resumo
Cobalt is the standard binder in tungsten carbide (WC) hardmetals due to its compatibility with the WC phase, resulting in composites with exceptional hardness and wear resistance. However, their corrosion resistance is not satisfactory in many applications, leading to the early deterioration and failure of tools and equipment. In this work, the corrosion of WC hardmetals with three alternative binders (FeCoNi, NiCrCoMo and NiCrMo) is compared with a benchmark WC-Co composite, using electrochemical techniques such as open circuit potential (OCP) monitoring, polarisation curves and electrochemical impedance spectroscopy (EIS), assisted by scanning electron microscopy (SEM).
palavras-chave
CO HARDMETALS; ANODIC POLARIZATION; MECHANICAL CHARACTERIZATION; ELECTROCHEMICAL-BEHAVIOR; CEMENTED CARBIDES; GRAIN-SIZE; NI; COMPOSITES; ADDITIONS; TOUGHNESS
categoria
Materials Science; Metallurgy & Metallurgical Engineering
autores
Rocha, AMF; Bastos, AC; Cardoso, JP; Rodrigues, F; Fernandes, CM; Soares, E; Sacramento, J; Senos, AMR; Ferreira, MGS
nossos autores
Alexandre Manuel Ferro Rocha
Estudante de doutoramento
Ana Maria de Oliveira e Rocha Senos
Colaborador
António Alexandre Cunha Bastos
Investigador Auxiliar
Cristina Maria da Silva Fernandes
Colaborador
João Pedro Veleirinho Cardoso
Estudante de doutoramento
Mário Guerreiro Silva Ferreira
Professor(a) Jubilado(a)Grupos
G2 - Materiais Fotónicos, Eletrónicos e Magnéticos
G3 - Materiais Eletroquímicos, Interfaces e Revestimentos
Projectos
HARDCorr - Desenvolvimento de metal duro com elevada resistência ao desgaste e à corrosão (HardCorr)
agradecimentos
This work is financed by Portugal 2020 through European Regional Development Fund (ERDF) in the frame of Operational Competitiveness and Internationalization Programme (POCI) and in the scope of the project HardCorr (POCI-01-0247-FEDER-003382). The work was developed within the scope of the project CICECO-Aveiro Institute of Materials, POCI-01-0145-FEDER-007679 (FCT Ref. UID/CTM/50011/2013), financed by national funds through the FCT/MEC and when appropriate co-financed by FEDER under the PT2020 Partnership Agreement.