resumo
Cemented carbides are highly resistant to abrasion, erosion and sliding wear and are frequently used in drilling and cutting tool operations. In the present investigation, different submicrometric (0.8 mu m) WC (tungsten carbide)-based composites were developed, containing various binders of Co, Ni, NiCr, NiMo, and NiCrMo. The main objective of the work was simultaneous tribological and electrochemical characterization to investigate the mechanisms of surface degradation when subjected to mechanical wear and how they interconnect with chemical or electrochemical processes and each other. By comparison with previous tribological tests, under dry sliding and the same contact conditions of load and frequency, it can be concluded that a synergistic effect was not observed and that the solution works mainly as lubrication, resulting in increased combined wear-corrosion resistance.
palavras-chave
CEMENTED CARBIDES; ANODIC POLARIZATION; CORROSION BEHAVIOR; EROSION-CORROSION; ABRASIVE WEAR; TRIBOCORROSION; CO; HARDMETALS; RESISTANCE; STRENGTH
categoria
Engineering
autores
Pereira, P; Vilhena, L; Sacramento, J; Senos, A; Malheiros, L; Ramalho, A
nossos autores
Ana Maria de Oliveira e Rocha Senos
Colaborador
Pedro Pereira
Estudante de doutoramentoGrupos
G2 - Materiais Fotónicos, Eletrónicos e Magnéticos
G3 - Materiais Eletroquímicos, Interfaces e Revestimentos
Projectos
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
P. Pereira acknowledges FCT for financial support (SFRH/BD/138040/2018). This work was developed within the scope of the project CICECO-Aveiro Institute of Materials, UIDB/50011/2020, UIDP/50011/2020 & LA/P/0006/2020, financed by national funds through the FCT/MEC (PIDDAC). Furthermore, we acknowledge HARDTECH-POCI-01-0247-FEDER-045283, financed by FEDER under the PT2020 Partnership Agreement. This research was sponsored by national funds through FCT-Fundacao para a Ciencia e a Tecnologia under the project UIDB/00285/2020.