Consecutive induction melting of nickel-based superalloy in electrode induction gas atomization

Feng, Shuangjiu; Xia, Min; Chen, Ge

doi:10.1088/1674-1056/26/6/060201

Cited by 14 publications

(9 citation statements)

References 17 publications

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“…The obtained particle size range is suitable for AMR systems. This may be due to the fact that the atomizing gas pressure in this study was set to 1.5-3.5 MPa, which is lower than the values used in conventional EIGA experiments for producing fine powder [25,26,27], in which the particle size is typically 100 µm or less [25,26,27,28,29]. Figure 3(a) shows a SEM image of surface for HoB 2 particles with 355-500 µm diameter.…”

Section: Resultsmentioning

confidence: 98%

Gas-atomized particles of giant magnetocaloric compound HoB2 for magnetic hydrogen liquefiers

Yamamoto,

Takeya,

Saito

et al. 2022

Preprint

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The processing of promising magnetocaloric materials into spheres is one of the important issues on developing high-performance magnetic refrigeration systems. In the present study, we achieved in producing spherical particles of a giant magnetocaloric compound HoB 2 by a cruciblefree gas atomization process, despite its high melting point of 2350 • C. The particle size distribution ranges from 100 to 710 µm centered at 212-355 µm with the highest yield of 14-20wt% of total melted electrode, which is suitable for magnetic refrigeration systems. The majority of the resulting particles are mostly spherical with no contamination during the processing, while unique microstructures are observed on the surface and inside. These spherical particles exhibit sharp magnetic transitions and huge magnetic entropy change of 0.34 J cm −3 K −1 for a magnetic field change of 5 T at 15.5 K. The high sphericality and the high magnetocaloric performance suggest that the HoB 2 gas-atomized particles have good potential as magnetic refrigerants for use in magnetic refrigerators for hydrogen liquefaction.

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Section: Resultsmentioning

confidence: 98%

Gas-atomized particles of giant magnetocaloric compound HoB2 for magnetic hydrogen liquefiers

Yamamoto,

Takeya,

Saito

et al. 2022

Preprint

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“…Four different argon pressures were designed in the experiments to observe the satellite formation and content, which were 2.5, 3.0, 3.5, and 4.0 MPa. We controlled the continuous metal melt metal flow, as shown in Figure 1 c, using specific process parameters, such as induction coil size and power supply, which could obtain fine powder yields [ 24 ], and all atomization parameters were set as 5 × 10 −3 Pa for equipment vacuum, 48 ± 1 kW for smelting power, and 1970 ± 5 K for heating temperature.…”

Section: Experimental and Simulation Methodsmentioning

confidence: 99%

Effect of Electrode Induction Melting Gas Atomization on Powder Quality: Satellite Formation Mechanism and Pressure

Xia

Wang

et al. 2023

Materials

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Electrode induction melting gas atomization (EIGA) is a wildly applied method for preparing ultra-clean and spherical metal powders, which is a completely crucible-free melting and atomization process. Based on several experiments, we found that although the sphericity of metal powders prepared by EIGA was higher than that of other atomization methods, there were still some satellite powders. To understand the formation mechanism of the satellite, a computational fluid dynamics (CFD) approach FLUENT and a discrete particle model (DPM) were developed to simulate the gas atomization process, and several EIGA experiments with different argon pressures (2.5–4.0 MPa) were designed. A numerical simulation of the gas-flow field verified the formation trajectory of satellites, and the Hall flow rate of the powder produced under different pressures was 13.3, 13.8, 15.6, and 16.8, which were consistent with the prediction of the numerical simulation. This study provides theoretical support for understanding the satellite formation mechanism and improving powder sphericity in the EIGA process.

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“…Meanwhile, the molten melt in CCGA is instantly broken down by impinging the gas atomizing jets after flowing out from the nozzle 32 . EIGA, on the other hand, uses electrode tip melting method to produce the molten melt for the gas atomization 33 . The common technique being employed is FFGA as it has flexible alloy and feedstock options.…”

Section: Working Principles Of Atomizationmentioning

confidence: 99%

“…32 EIGA, on the other hand, uses electrode tip melting method to produce the molten melt for the gas atomization. 33 The common technique being employed is FFGA as it has flexible alloy and feedstock options. However, FFGA usually produce wide particle-size distribution of powder in which its powders are not fine enough.…”

Section: Comparison Of Major Atomization Techniquesmentioning

confidence: 99%

Atomization of metal and alloy powders: Processes, parameters, and properties

Soong,

Lai,

Kay Lup

2023

AIChE Journal

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Additive manufacturing (AM) has been intensively studied over this decade due to the increasing demand of functional and precise materials in various industries. AM process leverages on the concept of layer by layer deposition or joining of a material at micro‐ or nano‐scale to produce the final products. As such, AM technology is widely used to manufacture products of complex geometries with high precision in a short time. As the quality and the performance of AM manufactured functional products depend on the quality and the cost of the atomized metal or alloy powder used, the use of powders of high size uniformity, high purity, high sphericity, high flowability, low cost, and no trapped gas bubble porosity is necessary. To this end, various metal production technologies were investigated and one of the popular technologies is atomization. This article reviewed the working principles of the various atomization technologies for the production of fine metal and alloy powders. The key atomization conditions discussed in this article include atomization type, material feed rate and temperature, atomizing fluid flow rate, type and temperature, cooling rate, and atomization pressure. In addition, several outlooks on the prospect and the optimization of atomization technologies were also discussed in this article.

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Consecutive induction melting of nickel-based superalloy in electrode induction gas atomization

Cited by 14 publications

References 17 publications

Gas-atomized particles of giant magnetocaloric compound HoB2 for magnetic hydrogen liquefiers

Gas-atomized particles of giant magnetocaloric compound HoB2 for magnetic hydrogen liquefiers

Effect of Electrode Induction Melting Gas Atomization on Powder Quality: Satellite Formation Mechanism and Pressure

Atomization of metal and alloy powders: Processes, parameters, and properties

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