Metal treatment – Stock – Magnetic
Patent
1983-07-25
1988-12-20
Sheehan, John P.
Metal treatment
Stock
Magnetic
75244, 75245, 75246, 420 83, 420121, 420581, H01F 104
Patent
active
047923687
ABSTRACT:
Magnetic materials comprising Fe, B, R (rare earth elements) and Co having a major phase of Fe-Co-B-R intermetallic compound(s) of tetragonal system, and sintered anisotropic permanent magnets consisting essentially of, by atomic percent, 8-30% R (at least one of rare earth elements inclusive of Y), 2-28% B, no less than 50% Co, and the balance being Fe with impurities. Those may contain additional elements M (Ti, Ni, Bi, V, Nb, Ta, Cr, Mo, W, Mn, Al, Sb, Ge, Sn, Zr, Hf) providing Fe-Co-B-R-M type materials and magnets.
REFERENCES:
patent: 2167240 (1939-07-01), Hensel
patent: 3560200 (1971-02-01), Nesbitt et al.
patent: 3684593 (1972-08-01), Benz et al.
patent: 4063970 (1977-12-01), Steingroever
patent: 4401482 (1983-08-01), Green et al.
patent: 4402770 (1983-09-01), Koon
patent: 4533408 (1985-08-01), Koon
IEEE Trans. on Magnetics., vol. MAG-18, No. 6, Nov. 1982, pp. 1448-1450, Koon et al, "Composition Dependence of the Coercive".
IEEE Trans. on Magnetics, vol. MAG-20, No. 5, part 2, Sep. 1984, pp. 1584-1589, Sagawa et al, "Permanent Magnet Materials . . . ".
Hadjipanaysis et al, "Electronic and Magnetic Properties of Rare-Earth-Transition-Metal Glasses", Sep. 27, 1979, pp. 101-107.
Croat, "Magnetic Hardening of Pr-Fe and Nd-Fe Alloys by Melt Spinning", J. Appl. Phys., Apr. 4, 1982, pp. 3161-3169.
"Powder Metallurgy-Applied Products (II)-Magnetic Materials", 1964.
Chikazumi et al, "Magnetic Body Handbook", 1975.
"Hard Magnetic Material", vol. 3, Magnetic Engineering Seminar, edited by Ida et al.
Kaneko et al, "Magnetic Materials", Nov. 1977.
"Magnetic Materials of Modern Age", edited by Mito-Kako-Gijutsu Kyokai, Jun. 5, 1981.
Chapter 14, "Handbook on the Physics and Chemistry of Rare Earths", vol. 2, Magnetic Properties of Intermetallic Compounds . . . , pp. 55-56, 155-161.
Neumann et al, "Line Start Motors Designed with Nd-Fe-B Permanent Magnets", pp. 77-89, May 1985.
Burzo, "Some New Results in the Field of Magnetism of Rare-Earth Compounds", pp. 1-17, and drawings, Mar. 1985.
Ormerod, "Processing and Physical Metallurgy of NdFeB and Other R.E. Magnets", Pre-Print, pp. 69-92, Oct. 1984.
Hadjipanayis et al, Final Technical Report: 0001AE, "Investigation of Crystalline Iron-Platinum Nickel and Amorphous Rare Earth . . . ", Mar. 15, 1983.
Koo, IEEE Transactions on Magnetics, vol. MAG-20, No. 5, Sep. 1984, "Partial Substitution of SM with Neodymium, Praseodymium, . . . ".
Givord, "Crystal Chemistry and Magnetic Properties of the R.sub.2 Fe.sub.14 B Family of Compounds", Pre-Print, pp. 131-142, Oct. 1984.
Lee, Appl. Phys. Lett. 46, vol. 8, Apr. 15, 1985, "Hot-Pressed Neodymium-Iron-Boron Magnets", pp. 790-791.
Chapter 15, "Handbook on the Physics and Chemistry of Rare Earths", vol. 2, 1979, Magnetostrictive RFe.sub.2 Intermetallic Compounds, pp. 231-241.
Greedan et al, Jour. of Solid State Chemistry, 6, 1975, "An Analysis of the Rare Earth Contribution to the Magnetic . . . ", pp. 387-395.
Lee, J. Appl. Phys., vol. 52, Mar. 1981, "The Future of Rare Earth-Transition Metal Magnets of Type RE.sub.2 TM.sub.17 ", pp. 2549-2553.
Ohashi, "Effects of Praseodymium Substitution of Precipitation Hardened Rare Earth Magnets", pp. 493-501, Jun. 1981.
J. J. Croat, "Permanent Magnet Properties of Rapidly Quenched Rare Earth-Iron Alloys", IEEE Trans. Mag., vol. MAG-18, No. 6, Nov. 1982, pp. 1442-1447.
R. K. Mishra, "Microstructure of Melt-Spun Neodymium-Iron-Boron Magnets", International Conference on Magnetism, 1985.
Koon et al, "Rare Earth Transition Metal Exchange Interactions in Amorphous (Fe.sub.0.82 B.sub.0.18).sub.0.9 R.sub.x La.sub.0.1-x Alloys", J. Appl. Phys., 53(3), Mar. 1982, pp. 2333-2334.
Koon et al, "Abstract: A New Class of Melt Quenched Amorphous Magnetic Alloys", J. Appl. Phys., 52(3), Mar. 1981, p. 2535.
