gibson–Ashby model for porous solids, and from the He and Thorpe theory for covalent solids to describe Young’s modulus and yield strength scaling laws extremely well, revealing also that the high strength is mainly due to the presence of sp3 bonding. Alternatively, we also find two distinct fracture modes: for low %sp3 samples, we observe a ductile-type behavior, while high %sp3 leads to brittle-type behavior due to high high shear strain clusters driving the carbon bond breaking that finally promotes the filament fracture. All in all, nanoporous amorphous carbon with bicontinuous structure is presented as a lightweight material with a tunable elasto-plastic response in terms of porosity and sp3 bonding, resulting in a material with a broad range of possible combinations of mechanical properties.es_CL
dc.language.isoenes_CL
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 Chile*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/cl/*
dc.sourceNanomaterials, 13(8), 1429es_CL
dc.subjectAmorphous carbones_CL
dc.subjectMolecular dynamicses_CL
dc.subjectPlasticityes_CL
dc.titleNanoporous amorphous carbon with exceptional ultra-high strengthes_CL
dc.typeArticlees_CL
dc.ucm.facultadFacultad de Ciencias de la Ingenieríaes_CL
dc.ucm.indexacionScopuses_CL
dc.ucm.indexacionIsies_CL
dc.ucm.urimdpi.com/2079-4991/13/8/1429es_CL
dc.ucm.doidoi.org/10.3390/nano13081429es_CL


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