사출성형 된 Fe-50%Ni 소결체의 제조

Abstract

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℃, 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℃, the values of relative density and hardness were 98.5%, 294.4 Hv, respectively. The grain size of sintered bodies strongly depended on the sintering temperature. In both samples sintered at 600℃ and 900℃, the average grain sizes were about 150 nm and 500 nm in diameter, respectively.