Artículo
Probing the Mechanical Properties of Porous Nanoshells by Nanoindentation
Valencia, Felipe J.; Aurora, Viviana; Ramirez, Max; Ruestes, Carlos Javier
; Prada, Alejandro; Varas, Alejandro; Rogan, José
![Icon](/themes/CONICETDigital/images/conicet.png)
Fecha de publicación:
06/2022
Editorial:
MDPI
Revista:
Nanomaterials
ISSN:
2079-4991
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
In this contribution, we present a study of the mechanical properties of porous nanoshells measured with a nanoindentation technique. Porous nanoshells with hollow designs can present attractive mechanical properties, as observed in hollow nanoshells, but coupled with the unique mechanical behavior of porous materials. Porous nanoshells display mechanical properties that are dependent on shell porosity. Our results show that, under smaller porosity values, deformation is closely related to the one observed for polycrystalline and single-crystalline nanoshells involving dislocation activity. When porosity in the nanoparticle is increased, plastic deformation was mediated by grain boundary sliding instead of dislocation activity. Additionally, porosity suppresses dislocation activity and decreases nanoparticle strength, but allows for significant strain hardening under strains as high as 0.4. On the other hand, Young’s modulus decreases with the increase in nanoshell porosity, in agreement with the established theories of porous materials. However, we found no quantitative agreement between conventional models applied to obtain the Young’s modulus of porous materials.
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Articulos(ICB)
Articulos de INSTITUTO INTERDISCIPLINARIO DE CIENCIAS BASICAS
Articulos de INSTITUTO INTERDISCIPLINARIO DE CIENCIAS BASICAS
Citación
Valencia, Felipe J.; Aurora, Viviana; Ramirez, Max; Ruestes, Carlos Javier; Prada, Alejandro; et al.; Probing the Mechanical Properties of Porous Nanoshells by Nanoindentation; MDPI; Nanomaterials; 12; 12; 6-2022; 1-15
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