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http://dx.doi.org/10.4150/KPMI.2004.11.6.528

Microstructure and Sintering Behavior of Injection Molded Fe Sintered Body Using Rapid Thermal Heating Process  

Kim Ki-Hyun (Division of Advanced Materials Engineering, Kongiu National University)
Han Jae-Kil (Division of Advanced Materials Engineering, Kongiu National University)
Yu Ji-Hun (Korea Institute of Machinery and Material)
Choi Chul-Jin (Korea Institute of Machinery and Material)
Lee Byong-Taek (Division of Advanced Materials Engineering, Kongiu National University)
Publication Information
Journal of Powder Materials / v.11, no.6, 2004 , pp. 528-534 More about this Journal
Abstract
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 $700^{\circ}C,$ 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 $700^{\circ}C,$ 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.
Keywords
Fe nanopowder; Injection molding process; Rapid thermal annealing;
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