Please use this identifier to cite or link to this item: https://repositorio.ufrn.br/handle/123456789/31606
Title: Production of nickel matrix composites reinforced with carbide particles by granulation of fine powders and mechanical pressing
Authors: Martinelli, Antonio Eduardo
Fernandes, Maria Roseane P.
Klein, Aloisio Nelmo
Hammes, Gisele
Binder, Cristiano
Nascimento, Rubens Maribondo do
Keywords: Powder granulation;Nickel;Tantalum carbide;Niobium carbide;Metal matrix composite
Issue Date: Jan-2017
Publisher: Elsevier
Citation: FERNANDES, Maria Roseane P.; MARTINELLI, Antonio Eduardo; KLEIN, Aloisio Nelmo; HAMMES, Gisele; BINDER, Cristiano; NASCIMENTO, Rubens M.. Production of nickel matrix composites reinforced with carbide particles by granulation of fine powders and mechanical pressing. Powder Technology, [S.L.], v. 305, p. 673-678, jan. 2017. Elsevier BV. http://dx.doi.org/10.1016/j.powtec.2016.10.053. Disponível em: https://www.sciencedirect.com/science/article/abs/pii/S003259101630746X?via%3Dihub. Acesso em: 20 jan. 2021.
Portuguese Abstract: Plain nickel and nickel composites containing either TaC or NbC powders were granulated and sintered after conventional mechanical pressing. The granulation parameters were studied using plain nickel powder to evaluate a binder system consisting of paraffin diluted in hexane, but also the suitable size range of the granules obtained Carbide powders were then wet mixed with nickel and the powder mixtures were granulated using a drum. Flow rate tests were performed and the granules were pressed into pellets, which were dewaxed and sintered. SEM images of the microstructure of the sintered materials were obtained. Green and sintered densities along with Brinell hardness were also evaluated. The results revealed that the concentration of 1.5 wt% of paraffin and granules sieved in the range between 500 and 90 μm contributed towards the development of dense and uniform microstructures of the sintered composites. Finally, the addition of carbides homogeneously increased hardness to nearly double that of plain nickel
URI: https://repositorio.ufrn.br/handle/123456789/31606
ISSN: 1873-328X
Appears in Collections:CT - DEMAT - Artigos publicados em periódicos

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