/..... 1) 2012, /.,. 1.1% (2010).,..,......, 1%.., (HEV), (EV). 2-4),,., 90 [(BH) max]60.,. Fig. 1. N48 Nd-Fe-B 50
Alnico 9 1/54., Nd-Fe-B. HEV, EV,,... Dy Fig. 2. 5-7) Dy, Fig. 1.. Fig. 2....,,.,. Nd-Fe-B Fe60%, Nd30%, Dy. 8) Dy. Dy 4.8 ppm Au (0.004 ppm) Pt (0.01 ppm) Nd (25 ppm).,.. Nd-Fe-B..,. /.. Fig. 3. Nd-Fe-B 1/10 2. Nd-Fe-B. 2 2 Nd-Fe-B (VCM). 2006 2 5. 1 2 51
Fig. 3.. Nd-Fe-B 5 Nd-Fe-B. Nd-Fe-B.,., Nd-Fe-B. Nd 1 mm., NC.. Nd-Fe-B.. 1981 1990 DC.. 2003 Nd. Nd 30%.,. Nd CO 2. 2009. 48 6 Sm-Co... /. Nd-Fe-B. MW 250-600 kg Nd-Fe-B. 2030 300 GW. Nd-Fe-B. Nd-Fe-B Nd-Fe-B., 1 70 150, HEV 1 1kg, EV 1 2kg Nd-Fe-B., 52
Fig. 4. Nd.., (EB) EB 1 0.35 kg Nd-Fe-B. 2012 EB 9,700. MRI Nd-Fe-B. MRI 5% Nd., CD, DVD.,.,. HEV 200 Nd-Fe-B 1/3 (Fig. 4). Nd-Fe-B 25 koe. Dy Tb. Fig. 5 Dy ( Tb), HEV, EV 7-10 wt%, 4-5 wt%. Dy, Tb DyNd 10-20%, Tb Fig. 5. Nd Dy. Nd 2-4%., 1. HEV, EV Nd-Fe-B. Nd-Fe-B Nd, Dy, Tb 30 wt%. Nd20 wt%, Dy10 wt% Dy Tb Nd.. 9-12) 53
(Br) (Hc).,.,. Nd 250. 200. 200.... Dy.. H c = H A - N eff M s (1) H c : Coercive force strength H A : Anisotropy magnetic field M s : Saturation magnetization : Factor which relates to the microstructure N eff : Effective demagnetization field (1) H A Ms. Nd 2Fe 14B 2-14-1 Tb Dy.. Nd.. Dy Nd 2Fe 14B Nd Dy Fe Dy (BH) max.,.,. (1). Dy. Fig. 6.. HDDR,,., Melt spun. Dy., (, )., Dy Dy, Dy Dy. Nd-Fe-B... 54
Fig. 6. Nd-Fe-B (a), (b). Nd, /. 13-18) (Dy),. --,,. 3.1., Nd-Fe-B.... 1m.... Nd. PLP (PressLess Process). Nd-rich. PLP. PLP. PLP Fig. 7., 5 Tesla. Fig. 7. Pressless process. 55
,.. 2. 3-4 m 1 m 1.5 m Nd-Fe-B. Dy Tb 20 koe.. Dy. ()., Nd-Fe-B Nd 2Fe 14B Nd-rich., Nd-rich. Nd-rich. Nd-rich. 3.2. HDDR 19-27) Hono Group 19.6 koe. Hono Group, (1) Nd 2Fe 14B, (2) Nd-rich. Nd-Fe-B.... HDDR. Fig. 8. Nd-rich. Nd-rich HDDR. HDDR. Nd 2Fe 14B NdH 2, Fe, Fe 2B Nd 2Fe 14B. 100 m 250 Fig. 8. HDDR. Nd2Fe14B NdH2, Fe, Fe2B. Nd2Fe14B. 250 nm. 56
nm.,., Nd-rich. Nd-rich.., Dy Tb Hono group Nd-rich. Nd-rich Ndrich. Nd-rich. Nd-rich. Hono group Dy Tb Nd. HDDR Nd-Fe-B Nd-Cu. Nd-Cu 520.. Nd. Nd-Cu 600, Nd. Nd-rich Cu. Nd-Cu Cu. Hono group... HEV/EV 25 koe, 35 MGOe Nd-Fe-B. 3.3. Melt spun ribbon Nd-Fe-B (Meltspun Method Meltspinning Method). Nd. nm. Nd.,. (Hot deformation). radial ring [NEOQUENCH-DR]. Fig. 9. Hot pressing Die upsetting ( Back extrusion). Melt spun 700~800. Fig. 9. Melt spun Hot deformation. 57
Spark Plasma Sintering (SPS). hot pressing.. (Fig. 10)., GBDP (Grain boundary diffusion process) (17)., Hitachi HDDR. 3.4.. Dy Tb,, TDK (Fig. 11). Nd-Fe-B TDK 2011. Dy Tb. Nd-Fe-B Dy Tb. ( ). Nd-Fe-B. Dy Tb. 200 HEV Nd 40 %. Dy Tb Nd 2Fe 14B Nd Dy Tb. R 2Fe 14B (R ) R Nd Dy Tb. Dy Tb Nd-Fe-B. 4-5 m Nd 2Fe 14B () () Nd-rich., Nd-rich. Dy Tb Fig. 10. Melt spun 3. Fig. 11. Dy. 58
. Nd- Fe-B Dy Tb Dy Tb. Dy Tb. Nd-Fe-B,... Dy Tb.. Dy Tb., Dy Tb Dy Tb. TDK,. Dy H- HAL TDK. Dy. Dy Dy. m 1m Dy Dy Dy Dy-rich. TDK Dy, 2 koe....,.,.. Dy., Dy, 2035.,.,,. Nd 2014, /. / 30 Nd-Fe-B 1. 59
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