Effect of Sintering Temperature on the Microstrutcure and Magnetic Properties of Fe-6.5%Si Alloy Fabricated by Metal Injection Molding
- Effect of Sintering Temperature on the Microstrutcure and Magnetic Properties of Fe-6.5%Si Alloy Fabricated by Metal Injection Molding
- 최대엽; 후세인시아리프; 신동혁[신동혁]; 고영건
- GRAIN-SIZE; DIFFUSION; BEHAVIOR; STEEL; MICROSTRUCTURE; MECHANISMS
- Issue Date
- KOREAN INST METALS MATERIALS
- KOREAN JOURNAL OF METALS AND MATERIALS, v.51, no.2, pp.105 - 111
- The present work demonstrated the influence of sintering temperature on the microstructure and magnetic properties of Fe-6.5%Si alloys fabricated via metal injection molding. The samples were sintered in an Ar atmosphere at three different temperatures, 1100, 1200, and 1300 degrees C. Microstructural observations of the sintered sample revealed that, with increasing sintering temperature, the average grain size of the ferrite phase increased, while the fraction of the micro pore decreased. These results were attributed to the increasing mobility of the grain boundaries. The hysteresis curves showed that the magnetic properties of the sintered samples as a soft magnet were enhanced with increasing sintering temperature since the saturation magnetization increased and the coercivity decreased, reaching the values of 1.22 tesla and 1.84 kA/m at 1300 degrees C. Moreover, the values of the magnetic hysteresis loss in the sintered samples gradually decreased with increasing sintering temperature due to both the fairly high densification and coarse grain size of the sintered sample.
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