2017 Fiscal Year Final Research Report
Development of high-coercivity nanocrystalline NeFeB films deposited by Supersonic Free-Jet PVD
| Project/Area Number |
15K06512
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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 |
Material processing/Microstructural control engineering
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| Research Institution | Shibaura Institute of Technology |
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Principal Investigator |
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Keywords | ナノ結晶永久磁石 / 保磁力 / 最大エネルギ積 / 成膜速度 |
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| Outline of Final Research Achievements |
Nd-Fe-B based magnets show the highest maximum energy product among all the permanent magnets. In this work, NdFeB thick films were prepared on substrates by supersonic free-jet physical vapor deposition (SFJ-PVD). The SFJ-PVD has been developed as a new coating method in which a coating film is formed by the deposition of nanoparticles onto a substrate at very high velocity. The SFJ-PVD can deposit almost all the evaporated source material as nanoparticles and produce thick coating film.
Using SFJ-PVD technique, we obtain a uniform high-density NdFeB films. Thickness up to 165 μm of NdFeB films have a poly-nanocrystalline structure with a grain size of 5-30 nm. Coercivities up to 154 kA/m and saturation magnetization of about 50 emu/g were achieved.
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| Free Research Field |
材料加工処理
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