- Surface Roughness and Sintering Characteristics of Fe-8 wt%Ni Component Fabricated by PIM
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Berm-Ha Cha, Jai-Sung Lee
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J Korean Powder Metall Inst. 2009;16(5):342-350.
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DOI: https://doi.org/10.4150/KPMI.2009.16.5.342
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- Development of nanoparticulate materials technology is essential to processing of highly functional nanoparticulate materials and components with small and complex shape. In this paper, the effect of particle size on surface roughness and shrinkage of sintered Fe-8 wt%Ni nanopowder components fabricated by PIM were investigated. The Fe-8 wt%Ni nanopowder was prepared by hydrogen reduction of ball-milled Fe_2O_3-NiO powder. Feedstock of nanopowder prepared with the wet-milled powder was injection molded into double gear shaped part at 120°C. After sintering, the sintered part showed near full densified microstructure having apparently no porosity (98%T.D.). Surface roughness of sintered bulk using nanopowder was less than 815 nm and it was about seven times lower than 7 mum that is typically obtainable from a sintered part produced from PIM.
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Citations
Citations to this article as recorded by  - Opportunity and Challenges of Iron Powders for Metal Injection Molding
Abhijeet Premkumar Moon, Srinivas Dwarapudi, Kameswara Srikar Sista, Deepak Kumar, Gourav Ranjan Sinha
ISIJ International.2021; 61(7): 2015. 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 - 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 - Consolidation of Iron Nanopowder by Nanopowder-Agglomerate Sintering at Elevated Temperature
Jai-Sung Lee, Joon-Chul Yun, Joon-Phil Choi, Geon-Yong Lee
Journal of Korean Powder Metallurgy Institute.2013; 20(1): 1. CrossRef - Manufacturing of Micro Gas Bearing by Fe-Ni Nanopowder and Metal Mold Using LIGA
Soo-Jung Son, Young-Sang Cho, Dae-Jung Kim, Jong-Hyun Kim, Suk-Sang Chang, Chul-Jin Choi
Journal of Korean Powder Metallurgy Institute.2012; 19(2): 140. 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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