resumo
Material extrusion (MEX) allows for the production of advanced cutting tools with new internal cooling systems, which are suitable for new machining equipment. To produce cutting tools via this process, hardmetal and cermet feedstock must be prepared for the extrusion of 3D printing filaments. After shaping the 3D object (green), debinding and sintering must be performed to achieve densification. Defects and microstructural heterogeneities were studied according to the powder material. The present study shows that, although MEX is a viable solution for hardmetals, it needs to produce homogeneous filaments for cermets. The WC-Co bulk microstructures versus hardness were similar to the ones that were measured with pressing and sintering. While cermet (Ti(CN)/WC-Ni/Co) microstructures were heterogeneous, their hardness, when compared with that from the pressing and sintering manufacturing process, decreased significantly.
categoria
Chemistry; Materials Science; Metallurgy & Metallurgical Engineering; Physics
autores
Oliveira, G; Senos, A; Fernandes, C; Figueiredo, D; Vieira, T
nossos autores
Ana Maria de Oliveira e Rocha Senos
Colaborador
Cristina Maria da Silva Fernandes
ColaboradorGrupos
G2 - Materiais Fotónicos, Eletrónicos e Magnéticos
G3 - Materiais Eletroquímicos, Interfaces e Revestimentos
Projectos
Manufatura aditiva de compósitos de base cerâmica para componentes mecânicos (3DCompCer)
CICECO - Aveiro Institute of Materials (UIDB/50011/2020)
CICECO - Aveiro Institute of Materials (UIDP/50011/2020)
Associated Laboratory CICECO-Aveiro Institute of Materials (LA/P/0006/2020)
agradecimentos
This research was sponsored with FEDER funds through COMPETE, Programa Operacional Factores de Competividade, 3DCompcer (POCI-01-0247-FEDER-047060); with national funds through FCT-Fundacao para a Ciencia e a Tecnologia-under the project UIDB/00285/2020; and via LA/P/0112/2020 and Centro2020 through PAMI-ROTEIRO/0328/2013 (no. 022158). This work was also developed within the scope of the project CICECO-Aveiro Institute of Materials, UIDB/50011/2020, UIDP/50011/2020, and LA/P/0006/2020, which was financed by national funds through the FCT/MCTES (PIDDAC).