An investigation of the use of stearic acid as a process control agent in high-energy ball milling of Nb-Al and Ni-Al powder mixtures
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2001
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ADVANCED POWDER TECHNOLOGY 3 - INTERNATIONAL LATIN-AMERICAN CONFERENCE ON POWDER TECHNOLOGY, 2rd
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Resumo
High energy ball milling of powders involves successive events of fracture and welding
promoting mechanical alloying, fine and homogeneous dispersions could be attained. To minimize
excessive cold welding during milling of ductile particles, the so called process control agents
(PCAs) are added to the powder charges. These additives, mostly organic compounds, act as a
coating of the particles inhibiting welding. It is known that PCAs are a source of contamination, so
under this point of view its quantity much be the lowest possible. Moreover performing combustion
synthesis of a powder mixture with PCA requires a pretreatment during the heating for extracting
the PCA before reaction takes place, otherwise it can impair densification. In this work the use of
stearic acid as PCA in milling Nb-Al and Ni-Al powder mixtures was investigated. The aim was to
find a optimum quantity of that additive concerning milling action and decreased contamination.
Como referenciar
ROCHA, C.J.; LEAL NETO, R.M.; GONCALVES, V.S.; CARVALHO, L.L.; AMBROZIO FILHO, F. An investigation of the use of stearic acid as a process control agent in high-energy ball milling of Nb-Al and Ni-Al powder mixtures. In: ADVANCED POWDER TECHNOLOGY 3 - INTERNATIONAL LATIN-AMERICAN CONFERENCE ON POWDER TECHNOLOGY, 2rd, Nov. 26-28, 2001, Florianopolis, SC. Proceedings... p. 191-196. DOI: 10.4028/www.scientific.net/MSF.416-418.144. Disponível em: http://repositorio.ipen.br/handle/123456789/15344. 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.