Artículo
Electrochemically exfoliated graphene-like nanosheets for use in ceramic nanocomposites
Autor/es | Poyato Galán, Rosalía
Verdugo, Reyes Muñoz Ferreiro, Carmen Gallardo López, Ángela María |
Departamento | Universidad de Sevilla. Departamento de Física de la Materia Condensada |
Fecha de publicación | 2020 |
Fecha de depósito | 2022-01-18 |
Publicado en |
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Resumen | In this work, the synthesis of graphene-like nanosheets (GNS) by an electrochemical exfoliation method, their microstructural characterization and their performance as fillers in a ceramic matrix composite have been assessed. ... In this work, the synthesis of graphene-like nanosheets (GNS) by an electrochemical exfoliation method, their microstructural characterization and their performance as fillers in a ceramic matrix composite have been assessed. To fabricate the composites, 3 mol % yttria tetragonal zirconia (3YTZP) powders with 1 vol % GNS were processed by planetary ball milling in tert-butanol to enhance the GNS distribution throughout the matrix, and densified by spark plasma sintering (SPS). According to a thorough Raman analysis and SEM observations, the electrochemically exfoliated GNS possessed less than 10 graphene layers and a lateral size lower than 1 μm. However, they contained amorphous carbon and vacancy-like defects. In contrast the GNS in the sintered composite exhibited enhanced quality with a lower number of defects, and they were wavy, semi-transparent and with very low thickness. The obtained nanocomposite was fully dense with a homogeneous distribution of GNS into the matrix. The Vickers hardness of the nanocomposite showed similar values to those of a monolithic 3YTZP ceramic sintered in the same conditions, and to the reported ones for a 3YTZP composite with the same content of commercial graphene nanosheets. |
Identificador del proyecto | PGC 2018-101377-B-100 |
Cita | Poyato Galán, R., Verdugo, R., Muñoz Ferreiro, C. y Gallardo López, A.M. (2020). Electrochemically exfoliated graphene-like nanosheets for use in ceramic nanocomposites. Materials, 13 (11), 2656. |
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Electrochemically Exfoliated.pdf | 3.185Mb | [PDF] | Ver/ | |