Synthesis of resource saving Fe-based semi-hard magnetic material by controlling of nano-crystal structure
| Project/Area Number |
25600037
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Nanomaterials engineering
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| Research Institution | Tohoku University |
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Principal Investigator |
MAKINO Akihiro 東北大学, 金属材料研究所, 教授 (30315642)
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| Project Period (FY) |
2013-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2014: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2013: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Keywords | 金属物性 / 半硬質磁性 / 組織制御 / 粒成長 |
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| Outline of Final Research Achievements |
Development and magnetic properties of an alloy that can change from very soft to semi-hard magnetic are reported. We found that as quenched ribbons of Fe75.3Pt8B12P4Cu0.7 alloy are amorphous by X-ray. Heat treatment in the temperature range of 400-450 ℃ causes formation of many a-Fe grains in the amorphous matrix. Hard magnetic L10 FePt grains appear at 520 ℃. This alloy shows a high saturation magnetic flux density [Bs >1.55 T] along with the ability to vary coercivity (Hc) from 25 A/m to 11000 A/m. The ability to control magnetic properties lies in a precise control over the soft and hard magnetic phases, which are strongly exchange coupled.
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Report
(3 results)
Research Products
(11 results)
