- Consolidation of Iron Nanopowder by Nanopowder-Agglomerate Sintering at Elevated Temperature
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Jai-Sung Lee, Joon-Chul Yun, Joon-Phil Choi, Geon-Yong Lee
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J Powder Mater. 2013;20(1):1-6.
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DOI: https://doi.org/10.4150/KPMI.2013.20.1.001
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- The key concept of nanopowder agglomerate sintering (NAS) is to enhance material transport by controlling the powder interface volume of nanopowder agglomerates. Using this concept, we developed a new approach to full density processing for the fabrication of pure iron nanomaterial using Fe nanopowder agglomerates from oxide powders. Full density processing of pure iron nanopowders was introduced in which the powder interface volume is manipulated in order to control the densification process and its corresponding microstructures. The full density sintering behavior of Fe nanopowders optimally size-controlled by wet-milling treatment was discussed in terms of densification process and microstructures.
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Citations
Citations to this article as recorded by  - Influence of the initial powder characteristic on the densified tungsten microstructure by spark plasma sintering and hot isostatic pressing
Ji Young Kim, Eui Seon Lee, Youn Ji Heo, Young-In Lee, Jongmin Byun, Sung-Tag Oh
Powder Metallurgy.2023; 66(5): 644. CrossRef - Sintering behavior of bimodal iron nanopowder agglomerates
Jun‐ll Song, Geon‐Yong Lee, Eui‐Jin Hong, Carolline S. Lee, Jai‐Sung Lee
Journal of the American Ceramic Society.2019; 102(6): 3791. CrossRef - Fabrication of YAG : Er3+powders for the single crystal growth according to the synthetic temperature and flux concentration
Cheol Woo Park, Suk Hyun Kang, Jae Hwa Park, Hyun Mi Kim, Jae Sang Choi, Hyo Sang Kang, Kwang Bo Shim
Journal of the Korean Crystal Growth and Crystal Technology.2015; 25(4): 166. CrossRef - Consolidation of Hierarchy-Structured Nanopowder Agglomerates and Its Application to Net-Shaping Nanopowder Materials
Jai-Sung Lee, Joon-Phil Choi, Geon-Yong Lee
Materials.2013; 6(9): 4046. CrossRef
- A Feasibility Study on the Surface Hardening of Sintered Iron Nanopowder by Plasma Ion Nitriding
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Joon-Chul Yun, Jai-Sung Lee
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J Korean Powder Metall Inst. 2012;19(1):13-18.
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DOI: https://doi.org/10.4150/KPMI.2012.19.1.013
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- This study has been performed on the full density sintering of Fe nanopowder and the surface hardening by plasma ion nitriding. The Fe sintered part was fabricated by pressureless sintering of the Fe nanopowder at 700°C in which the nanopowder agglomerates were controlled to have 0.5-5 µm sized agglomerates with 150 nm Fe nanopowders. The green compact with 46% theoretical density(T.D.) showed a homogeneous microstructure with fine pores below 1 µm. After sintering, the powder compact underwent full densification process with above 98%T.D. and uniform nanoscale microstructure. This enhanced sintering is thought to be basically due to the homogeneous microstructure in the green compact in which the large pores are removed by wet-milling. Plasma ion nitriding of the sintered part resulted in the formation of gamma'-Fe_4N equilibrium phase with about 12 µm thickness, leading to the surface hardening of the sintered Fe part. The surface hardness was remarkably increased from 176 H_v for the matrix to 365 H_v.
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Citations
Citations to this article as recorded by - Sintering behavior of bimodal iron nanopowder agglomerates
Jun‐ll Song, Geon‐Yong Lee, Eui‐Jin Hong, Carolline S. Lee, Jai‐Sung Lee
Journal of the American Ceramic Society.2019; 102(6): 3791. CrossRef - Densification and microstructural development during sintering of powder injection molded Fe micro–nanopowder
Joon-Phil Choi, Hyun-Gon Lyu, Won-Sik Lee, Jai-Sung Lee
Powder Technology.2014; 253: 596. CrossRef
- Trend in Research and Development Related to Sm-Fe-N Bonded Magnets
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Jung-Goo Lee, Hun Kwak, Chul-Jin Choi, Joon-Chul Yun, Jai-Sung Lee
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J Korean Powder Metall Inst. 2009;16(1):1-8.
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DOI: https://doi.org/10.4150/KPMI.2009.16.1.001
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Citations to this article as recorded by - Advanced Magnetic Actuation: Harnessing the Dynamics of Sm2Fe17–xCuxN3 Composites
Kangmo Koo, Young-Tae Kwon, Ji Young Park, Yong-Ho Choa
ACS Applied Materials & Interfaces.2024; 16(9): 11872. CrossRef
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