Atomization Using a Pressure-Gas-Atomizer

Achelis, Lydia; Uhlenwinkel, Volker; Lagutkin, Stanislav; Sheikhaliev, Sh. M.

doi:10.4028/www.scientific.net/msf.534-536.13

Cited by 6 publications

(4 citation statements)

References 3 publications

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“…In the simulation, the gas atomisation pressure varied between 2 and 4 MPa to ascertain its influence on the mean particle diameter as shown in Figure 11(a). Consistent with the findings from other works [49–51], the D 50 was found to decrease with increasing gas pressure (Figure 11(a)). Simulation with a gas pressure of 2.99 MPa (the same as in the experiment) resulted in a D 50 of 41.57 µm that is also close to the experimentally obtained D 50 value of 35 µm.…”

Section: Resultssupporting

confidence: 92%

“…When the gas-to-melt mass flow rate ratio (GMR) increases, atomised droplets are also accelerated, which leads to a decrease in final particle size [50,51]. Under a constant gas pressure, the mean particle diameter increases linearly with the melt mass flow rate because of the reduced impact of the gas pressure and its attendant slower acceleration of the droplets.…”

Section: Influencing Factors On the Final Particle Size And Powder Mi...mentioning

confidence: 99%

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Numerical analysis of droplet breakup, cooling, and solidification during gas atomisation

et al. 2023

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As gas atomisation has been the main method for producing high-performance spherical powders in the past decades, its application in the production of metallic powders has become one of the main research subjects in this field. Since it is challenging to directly observe the atomising gas and to investigate melt flow states by experiments, numerical simulation is attracting increasing interest in studying the gas atomisation process. In this work, various computational fluid dynamics models were implemented to simulate the gas atomisation process. With the models, the droplet breakup, cooling, and solidification within the coupled process were investigated. The final mean particle size was predicted through numerical simulations and compared with the statistics extracted from the gas atomisation process, which shows that a reasonable mass median diameter of the particle can be predicted numerically. The results also show a clear relationship between the breakup trajectory and the resulting particle size.

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Section: Resultssupporting

confidence: 92%

Section: Influencing Factors On the Final Particle Size And Powder Mi...mentioning

confidence: 99%

Numerical analysis of droplet breakup, cooling, and solidification during gas atomisation

et al. 2023

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“…In spray forming, different atomization techniques can be used to disintegrate the melt into individual droplets. The most common atomization processes are free-fall and close-coupled atomizers, but also other atomizers have already been used in spray forming processes [19,[51][52][53][54][55][56][57][58][59]. The aim of atomization is to increase the surface-to-volume-ratio of the melt and this is governed by the specific process/ product requirements.…”

Section: Droplets In Flightmentioning

confidence: 99%

Bulk synthesis of amorphous and nano‐crystalline materials by spray forming

Srivastava

Ellendt

Meyer

et al. 2014

Materialwissenschaft Werkst

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Bulk amorphous and nano‐crystalline metallic materials have been observed to possess excellent mechanical and physical properties. The conventional process routes, to synthesize such materials, are restricted by their ability to achieve rapid solidification, which limits the dimensions of the materials produced. In the last 10–12 years, spray forming has been employed to avoid these limitations by using its capability of layer by layer deposition of undercooled droplets. The current literature indicates that the opportunities provided by this process can be effectively utilized to produce bulk materials in a single step. In this paper, an attempt has been made to bring out the developments in the synthesis of bulk amorphous and/or nano‐crystalline materials by spray forming. The effect of process parameters, droplet size distribution in the atomized spray, the thermal conditions of droplets prior to deposition and the deposition surface conditions have been discussed. It has been demonstrate that a layer by layer deposition of undercooled droplets of glass forming alloys on a relatively cold deposition surface is the suitable condition to achieve bulk amorphous/nano‐crystalline materials.

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“…As the second step a gas-ring-atomizer is used to disintegrate the molten metal film, ligaments, and any large droplets. This idea results in a patent published in 2002 (Uhlenwinkel, 2002) and initiated intensive investigations (Lagutkin et al, 2003b(Lagutkin et al, , 2004bAchelis et al, 2006Achelis et al, , 2008Achelis et al, , 2009). The hollow cone film/spray is surrounded by the gas-ringatomizer.…”

Section: Principlementioning

confidence: 99%