Study on parameters for centrifugal atomization with atomizing molten zinc.

Halada, Kohmei; Suga, Hiroo

doi:10.2497/jjspm.37.398

Cited by 7 publications

(11 citation statements)

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“…The size distributions are similar, all curves are almost overlapping. This result is consistent with prior report by Halada and Suga 13 . Figure 8.…”

Section: Effects Of Atomising Disc Sizesupporting

confidence: 83%

“…This equation implies that droplet diameter decreases with angular speed. However, equation (1) does not include the effects of liquid flow rate, which will through disintegration mode changes affect the droplet size 12,13 . In 1981, Champagne and Anger 14 suggested the empirical equation (2) for predicting the median particle size from centrifugal atomisation, including the effects of liquid flow rate.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Process Parameters on Zinc Powder Produced by Centrifugal Atomisation

2017

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An experimental centrifugal atomiser was used to study the manufacture of zinc powder. Melt temperature, melt flow rate, rotating speed and diameter of the atomising disc, are operating parameters that were varied, and their effects on powder quality and yield were observed. The median particle size and the particle size distribution tended to be better, i.e. smaller and narrower, with increasing rotating speed, melting temperature, and atomising disc size. With decreasing melt flow rate, the median particle size decrease and the particle size distribution is similar, all curves are almost overlapping. The yield of zinc powder increased with rotating speed and disc size, and decreased with melt flow rate. Apparent densities of zinc powder were in the range from 1.65 to 2.51 g/cm 3 . In SEM micrographs most zinc particles were irregular in shape, and the particle structure was mainly cellular based on optical imaging after etching of a polished surface.

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“…The size distributions are similar, all curves are almost overlapping. This result is consistent with prior report by Halada and Suga 13 . Figure 8.…”

Section: Effects Of Atomising Disc Sizesupporting

confidence: 83%

Section: Introductionmentioning

confidence: 99%

Influence of Process Parameters on Zinc Powder Produced by Centrifugal Atomisation

2017

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“…However, Kusaka reported that if the disc is larger, the particle size distribution width D75/D25 will be wider as a result of the separation of droplets from the inner circumference of the disc, as well as the circumference of the disc itself. 4) The particle size distribution widths obtained in this study for disc diameters in the range of 20-40 mm are shown in Fig. 3, and we can assume that for discs larger than 40 mm, the particle size distribution width D75/D25 will be even greater.…”

Section: Relationship Between Disc Diameter and Particlementioning

confidence: 58%

“…These studies have shown that higher disc speeds are needed to produce smaller particles. [3][4][5] Moreover, experiments have been conducted using disc rotation speeds of R = 15,000-40,000 rpm, with the aim of efciently manufacturing particle sizes of approximately 50 μm. 6) Further, ne Sn-3Ag-0.5Cu powder particles of 45 μm or smaller containing oxygen at less than 100 ppm have been synthesized and could be applied to lead-free solder.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Lead-Free Solder Particles Using High-Speed Centrifugal Atomization

et al. 2017

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We investigated the relationships between the centrifugal force and the disc size and rotation speed during the production of ne particles. In this study, an empirical formula was developed with the goal of obtaining an average particle size of D50. Moreover, particle production was performed at a disc rotation speed of at least 100,000 rpm, which was greater than that reported in previous studies. Our results showed that with Sn-13 mass%Sb (called Sn-13Sb), the average particle size produced at a disc rotation speed of 115,000 rpm was 12.8 μm, with 96.5% of the particles smaller than 25 μm.

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“…Size distribution could be influenced by diameters of the rotating disk, revolution rates, and pouring rates of molten alloy during the centrifugal atomization process [5]. Considering the processing parameters of our equipment, it seems that the coarse powders were obtained because pouring rate was slightly high during atomization.…”

Section: Size Distribution and Morphology Of The Atomized Powdersmentioning

confidence: 94%

Characterization of centrifugally atomized Al-12Si-5Fe-3Cu-1Mg(wt%) alloy powder and extruded rod

et al. 1996

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The Al-12Si-5Fe-3Cu-lMg(wt%) alloy was rapidly solidified by centrifugal atomization. The microstructural characteristics of rapidly solidified powder and the microstructure changes with heat treatment were investigated in terms and related to powder size. The microstructures of the powder consisted of dendritic a-Al, eutectic phase, Cu-rich phase, and needle-like intermetallic compounds. These phases were much finer than that of ingot cast structure and the size decreased with increasing cooling rate. The X-ray diffraction of the atomized powders revealed the presence of non-equilibrium S-(AIFeSi) intermetallic phase. This phase appeared to transform to an equilibrium -(AlFeSi) phase by heating at temperatures above 470°C. The extruded rod which was hot extruded at 360 0 C with an extrusion ratio of 40:1 also revealed the presence of the P-(AIFeSi) intermetallic phase. Using DSC, the exothermic peak due to precipitation from the supersaturated a-Al matrix was observed in the range of 200-250 0 C during continuous heating of atomized powder, and the size of the peaks increased with decreasing powder size.

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Study on parameters for centrifugal atomization with atomizing molten zinc.

Cited by 7 publications

References 0 publications

Influence of Process Parameters on Zinc Powder Produced by Centrifugal Atomisation

Influence of Process Parameters on Zinc Powder Produced by Centrifugal Atomisation

Synthesis of Lead-Free Solder Particles Using High-Speed Centrifugal Atomization

Characterization of centrifugally atomized Al-12Si-5Fe-3Cu-1Mg(wt%) alloy powder and extruded rod

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