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Vol.51, No.2, 105 ~ 112, 2013
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| Title |
| Effect of Sintering Temperature on the Microstrutcure and Magnetic Properties of Fe-6.5% Si Alloy Fabricated by Metal Injection Molding |
| 최대엽 Dae Yeob Choi , 후세인시아리프 Husein Syarif , 신동혁 Dong Hyuk Shin , 고영건 Young Gun Ko |
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| Abstract |
| 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℃. 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℃. 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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| Key Words |
| metals, sintering, metal injection molding, magnetic properties, scanning electron microscopy |
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