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公开(公告)号：US06623541B2
公开(公告)日：2003-09-23
申请号：US09916255
申请日：2001-07-30
IPC分类号： C22C2912
CPC分类号： H01F1/0557 , Y10S428/90
摘要： A sintered rare earth magnet consisting essentially of 20-30% by weight of R (wherein R is Sm or a mixture of Sm and another rare earth element), 10-45% by weight of Fe, 1-10% by weight of Cu, 0.5-5% by weight of Zr, and the balance of Co has on its surface a composite layer containing Sm2O3 and/or CoFe2O4 in Co or Co and Fe. The magnet is resistant to hydrogen embrittlement.
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公开(公告)号：US20060213583A1
公开(公告)日：2006-09-28
申请号：US11340498
申请日：2006-01-27
CPC分类号： H01F1/0577 , B22F2009/041 , B22F2009/044 , B22F2998/00 , B22F2998/10 , C22C33/0278 , C22C38/005 , C22C2202/02 , H01F1/058 , H01F41/0266 , H01F41/0293 , B22F9/04 , B22F2201/02 , B22F2202/05 , B22F9/023 , B22F3/02 , B22F3/10
摘要： A rare earth permanent magnet is in the form of a sintered magnet body having a composition R1aR2bTcAdFeOfMg wherein F and R2 are distributed such that their concentration increases on the average from the center toward the surface of the magnet body, the concentration of R2/(R1+R2) contained in grain boundaries surrounding primary phase grains of (R1,R2)2T14A tetragonal system within the sintered magnet body is on the average higher than the concentration of R2/(R1+R2) contained in the primary phase grains, and the oxyfluoride of (R1,R2) is present at grain boundaries in a grain boundary region that extends from the magnet body surface to a depth of at least 20 μm. The invention provides R—Fe—B sintered magnets which exhibit high magnet performance despite minimal amounts of Tb and Dy used.
摘要翻译： 稀土永磁体是具有组成R 1的烧结磁体的形式，其中R 1，R 2，R 2， 其中F和R（R）其中F和R 分散使得它们的浓度从中心向磁体的表面的平均值增加，R 2的浓度（R 1> 1 / 包含在（R 1，R 2，R 2）2）的主相晶粒周围的晶界中所含的（SUP + + R 2） 烧结磁体中的四方晶系平均高于R 2 O 2的浓度（R 1→R 2 + SUP> 2），并且（R 1，R 2，R 2）的氟氧化物存在于晶界区域的晶界处 其从磁体表面延伸至至少20μm的深度。 本发明提供了尽管使用最少量的Tb和Dy，其表现出高磁性能的R-Fe-B烧结磁体。
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公开(公告)号：US20060213582A1
公开(公告)日：2006-09-28
申请号：US11340496
申请日：2006-01-27
CPC分类号： H01F1/0577 , H01F1/058 , H01F41/0266 , H01F41/0293
摘要： A functionally graded rare earth permanent magnet is in the form of a sintered magnet body having a composition R1aR2bTcAdFeOfMg wherein the concentration of R2/(R1+R2) contained in grain boundaries surrounding primary phase grains of (R1,R2)2T14A tetragonal system within the sintered magnet body is on the average higher than the concentration of R2/(R1+R2) contained in the primary phase grains, R2 is distributed such that its concentration increases on the average from the center toward the surface of the magnet body, the oxyfluoride of (R1,R2) is present at grain boundaries in a grain boundary region that extends from the magnet body surface to a depth of at least 20 μm, and the magnet body includes a surface layer having a higher coercive force than in the interior. The invention provides permanent magnets having improved heat resistance.
