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    • 2. 发明申请
    • MAGNETIC MATERIAL AND PERMANENT MAGNET OF THE NdFeB TYPE
    • 磁性材料和钕铁硼TYPE持续时间
    • WO1997017709A1
    • 1997-05-15
    • PCT/EP1996004836
    • 1996-11-06
    • MAGNETFABRIK SCHRAMBERG GMBH & CO.GRIEB, Bernd
    • MAGNETFABRIK SCHRAMBERG GMBH & CO.
    • H01F01/057
    • H01F41/026H01F1/057
    • The invention concerns a magnetic material and a permanent magnet of the NdFeB type. Intrinsic and structure-dependent resistance to corrosion is brought about by the specific addition of additives such as Dy, Co, Nb, Al, Ga and Cu to the base alloy of NdFeb. For standard applications, an additional coating can be dispensed with. However, the material is also more insensitive to the media to be contacted during electroplating, for example, and can be coated easily. Improved temperature coefficients of the residual magnetism and, with a suitable choice of alloys, high coercive field intensities even at high temperatures permit use at above 200 DEG C. Owing to higher magnetic flux densities in the temperature range of up to 200 DEG C, the proven but more expensive Sm2(TM)17 materials can be replaced in a great many applications.
    • 本发明涉及一种磁性材料和NdFeB型的永久磁铁。 通过控制加入的添加剂,例如镝,钴,铌,铝,镓和Cu以钕铁硼的基础合金的固有微观结构和腐蚀引起的稳定性来实现的。 对于标准的应用程序可以与一个额外的涂层被分配。 但该材料也相比于例如 在电镀层不敏感的接触介质,并且可以以简单的方式进行涂覆。 剩磁和高,具有即使在高温下合金的矫顽力的合适的选择的改进的温度系数允许使用超过200℃。由于较高的磁通密度的,以在温度高达200℃可以证明,然而,更昂贵的SM2(TM)17的材料的各种应用中使用 更换。
    • 3. 发明申请
    • RARE EARTH ELEMENT-METAL-HYDROGEN-BORON PERMANENT MAGNET AND METHOD OF PRODUCTION
    • 稀土元素 - 金氢硼原子磁铁及其生产方法
    • WO1995021452A1
    • 1995-08-10
    • PCT/US1994011526
    • 1994-10-11
    • YBM TECHNOLOGIES, INC.
    • YBM TECHNOLOGIES, INC.BOGATIN, Jacob, G.BELOV, Andrey
    • H01F01/057
    • C22C32/00H01F1/0573H01F1/0577
    • A permanent magnet is provided which is comprised of, by atomic percent: 10-24 % R; 2-28 % boron, 0.1-18.12 % hydrogen; and balance being M. R is at least one element selected from La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y and Sc, and M is at least one metal selected from Fe, Co, Ni, Li, Be, Mg, Ae, Si, Ti, V, Cr, Mn, Cu, Zn, Ga, Ge, Zn, Nb, Mo, Ru, Rh, Pd, Ag, Sb, Te, Mf, Ta, W, Re, Os, Ir, Pt, Au, and Bi. A process for producing the rare earth element-metal-hydrogen boron magnets is also disclosed wherein the magnetic materials are treated in an atmosphere having partial pressures of hydrogen containing gas at temperatures below the phase transformation temperature of the rare earth element-metal hybrides prior to sintering.
    • 提供永磁体,其由原子百分比组成:10-24%R; 2-28%硼,0.1-18.12%氢; 余量为M.R为选自La,Ce,Pr,Nd,Pm,Sm,Eu,Gd,Tb,Dy,Ho,Er,Tm,Yb,Lu,Y和Sc中的至少一种元素,M为 选自Fe,Co,Ni,Li,Be,Mg,Ae,Si,Ti,V,Cr,Mn,Cu,Zn,Ga,Ge,Zn,Nb,Mo,Ru,Rh,Pd, Ag,Sb,Te,Mf,Ta,W,Re,Os,Ir,Pt,Au和Bi。 还公开了一种制备稀土元素 - 金属 - 氢硼磁体的方法,其中磁性材料在低于稀土元素 - 金属杂化物的相变温度的温度下在具有含氢气体分压的气氛中处理, 烧结。
    • 4. 发明申请
    • SHEET MAGNET HAVING MICROCRYSTALLINE STRUCTURE AND METHOD OF MANUFACTURING THE SAME, AND METHOD OF MANUFACTURING ISOTROPIC PERMANENT MAGNET POWDER
    • 具有微结构结构的片状磁体及其制造方法以及制造等离子体永磁体粉末的方法
    • WO1998018141A1
    • 1998-04-30
    • PCT/JP1997003725
    • 1997-10-16
    • SUMITOMO SPECIAL METALS CO., LTD.KANEKIYO, HirokazuHIROSAWA, Satoshi
    • SUMITOMO SPECIAL METALS CO., LTD.
    • H01F01/057
    • B82Y25/00H01F1/0571H01F1/0579
    • A sheet magnet having a residual magnetic flux density Br of not less than 10 kG, a cost performance equal to that of a hard ferrite magnet, and a thickness of 70-300 mu m contributing to the miniaturization and thinning of a magnetic circuit, and a method of manufacturing the same. When a molten alloy of a predetermined structure having a small content of a rare earth element is subjected to continuous casting using a cooling roll in a vacuum inert gas atmosphere of not more than 30 kPa at a predetermined peripheral speed of the roll, it turns into a crystalline structure substantially not less than 90 % of which comprises a FE3B type compound and a compound phase having a-Fe and Nd2Fe14B type crystalline structures compatible with the former. A continuous sheet magnet of 70-300 mu m in thickness comprising a microcrystalline structure of 10-50 nm in average crystal grain diameter having magnetic characteristics of iHc>/=2kOe, Br>/=10 kG and practically usable as a permanent magnet can be obtained. A sheet magnet which has heretofore been difficult to be industrially produced can be mass-produced at a low price by a simple method.
    • 具有不小于10kG的剩余磁通密度Br,与硬铁氧体磁体相同的成本性能和70-300μm的厚度的片状磁体有助于磁路的小型化和变薄,以及 其制造方法。 当使用稀土元素含量少的预定结构的熔融合金在辊的预定圆周速度下在不超过30kPa的真空惰性气体气氛中使用冷却辊进行连续铸造时,变成 基本上不小于90%的晶体结构包含FE3B型化合物和具有与前者相容的-Fe和Nd2Fe14B型结晶结构的化合物相。 具有70-300μm厚度的连续片状磁体,其包含具有iHc> / = 2kOe,Br> / = 10kG的磁特性并且实际上可用作永磁体的平均晶粒直径为10-50nm的微晶结构 得到。 迄今为止难以在工业上制造的片状磁体可以通过简单的方法以低价格批量生产。