Soft magnetic properties of Fe-based amorphous/nanocrystalline hybrid materials
| Autor: | Seungjin Nam, Hyunjoo Choi, Min Woo Lee, Dong-Yeol Yang, Kyeong-Sik Min, Hwi-Jun Kim, Jonggyu Jeon, Yeonjoo Lee, Yong Jin Kim, Teasuk Jang |
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| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Materials science Annealing (metallurgy) General Chemical Engineering 02 engineering and technology Coercivity 021001 nanoscience & nanotechnology 01 natural sciences Nanocrystalline material Amorphous solid Magnetization Residual stress 0103 physical sciences Composite material 0210 nano-technology Hybrid material Ball mill |
| Zdroj: | Powder Technology. 339:440-445 |
| ISSN: | 0032-5910 |
| Popis: | In this study, we investigated the effect of crystalline structures on the magnetic properties of the Fe-based amorphous powder. We intentionally produced uniformly dispersed nanocrystallites inside the Fe-based amorphous powder using a combined process of mechanical milling and thermal annealing. In the case of powder produced after 30 min of ball milling followed by annealing at 400 °C, coercivity was decreased by 96.88% from 3698.73 to 115.49 A/m, and magnetization was increased 2.60% from 1.92 × 10−4 to 1.97 × 10−4 Wbm/kg. The simultaneous improvement of coercivity and magnetization can be attributed to the homogeneous generation of a small number of nanocrystallites as well as the release of residual stress. |
| Databáze: | OpenAIRE |
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