摘要翻译： 功能梯度稀土永磁体是烧结磁体的形式，具有组成R 1，B 2，B 2，B 2， 其中，在本发明的另一个实施方案中， 包含在（R 1）的主相晶粒周围的晶界中的R 2 O 2的浓度（R 1→R 2） 烧结磁体中的四方晶系平均高于R
2 /（R 1→R 2 + 2）是分布的，使得其浓度 从中心向磁体的表面平均增加，（R 1，R 2，R 2）的氟氧化物存在于晶界区域的晶界处， 从磁体表面延伸到至少20μm的深度，并且磁体包括具有较高矫顽力的表面层 比在室内。 本发明提供了具有改善的耐热性的永磁体。 -
公开(公告)号：US07488394B2
公开(公告)日：2009-02-10
申请号：US11340502
申请日：2006-01-27
CPC分类号： C22C38/005 , H01F1/0577 , H01F1/058 , H01F41/0266 , H01F41/0293
摘要： A rare earth permanent magnet is in the form of a sintered magnet body having a composition R1aR2bTcAdFeOfMg wherein F and R2 are distributed such that their concentration increases on the average from the center toward the surface of the magnet body, and grain boundaries having a concentration of R2/(R1+R2) which is on the average higher than the concentration of R2/(R1+R2) contained in primary phase grains of (R1,R2)2T14A tetragonal system form a three-dimensional network structure which is continuous from the magnet body surface to a depth of at least 10 μm. The invention provides R—Fe—B sintered magnets which exhibit a high coercive force.
摘要翻译： 稀土永久磁铁是具有组成R1aR2bTcAdFeOfMg的烧结磁体的形式，其中F和R2分布成使得它们的浓度从中心向磁体的平均值增加，并且具有浓度为 平均高于（R1，R2）2T14A四方晶系的主相晶粒中R2 /（R1 + R2）的浓度的R2 /（R1 + R2）的R2 /（R1 + R2）形成三维网状结构，该三维网状结构从 磁体表面深度至少为10um。 本发明提供了表现出高矫顽力的R-Fe-B烧结磁体。
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公开(公告)号：US07488393B2
公开(公告)日：2009-02-10
申请号：US11340498
申请日：2006-01-27
CPC分类号： H01F1/0577 , B22F2009/041 , B22F2009/044 , B22F2998/00 , B22F2998/10 , C22C33/0278 , C22C38/005 , C22C2202/02 , H01F1/058 , H01F41/0266 , H01F41/0293 , B22F9/04 , B22F2201/02 , B22F2202/05 , B22F9/023 , B22F3/02 , B22F3/10
摘要： A rare earth permanent magnet is in the form of a sintered magnet body having a composition R1aR2bTcAdFeOfMg wherein F and R2 are distributed such that their concentration increases on the average from the center toward the surface of the magnet body, the concentration of R2/(R1+R2) contained in grain boundaries surrounding primary phase grains of (R1,R2)2T14A tetragonal system within the sintered magnet body is on the average higher than the concentration of R2/(R1+R2) contained in the primary phase grains, and the oxyfluoride of (R1,R2) is present at grain boundaries in a grain boundary region that extends from the magnet body surface to a depth of at least 20 μm. The invention provides R—Fe—B sintered magnets which exhibit high magnet performance despite minimal amounts of Tb and Dy used.
摘要翻译： 稀土永磁体为具有组成R1aR2bTcAdFeOfMg的烧结磁体的形式，其中F和R2分布成使得它们的浓度从中心向磁体的平均值增加，R2 /（R1 包含在烧结磁体内的（R1，R2）2T14A四方晶系的主相晶粒周围的晶界中的+ R2）平均高于主晶粒中所含的R2 /（R1 + R2）的浓度， （R1，R2）的氟氧化物存在于从磁体表面延伸至至少20μm的深度的晶界区域的晶界处。 本发明提供了尽管使用最少量的Tb和Dy，其表现出高磁性能的R-Fe-B烧结磁体。
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公开(公告)号：US20060213585A1
公开(公告)日：2006-09-28
申请号：US11340521
申请日：2006-01-27
CPC分类号： H01F1/0577 , H01F1/058 , H01F41/0266 , H01F41/0293
摘要： A functionally graded rare earth permanent magnet having a reduced eddy current loss in the form of a sintered magnet body having a composition RaEbTcAdFeOfMg is obtained by causing E and fluorine atoms to be absorbed in a R—Fe—B sintered magnet body from its surface. F is distributed such that its concentration increases on the average from the center toward the surface of the magnet body, the concentration of E/(R+E) contained in grain boundaries surrounding primary phase grains of (R,E)2T14A tetragonal system is on the average higher than the concentration of E/(R+E) contained in the primary phase grains, the oxyfluoride of (R,E) is present at grain boundaries in a grain boundary region that extends from the magnet body surface to a depth of at least 20 μm, particles of the oxyfluoride having an equivalent circle diameter of at least 1 μm are distributed in the grain boundary region at a population of at least 2,000 particles/mm2, the oxyfluoride is present in an area fraction of at least 1%. The magnet body includes a surface layer having a higher electric resistance than in the interior. In the permanent magnet, the generation of eddy current within a magnetic circuit is restrained.
