Microstructural evolution of composite 8 WC-(Co, Ni): effect of the addition of SiC
Carregando...
Data
Data de publicação
Autores IPEN
Orientador
Título da Revista
ISSN da Revista
Título do Volume
É parte de
É parte de
É parte de
Defect and Diffusion Forum
Exportar
Resumo
Tungsten carbide (WC) based cemented carbides, also called hardmetals, are a family of
composite materials consisting of carbide ceramic particles embedded in a metallic binder. They are
classified as metal matrix composites (MMCs) because the metallic binder is the matrix that holds
the bulk material together [1]. WC based composites are used in applications where a good
combination of hardness and toughness are necessary [2]. It is usual to add more components to
tailor the microstructure of the WC-(Co, Ni) system. The hardness for the cemented carbides based
on nickel, increases significantly because of the addition of reinforcements like SiC nano-whisker
[3]. In this work, the SiC was considered as an additional component for the composite WC-8(Co,
Ni). Four mixtures were prepared with SiC contents ranging from 0 to 3.0 wt%. These mixtures
were pressed (200 MPa) and green samples with 25.2 mm of diameter and 40 g were produced.
Sintering was carried out in Sinter-HIP furnace (20 bar). Two sintering temperatures were
investigated, i.e. 1380 and 1420ºC, and the sintering time considered was 60 minutes. The relative
density, hardness, linear and volumetric shrinkage were determined. Microstructural evaluation was
investigated by optical microscopy and scanning electron microscopy (SEM-FEG). The results
showed that the addition of SiC promoted higher densification and grain size growth. The hardness
was higher for samples with SiC, so solid solution hardening of the binder was more effective than
WC grain size growth.
Como referenciar
MIRANDA, FABIO; RODRIGUES, DANIEL; NAKAMOTO, FRANCISCO Y.; FRAJUCA, CARLOS; SANTOS, GIVANILDO A. dos; COUTO, ANTONIO A. Microstructural evolution of composite 8 WC-(Co, Ni): effect of the addition of SiC. Defect and Diffusion Forum, v. 371, p. 78-85, 2016. DOI: 10.4028/www.scientific.net/DDF.371.78. Disponível em: http://repositorio.ipen.br/handle/123456789/27371. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.