Processes for production of high-purity metal powders

Antony, Leo V. M.; Reddy, Ramana G.

doi:10.1007/s11837-003-0153-4

Cited by 92 publications

(51 citation statements)

References 6 publications

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“…The main techniques for production of metal powders are: atomization processes, melt spinning, rotating electrode process (REP), mechanical and chemical processes [1,2]. Metal powders are characterized by their morphology and size of the formed particles.…”

Section: Introductionmentioning

confidence: 99%

Comparative Morphological and Crystallographic Analysis of Electrochemically- and Chemically-Produced Silver Powder Particles

Avramović

Pavlović

Maksimović

et al. 2017

Metals

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Silver powders chemically synthesized by reduction with hydrazine and those produced by electrolysis from the basic (nitrate) and complex (ammonium) electrolytes were examined by X-ray diffraction (XRD) and scanning electron microscopic (SEM) analysis of the produced particles. Morphologies of the obtained particles were very different at the macro level. The needle-like dendrites, as well as the mixture of irregular and regular crystals, were formed from the nitrate electrolyte, while the highly-branched pine-like dendrites with clearly noticeable spherical grains were formed from the ammonium electrolyte. The agglomerates of spherical grains were formed by reduction with hydrazine. In the particles obtained from the nitrate electrolyte, Ag crystallites were strongly oriented in the (111) plane. Although morphologies of Ag particles were very different at the macro level, the similarity at the micro level was observed between chemically-synthesized particles and those obtained by electrolysis from the ammonium electrolyte. Both types of particles were constructed from the spherical grains. This similarity at the micro level was accompanied by the similar XRD patterns, which were very close to the Ag standard with a random orientation of Ag crystallites. For the first time, morphologies of powder particles were correlated with their crystal structure.

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Section: Introductionmentioning

confidence: 99%

Comparative Morphological and Crystallographic Analysis of Electrochemically- and Chemically-Produced Silver Powder Particles

Avramović

Pavlović

Maksimović

et al. 2017

Metals

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“…One of the most important consumer properties of metal powders is the stability of their chemical compositions. Usually, for the production of powder metal wares, the content of the base metal in powder is 98-99 %, and powders of even higher purity are required for the production of wares with special properties [13,14]. The limiting content of impurities in powders is determined by their permissible content in the resulting product.…”

Section: Introductionmentioning

confidence: 99%

Peculiarities of Producing an Electrolytic Iron Powder from Rolling Manufacture Waste

Pinchuk¹,

Vnukov²,

Cheranev³

2019

ChChT

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The electrolytic iron powder with controlled shape and size of particles and required structural, physical and functional properties was synthesized. The electrolytic precipitation of dispersed iron was carried out using a steel soluble anode and a titanium cathode. Sulfate electrolyte was used; the shape of the cathode was a plate; the electrolysis time was 1 h. Experimental studies were carried out using correlation-regression analysis. The average particle size and morphology were determined using optical microscopy. Based on the results of the experiments, polynomial models that adequately describe the established relationships of the parameters studied were obtained. The most significant factors are the circulation rate of the electrolyte, the cathodic current density, and the concentration of iron vitriol in the electrolyte.

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“…In PREP, a rotating bar of feedstock is arced with gas plasma, and the molten metal is centrifugally atomized as it is flung off the bar. The molten metal droplets then cool into spherical powder particles [3].…”

Section: Table Of Contents Introductionintroductionmentioning

confidence: 99%

Properties of Metal Powders for Additive Manufacturing: A Review of the State of the Art of Metal Powder Property Testing

Cooke¹,

Slotwinski²

2012

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Processes for production of high-purity metal powders

Cited by 92 publications

References 6 publications

Comparative Morphological and Crystallographic Analysis of Electrochemically- and Chemically-Produced Silver Powder Particles

Comparative Morphological and Crystallographic Analysis of Electrochemically- and Chemically-Produced Silver Powder Particles

Peculiarities of Producing an Electrolytic Iron Powder from Rolling Manufacture Waste

Properties of Metal Powders for Additive Manufacturing: A Review of the State of the Art of Metal Powder Property Testing

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