Crystal growth of high performance giant magnetostriction alloys by using micro-pulling down method
| Project/Area Number |
24560905
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Metal making engineering
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| Research Institution | Tohoku University |
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Principal Investigator |
OIKAWA Katsunari 東北大学, 工学(系)研究科(研究院), 教授 (70356608)
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2013: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2012: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Keywords | 超磁歪 / 単結晶 / ミクロ組織 / 偏析 / 磁歪材料 / 結晶方位 |
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| Outline of Final Research Achievements |
Fe2(Dy0.73Tb0.27) alloys have been received great attention as vibration-powered generator materials. In this study, the fiber shape single crystals of Fe2(Dy0.73Tb0.27) alloys were prepared by the micro-pulling-down method. Optimum conditions for the crystal growth, the solidification behavior and physical properties of them were investigated. As the results, the single crystal wires approximately 2 mm in diameter could be grown by 30mm/h pulling-down-rate using CaO crucible under Ar+6%H2 atomspherre. The effective distribution coefficient of them approximately is unit, suggesting that the macroscopic segregation is very small. The saturation magnetostriction increases with increasing the annealing temperature although the crystals annealed higher than 1173 K were broken. In addition, Zr additions increase the saturation magnetization. The sample annealed at 1173 K showed the maximum saturation magnetization about 1900ppm.
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Report
(4 results)
Research Products
(2 results)
