Microencapsulation of metal powders for preventing detonation and dust in their production and conversion. III. The kinetics of gas evolution

Efremov, O. V.; Neikov, Oleg D.; Rabin, P. B.; Salomatkina, M. F.

doi:10.1007/bf00795867

Cited by 1 publication

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“…To examine the kinetics of gas emission, we used an original system that applies a force to balance the pressure of the gas accumulated under the measuring dome [7]. The experimental procedure allows for the peculiarities of the alloy powders used and is based on the following principles.…”

Section: Methodsmentioning

confidence: 99%

Hydrodynamic particle-size classification of aluminum alloy powders

Neikov

Odokienko

Vasileva

et al. 2009

Powder Metall Met Ceram

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UDC 621.762Powder fractionation is an essential part of powder metallurgy processes. However, powder particles smaller than 40 μm can hardly be classified. Meshes with openings smaller than 40 μm are not used in conventional sieving because of very low effectiveness since powder is suspended above the sieve as a result of vibration, which makes it difficult for the particles to pass through the mesh. Powders with particles smaller than 40 μm can be fractionated by hydroclassification. The hydroclassification of aluminum alloy powders and distribution of powder particle sizes are studied, and efficient hydroclassification methods are developed. Water-atomized aluminum powders and alloys have not been produced until recently because of the explosion hazard as hydrogen releases when aluminum interacts with water. A method is proposed for the hydroclassification and, thus, fractionation of powders over a wide range of particle sizes, including those smaller than 40 μm, beginning with 0-10 μm.

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Section: Methodsmentioning

confidence: 99%