Enhancing cutting tool durability: Exploration of Al2O3-SiCw-graphene composites fabricated by SPS for improved mechanical and scratch resistance

This study focuses on the fabrication and characterisation of Al2O3-SiCw-rGO composites sintered by spark plasma sintering (SPS) technique. The research is mainly focused on understanding the impact of varying graphene content (0.5, 1.0 and 1.5 vol %) on nanomechanical properties and scratch resista...

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Detalles Bibliográficos
Autores: Suárez, Marta, Benavente, Rut, Borrell, Amparo, Pérez Mas, Ana Matilde, Menéndez López, Rosa María, Gutiérrez-González, C. F., Fernández, Adolfo
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2024
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:dnet:digitalcsic_::df8d50c167cd8d9e4f470f783f046bb0
Acceso en línea:http://hdl.handle.net/10261/376663
Access Level:acceso abierto
Palabra clave:Graphene-ceramic
Spark plasma sintering
Scratch resistance
Cutting tools
Descripción
Sumario:This study focuses on the fabrication and characterisation of Al2O3-SiCw-rGO composites sintered by spark plasma sintering (SPS) technique. The research is mainly focused on understanding the impact of varying graphene content (0.5, 1.0 and 1.5 vol %) on nanomechanical properties and scratch resistance. Among the compositions investigated, the composite containing 0.5 vol% graphene showed superior mechanical properties. Specifically, it exhibited a hardness of ∼30 GPa, a fracture toughness of 10.5 MPa m1/2 and a flexural strength of ∼920 MPa. In addition, this composite showed remarkable scratch resistance compared to composites with a higher or lower graphene content. In addition to mechanical properties, the fabricated composites also exhibited high electrical conductivity. This characteristic is especially advantageous for electrical discharge machining (EDM) processes. The high electrical conductivity enables efficient machining of complex shapes by EDM, thereby reducing machining costs while ensuring accuracy and efficiency.

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