resumo
WC-based composites are extremely resistant to wear and corrosion; they are used in numerous mechanical applications (e.g., pumps, valves, mechanical seals, flow control technology, etc.). They are generally produced by sintering tungsten carbide with a metal binder (cobalt is the most common). However, Co is part of the 2017 list of 27 critical raw materials with a high supply-risk and economic importance to which reliable and unhindered access is a concern for European industry and value chains. This paper aims at the mechanical and tribological characterization, by reciprocating sliding wear experiments and scratch tests, of new and innovative cemented carbide grades that contribute to the reduction/substitution of critical materials like the Co binder. It was found that Co plays an important role in the wear behaviour of hardmetals. On the other hand, the composites developed present wear rates close (although higher) to WC-Co, constituting valid alternatives for wear parts.
palavras-chave
DRY SLIDING FRICTION; WEAR BEHAVIOR; WC/CO; CO; ABRASION; RESISTANCE; MECHANISMS; CERAMICS; CARBIDES; CONTACT
categoria
Engineering; Materials Science
autores
Pereira, P; Vilhena, LM; Sacramento, J; Senos, AMR; Malheiros, LF; Ramalho, A
nossos autores
Ana Maria de Oliveira e Rocha Senos
ColaboradorProjectos
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). This work was developed within the scope of the project HARDTECH-POCI-01-0247-FEDER-045283, financed by FEDER under 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 and LA/P/0112/2020.