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- Study on Particle Shape Control and Characterization of SUS316L Flake Powder Fabricated by Wet Milling Process
- Jae Hyeok Wi, Si Hong Ryu, Seong Eui Lee
- J Powder Mater. 2026;33(1):37-43. Published online February 28, 2026
- DOI: https://doi.org/10.4150/jpm.2026.00017
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Abstract
PDF - In this study, a particle shape control process was developed to fabricate flake-like SUS316L powders about 20 µm for application in semiconductor gas filters. The Flake powder was produced through a wet milling process using a Planetary Mill by varying the rotation speed, milling time, solvent, and polyvinylpyrrolidone (PVP) dispersant conditions. The fabricated powders were then characterized to evaluate their morphological and phase transformation behaviors. In the ethanol-based Planetary Milling process, as the rotation speed increased from 300, 400, 500 rpm, the powder morphology was observed to gradually change from spherical to flake-like due to the increase in milling energy. According to the XRD, as the rotation speed increased, a phase transformation from austenite to martensite occurred due to the increase in heat generation and collisions between the powder and balls. In addition, an increase in Full Width at Half Maximum (FWHM) was observed, indicating a decrease in crystallinity. Under different solvent and dispersant conditions, the addition of 5 wt% PVP to the deionized water (DI Water) solvent suppressed particle fracture and produced more uniform flake-like particles compared with the DI Water process without PVP. In addition, a smaller FWHM and reduced oxygen content were observed.
- [Korean]
- A Study on Pore Properties of SUS316L Powder Porous Metal Fabricated by Electrostatic Powder Coating Process
- Min-Jeong Lee, Yu-Jeong Yi, Hyeon-Ju Kim, Manho Park, Byoung-Kee Kim, Jung-Yeul Yun
- J Korean Powder Metall Inst. 2018;25(5):415-419. Published online October 1, 2018
- DOI: https://doi.org/10.4150/KPMI.2018.25.5.415
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- 1 Citations
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Abstract
PDF
Porous metals demonstrate not only excessively low densities, but also novel physical, thermal, mechanical, electrical, and acoustic properties. Thus, porous metals exhibit exceptional performance, which are useful for diesel particulate filters, heat exchangers, and noise absorbers. In this study, SUS316L foam with 90% porosity and 3,000 μm pore size is successfully manufactured using the electrostatic powder coating (ESPC) process. The mean size of SUS316L powders is approximately 12.33 μm. The pore properties are evaluated using SEM and Archimedes. As the quantity of powder coating increases, pore size decreases from 2,881 to 1,356 μm. Moreover, the strut thickness and apparent density increase from 423.7 to 898.3 μm and from 0.278 to 0.840 g/cm3, respectively. It demonstrates that pore properties of SUS316L powder porous metal are controllable by template type and quantity of powder coating.
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- Fabrication and Pore Characteristics of Metal Powder Filters with a Cross-Sealed Honeycomb Shape Using Material Extrusion Additive Manufacturing
Minji Kim, Min-Jeong Lee, Su-Jin Yun, Poong-Yeon Kim, Hyeon Ju Kim, Juyong Kim, Jung Woo Lee, Jung-Yeul Yun
Journal of Powder Materials.2025; 32(4): 299. CrossRef
- Fabrication and Pore Characteristics of Metal Powder Filters with a Cross-Sealed Honeycomb Shape Using Material Extrusion Additive Manufacturing
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