Publicación: Avaliação da Adição de Grafeno na Dureza e Tenacidade à Fratura de WC-10Co
Fecha
2024-10-22
Autores
dos Santos Rosa, Jhonatan Dantas
Rodrigues das Neves, Daniele
Filgueira, Marcello
Bertolete, Marcelo
Alves Barbosa, Patrícia
Editor/a
Director/a
Tutor/a
Coordinador/a
Prologuista
Revisor/a
Ilustrador/a
Derechos de acceso
info:eu-repo/semantics/openAccess
Título de la revista
ISSN de la revista
Título del volumen
Editor
Universidad Nacional de Educación a Distancia (España), Universidad de Concepción - Chile. Departamento de Ingeniería Mecánica
Resumen
O metal duro (WC-Co) é um produto da metalurgia do pó que exibe excelente combinação de dureza e tenacidade à fratura. Este trabalho objetiva avaliar a influência da adição de grafeno na densificação, dureza e tenacidade à fratura de WC-10Co. Para tanto, 0,1% em massa de grafeno com poucas camadas (FLG) foi adicionada em mistura de pós ultrafino e fino de WC e Co, respectivamente. As amostras foram sinterizadas por corrente elétrica pulsada (SPS) a 1400ºC, com pressão uniaxial de 40 MPa e atmosfera em baixo vácuo. Foram avaliadas a densidade, a dureza Vickers e a tenacidade à fratura (KIC). Os resultados mostraram pouca influência do grafeno na densificação e na dureza. Todavia, houve aumento estatisticamente significativo de 14,9% no KIC ao comparar com a amostra de referência. Conclui-se que o grafeno tem potencial para a melhoria de propriedades, porém as condições de sinterização precisam ser ajustadas.
Cemented carbide (WC-Co) is a powder metallurgy product that exhibits an excellent combination of hardness and fracture toughness. This work aims to evaluate the influence of graphene addition on the densification, hardness and fracture toughness of WC-10Co. For this purpose, 0.1% by weight of few-layer graphene (FLG) was added to a mixture of ultrafine and fine powders of WC and Co, respectively. The samples were sintered by spark plasma sintering (SPS) at 1400ºC, with uniaxial pressure of 40 MPa and a low vacuum atmosphere. Density, Vickers hardness and fracture toughness (KIC) were evaluated. The results showed little influence of graphene on densification and hardness. However, there was a statistically significant increase of 14.9% in KIC compared to the reference sample. It is concluded that graphene can potentially improve properties, but the sintering conditions need to be adjusted.
Cemented carbide (WC-Co) is a powder metallurgy product that exhibits an excellent combination of hardness and fracture toughness. This work aims to evaluate the influence of graphene addition on the densification, hardness and fracture toughness of WC-10Co. For this purpose, 0.1% by weight of few-layer graphene (FLG) was added to a mixture of ultrafine and fine powders of WC and Co, respectively. The samples were sintered by spark plasma sintering (SPS) at 1400ºC, with uniaxial pressure of 40 MPa and a low vacuum atmosphere. Density, Vickers hardness and fracture toughness (KIC) were evaluated. The results showed little influence of graphene on densification and hardness. However, there was a statistically significant increase of 14.9% in KIC compared to the reference sample. It is concluded that graphene can potentially improve properties, but the sintering conditions need to be adjusted.
Descripción
Organizado y patrocinado por: Federación iberoamericana de Ingeniería Mecánica y Universidad de Concepción - Chile. Departamento de Mecánica, FeIbIm – FeIbEM
Categorías UNESCO
Palabras clave
metal duro, grafeno, dureza Vickers, tenacidade à fratura, cemented carbide, graphene, Vickers hardness, fracture toughness
Citación
-
Centro
E.T.S. de Ingenieros Industriales
Departamento
Mecánica