| Project/Area Number |
07555271
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 試験 |
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| Research Field |
工業物理化学
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| Research Institution | Osaka University |
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Principal Investigator |
MACHIDA Ken-ichi Osaka Univ., Faculty of Engineering, Assoc.Prof., 工学部, 助教授 (00157223)
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| Co-Investigator(Kenkyū-buntansha) |
SAKAGUCHI Hiroki Tottori Univ., Faculty of Engineering, Assoc.Prof., 工学部, 助教授 (00202086)
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| Project Period (FY) |
1995 – 1996
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| Project Status |
Completed (Fiscal Year 1996)
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| Budget Amount *help |
¥6,600,000 (Direct Cost: ¥6,600,000)
Fiscal Year 1996: ¥1,700,000 (Direct Cost: ¥1,700,000)
Fiscal Year 1995: ¥4,900,000 (Direct Cost: ¥4,900,000)
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| Keywords | Rare Earth Intermetallic Compounds / Interstitial Metal Nitrides / Permanent Magnets / Bonded Magnets / Coercivity / Remanence / Maximum Energy Product / Photochemical Vapor Deposition |
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| Research Abstract |
Rare earth intermetallic compounds, Sm_2Fe_<17> (C,N) _x and Nd (Fe, M) _<12> (C,N) _x, were prepared by conventional melting method and were finely and uniformly ground up to a particle size below 3 mum by ball-milling in a hexane solution containing a surface active agent. Furthermore, the surface of Sm_2Fe_<17>N_x powders was coated and stabilized by the zinc metal produced from Zn (C_2H_5) _2 according to photochemical vapor deposition process. The resulting Zn/Sm_2Fe_<17>N_x powders showed high coercivity and remanence values to provide a big maximum energy product around 320 kJm^<-3>. It was demonstrated that the epoxy resin-bonded magnets produced from the Zn/Sm_2Fe_<17>N_x composite powders possessed high-performance permanent magnetic characteristics : (BH) max = -176kJm^<-3> and good resistivity for oxidation. Also, these magnets showed the less irreversible flux loss in magnetization even than the Sm_2 (Fe, Co) _<17>N_x ones, of which the stability was much improved by Co addition,
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