Koon et al, "Magnetic Properties of Amorphous and Crystallized (Fe.sub.0.82 B.sub.0.18).sub.0.9 Tb.sub.0.55 La.sub.0.05 ", Appl. Phys. Lett., 39(10), Nov. 15, 1981, pp. 840-842.
Elmasry et al, "Substitution of Iron for Cobalt in Rare Earth Boride Permanent Magnets of the Type Co.sub.3n+5 Sm.sub.n+1 B.sub.2n ", Z. Metallkde, 1983, pp. 86-88.
El Marry et al, "Phase Equilibria in the Co-Sm-B System", J. Less Common Metals, Jan. 1984, pp. 165-170.
Topp, The Chemistry of the Rare Earth Elements, 1965, pp. 1-13.
Gschneidner et al, Handbook on the Physics and Chemistry of Rare Earths, vol. 2-Alloys and Intermetallics, 1979, pp. 259-294.
Croat, "Preparation and Coercive Force of Melt Spun Pr-Fe Alloys", Appl. Phys. Lett., 37(12), Dec. 15, 1980, pp. 1096-1098.
Ojima et al, "Magnetic Properties of a New Type of Rare-Earth Cobalt Magnets Sm.sub.2 (Co,Cu,Fe,M).sub.17 ", IEEE Trans. on Mag., Sep. 1977, pp. 1317-1319.
Nagel et al, "Influence of Cu Content on the Hard Magnetic Properties of Sm (Co,Cu) 2:17 Compounds", IEEE Tran. on Mag., Sep. 1978, pp. 671-673.
Stadelmaier, "The Neodymium-Iron Permanent Magnet Breakthrough", Mag. Mat. Prod. Assoc. Workshop, Atlanta, GA, Jan. 26, 1984.
Robinson, "Powerful New Magnet Material Formed", Science, Mar. 2, 1984.
Chalan et al, "Ternary (Ncl-Sm-Ggl)-Fe-B Systems", Dopov. Akad. Nauk URSR, Ser. A: Fiz.-Mat. Tekl. Nauki, 10, pp. 873-876, 1979.
NEOMAX-Neodymium-Iron Magnet, Sumitomo Special Metals Co. Ltd.-brochure.
Japanese High Technology, vol. 4, No. 5, Aug. 1984.
"Strongest Magnet Unveiled", Maunichi Daily News, Saturday, Jun. 4, 1983.
El Marry et al, "Magnetic Moments and Coercive Forces in Hexagonal Boride Homologous Series Co.sub.3n+5 R.sub.n+1 B.sub.2n with R=Gcl and Sm", Z. Metallkde, 1983, pp. 33-37.
Gupta et al, "Magnetization Process and Revised in Sm.sub.3 Co.sub.11 B.sub.4 ", J. of Mag. and Mag. Mat., 40 (1983), pp. 32-36.
Croat et al, "Pr-Fe and Nd-Fe Based Materials: A New Class of High-Performance Permanent Magnets", J. Appl. Phys., 55(6), Mar. 15, 1984, pp. 2078-2082.
Sagawa et al, "New Material for Permanent Magnets on a Base of Nd and Fe", J. Appl. Phys., 55(6), Mar. 15, 1984, pp. 2083-2087.
Habacoff et al, "Thermal and Magnetic Properties of Amorphous Pr.sub.x (Fe.sub.0.8 B.sub.0.2).sub.1-x ", J. Appl. Phys., 53(3), Mar. 1982, pp. 2255-2257.
Koon et al, "Crystallization of FeB Alloys with Rare Earths to Produce Hard Magnetic Materials", J. Appl. Phys., 55(6), Mar. 15, 1984, pp. 2063-2066.
Croat et al, "High Energy Product Nd-Fe-B Permanent Magnets", Appl. Phys. Lett., 44(1), Jan. 1, 1984, pp. 148-149.
Hadjipanayis et al, "New Iron-Rare-Earth Based Permanent Magnet Materials", Appl. Phys. Lett., 43(8), Oct. 15, 1983, pp. 797-799.
Stadelmaire et al, "Cobalt-Free and Samarium-Free Permanent Magnet Materials Based on an Iron-Rare Earth Boride", Sep. 1, 1983.
Herlst et al, "Relationships Between Crystal Structure and Magnetic Properties in Nd.sub.2 Fe.sub.14 B", Plvy. Rev. B, Apr. 1, 1984, pp. 4176-4178.
Givord et al, "Magnetic Properties and Crystal Structure of Nd.sub.2 Fe.sub.14 B", Solid State Comm., vol. 50, No. 6, pp. 497-499, 1984.
Senno et al, "Magnetic Properties of Sm-Co-Fe-Cu Alloys for Permanent Magnet Materials", Japan. J. Appl. Phys., vol. 14, 1975, pp. 1619-1620.
Melton et al, "An Electron Microscope Study of Sm-Co-Cu-Based Magnetic Materials with the Sm.sub.2 Co.sub.17 Structure", J. of Appl. Phys., vol. 48, No. 6, Jun. 1977, pp. 2608-2611.
Leamy et al, "The Structure of Co-Cu-Fe-Ce Permanent Magnets", IEEE Trans. on Mag., vol. Mag. 9, No. 3, Sep. 1973, pp. 205-209.
Fujimura Setsuo
Matsuura Yutaka
Sagawa Masato
Sheehan John P.
Sumitomo Special Metals Co. Ltd.
LandOfFree
Magnetic materials and permanent magnets does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Magnetic materials and permanent magnets, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetic materials and permanent magnets will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1908250