- Microstructure and Sintering Behavior of Injection Molded Fe Sintered Body Using Rapid Thermal Heating Process
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Ki-Hyun Kim, Jae-Kil Han, Ji-Hun Yu, Chul-Jin Choi, Byong-Taek Lee
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J Korean Powder Metall Inst. 2004;11(6):528-534.
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DOI: https://doi.org/10.4150/KPMI.2004.11.6.528
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- Using the nano Fe powders having 50 nm in diameter, Fe compact bodies were fabricated by injec-tion molding process. The relationship between microstructure and material properties depending on the volume ratio of powder/binder and sintering temperature were characterized by SEM, TEM techniques. In the compact body with the volume percentage ratio of 45(Fe powder) : 55(binder), which was sintered at 700°C, the relative density was about 97%, and the values of volume shrinkage and hardness were about 66.3% and 242.0 Hv, respec-tively. Using the composition of 50(Fe powder) : 50(binder) and sintered at 700°C, the values of relative density, volume shrinkage and hardness of Fe sintered bodies were 73.3%,;47.6% and 152.8 Hv, respectively. They showed brittle fracture mode due to the porous and fine microstructure.
- Fabrication of Injection Molded Fe-50%Ni Sintered Bodies
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Ki-Hyun Kim, Hyeong-Chul Yoon, Chul-Jin Choi, Byong-Taek Lee
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J Korean Powder Metall Inst. 2004;11(6):472-476.
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DOI: https://doi.org/10.4150/KPMI.2004.11.6.472
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Abstract
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- The Fe-Ni compact bodies were fabricated using Fe-Ni mixed powders with 50 nm in diameter by injection molding process. The relationship between microstructure and material properties was characterized with respect to the volume ratio of powder/binder and sintering temperature with SEM and TEM. In the compact body having the volume percent ratio of 45(Fe-Ni) : 55(binder), which was sintered at 900°C the values of relative density and hardness were low about 97.7% and 277.1 Hv, respectively. Using the composition of 50(Fe Ni) : 50(binder) and sintered at 900°C, the values of relative density and hardness were 98.5%, 294.4 Hv, respec-tively. The grain size of sintered bodies strongly depended on the sintering temperature. In both samples sintered at 600°C and 900°C, the average grain sizes were about 150 nm and 500 nm in diameter, respectively.
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Citations
Citations to this article as recorded by  - Microstructure and High Temperature Oxidation Behaviors of Fe-Ni Alloys by Spark Plasma Sintering
Chae Hong Lim, Jong Seok Park, Sangsun Yang, Jung-Yeul Yun, Jin Kyu Lee
Journal of Korean Powder Metallurgy Institute.2017; 24(1): 53. CrossRef
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