| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2015: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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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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