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°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.

• Keywords: Fe nanopowder;Injection molding process;Rapid thermal annealing;