| Project/Area Number |
18K13986
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 26010:Metallic material properties-related
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| Research Institution | National Institute of Advanced Industrial Science and Technology |
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Principal Investigator |
Okada Shusuke 国立研究開発法人産業技術総合研究所, 材料・化学領域, 主任研究員 (90712480)
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| Project Period (FY) |
2018-04-01 – 2021-03-31
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| Project Status |
Completed (Fiscal Year 2020)
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| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2018: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
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| Keywords | 希土類磁石 / Sm-Fe-N / 還元拡散法 / TbCu7 / 希土類ー遷移金属合金 / 溶融塩 / 磁石 / 還元拡散 / 希土類 / 針状微粒子 |
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| Outline of Final Research Achievements |
In this study, we developed a new low-temperature reduction-diffusion process that enables the synthesis of rare earth-transition metal alloy powders by reduction-diffusion reaction even below the Ca melting point by adding molten salt to the reduction-diffusion method. Initially, the primary objective of this research was to synthesize needle-like rare earth-transition metal alloy powders, but in the course of the research, it was found that the metastable phase, TbCu7 type Sm-Fe, could be synthesized by the low-temperature reduction diffusion process. Furthermore, the synthesized TbCu7 type Sm-Fe particles were found to be single crystal particles. This study has revealed a new candidate for the magnet production process beyond Nd-Fe-B magnets.
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| Academic Significance and Societal Importance of the Research Achievements |
本研究により、新たな準安定相合金粉末の合成プロセスを開発することができた。さらには本プロセスで開発した粉末は主に単結晶粒子から構成されていることが明らかとなった。これは従来の準安定相合金合成プロセスにはない特徴である。本研究で開発した低温還元拡散法は特に高性能磁石材料合成への応用が期待できる。
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