2011 Fiscal Year Final Research Report
Mn-Ga based Hard Magnets with High Coercivity and Ductility
| Project/Area Number |
22656149
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Single-year Grants |
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| Research Field |
Structural/Functional materials
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| Research Institution | Tohoku University |
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Principal Investigator |
KAINUMA Ryosuke 東北大学, 大学院・工学研究科, 教授 (20202004)
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| Co-Investigator(Renkei-kenkyūsha) |
UMETSU Rie 東北大学, 金属材料研究所, 助教 (60422086)
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| Project Period (FY) |
2010 – 2011
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| Keywords | ハード磁石 / Mn合金 / 析出 / 磁場中時効 / 結晶磁気異方性 |
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| Research Abstract |
In this project, a rare-earth metal-free magnet is aimed to be developed in the Mn-Ga based alloy systems. Mn-Ga binary and Mn-Ga-X (X : Ni, Co, Cu)ternary phase diagrams have experimentally been determined in the beginning. It was found that the hcp phase suppressing appearance of the ferromagnetic D0_<22> phase exists at high temperatures in the wide composition range and that the situation is not improved by addition of the elements X. On the other hand, a Mn-Ga-Cu alloy showing a large coercivity of about 10kOe has been found.
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