- Microstructural Feature of Full-densified W-Cu Nanocomposites Containing Low Cu Content
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Jai-Sung Lee, Sung-Soo Jung, Joon-Phil Choi, Geon-Yong Lee
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J Powder Mater. 2013;20(2):138-141.
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DOI: https://doi.org/10.4150/KPMI.2013.20.2.138
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- The microstructure evolution during sintering of the W-5 wt.%Cu nanocomposite powders was investigated for the purpose of developing a high density W-Cu alloy. The W-5 wt.%Cu nanopowder compact, fully-densified during sintering at 1623 K, revealed a homogeneous microstructure that consists of high contiguity structures of W-W grains and an interconnected Cu phase located along the edges of the W grains. The Vickers hardness of the sintered W-5 wt.%Cu specimen was 427pm22 Hv much higher than that (276pm19 Hv) of the conventional heavy alloy. This result is mostly due to the higher contiguity microstructure of the W grains compared to the conventional W heavy alloy.
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Citations
Citations to this article as recorded by  - Evolution of microstructure and wear-friction behavior of W-30 wt.% Cu nanocomposite produced via a mechanochemical synthesis route
K. Zangeneh-madar, H. Abbaszadeh, E. Salahshour-rad, S. Seyyedin, M. Ahangarkani
International Journal of Materials Research.2020; 111(6): 491. CrossRef - In-situ synthesis of tungsten nanoparticle attached spherical tungsten micro-powder by inductively coupled thermal plasma process
Chulwoong Han, Hyunwoong Na, Yonghwan Kim, Hanshin Choi
International Journal of Refractory Metals and Hard Materials.2015; 53: 7. CrossRef
- Sintering Behavior of Fe Nanopowder Agglomerates Prepared by Pressureless Compaction
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Woo-Kyung You, Sung-Soo Jung, Jai-Sung Lee
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J Korean Powder Metall Inst. 2008;15(4):271-278.
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DOI: https://doi.org/10.4150/KPMI.2008.15.4.271
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- Sintering behavior of iron nanopowder agglomerate compact prepared by slurry compaction method was investigated. The Fe nanopowder agglomerates were prepared by hydrogen reduction of spray dried agglomerates of ball-milled Fe_2O_3 nanopowder at various reduction temperatures of 450°C, 500°C and 550°C, respectively. It was found that the Fe nanopowder agglomerates produced at higher reduction temperature have a higher green density compact which consists of more densified nanopowder agglomerates with coarsed nanopowders. The sintering behavior of the Fe nanopowder agglomerates strongly depended on the powder packing density in the compact and microstructure of the agglomerated nanopowder. It was discussed in terms of two sintering factors affecting the entire densification process of the compact.
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Citations
Citations to this article as recorded by - A Feasibility Study on the Surface Hardening of Sintered Iron Nanopowder by Plasma Ion Nitriding
Joon-Chul Yun, Jai-Sung Lee
Journal of Korean Powder Metallurgy Institute.2012; 19(1): 13. CrossRef - Low temperature powder injection molding of iron micro-nano powder mixture
Woo-Kyung You, Joon-Phil Choi, Su-Min Yoon, Jai-Sung Lee
Powder Technology.2012; 228: 199. CrossRef
- Synthesis of Tungsten Heavy alloy Nanocomposite Powder by Ultrasonic-milling Process
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Seung-Chul Lee, Chang-Woo Lee, Sung-Soo Jung, Berm-Ha Cha, Jai-Sung Lee
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J Korean Powder Metall Inst. 2007;14(2):101-107.
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DOI: https://doi.org/10.4150/KPMI.2007.14.2.101
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- Ultrasonic-milling of metal oxide nanopowders for the preparation of tungsten heavy alloys was investigated. Milling time was selected as a major process variable. XRD results of metal oxide nanopowders ultrasonic-milled for 50 h and 100 h showed that agglomerate size reduced with increasing milling time and there was no evidence of contamination or change of composition by impurities. It was found that nanocomposite powders reduced at 800°C in a hydrogen atmosphere showed a chemical composition of 93.1W-4.9Ni-2.0Fe from EDS analysis. Hardness of sintered part using 50 h and 100 h powder samples was 399 Hv and 463 Hv, respectively, which is higher than the that of commercial products (330-340 Hv).
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Citations
Citations to this article as recorded by - Grinding behavior of WO3, NiO, Fe2O3 by ultrasonic milling parameters control and preparation of nanocomposite powder
Keunhyuk Ryu, Kun-Jae Lee
Advanced Powder Technology.2020; 31(9): 3867. CrossRef - Investigation on Size Distribution of Tungsten-based Alloy Particles with Solvent Viscosity During Ultrasonic Ball Milling Process
KeunHyuk Ryu, HyeongSub So, JiSeok Yun, InHo Kim, Kun-Jae Lee
Journal of Korean Powder Metallurgy Institute.2019; 26(3): 201. CrossRef
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