摘要翻译： 功能梯度稀土永磁体，其具有呈烧结磁体形式的具有减小的涡流损耗的组合物，其具有组成R a a B B C C 通过使E和氟原子被吸收在...中而获得。 R-Fe-B烧结磁体从其表面。 F的分布使得其浓度从磁体的中心向表面平均增加，包含在（R，E）2的主相晶粒周围的晶界中的E /（R + E）浓度 四方晶系平均高于主相晶粒中所含的E /（R + E）浓度，（R，E）的氟氧化物存在于 在从磁体表面延伸至至少20μm的深度的晶界区域中的晶界，具有至少1um的当量圆直径的氟氧化物颗粒至少分布在晶界区域 2,000颗粒/ mm 2，氟氧化物以至少1％的面积分数存在。 磁体包括具有比内部更高的电阻的表面层。 在永磁体中，抑制了磁路内的涡电流的产生。
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公开(公告)号：US07520941B2
公开(公告)日：2009-04-21
申请号：US11340496
申请日：2006-01-27
CPC分类号： H01F1/0577 , H01F1/058 , H01F41/0266 , H01F41/0293
摘要： A functionally graded rare earth permanent magnet is in the form of a sintered magnet body having a composition R1aR2bTcAdFeOfMg wherein the concentration of R2/(R1+R2) contained in grain boundaries surrounding primary phase grains of (R1,R2)2T14A tetragonal system within the sintered magnet body is on the average higher than the concentration of R2/(R1+R2) contained in the primary phase grains, R2 is distributed such that its concentration increases on the average from the center toward the surface of the magnet body, the oxyfluoride of (R1,R2) is present at grain boundaries in a grain boundary region that extends from the magnet body surface to a depth of at least 20 μm, and the magnet body includes a surface layer having a higher coercive force than in the interior. The invention provides permanent magnets having improved heat resistance.
摘要翻译： 功能梯度稀土永磁体是具有组成R1aR2bTcAdFeOfMg的烧结磁体的形式，其中包含在（R1，R2）2T14A四方晶系的主晶相周围的晶界中的R2 /（R1 + R2）的浓度在 烧结磁体平均高于主晶粒中所含的R2 /（R1 + R2）的浓度，R2分布成使得其浓度从中心向磁体的平均值增加，氟氧化物 （R1，R2）存在于从磁体表面延伸至至少20μm的深度的晶界区域的晶界处，并且磁体包括具有比内部更高的矫顽力的表面层。 本发明提供了具有改善的耐热性的永磁体。
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公开(公告)号：US07488395B2
公开(公告)日：2009-02-10
申请号：US11340521
申请日：2006-01-27
CPC分类号： H01F1/0577 , H01F1/058 , H01F41/0266 , H01F41/0293
摘要： A functionally graded rare earth permanent magnet having a reduced eddy current loss in the form of a sintered magnet body having a composition RaEbTcAdFeOfMg is obtained by causing E and fluorine atoms to be absorbed in a R—Fe—B sintered magnet body from its surface. F is distributed such that its concentration increases on the average from the center toward the surface of the magnet body, the concentration of E/(R+E) contained in grain boundaries surrounding primary phase grains of (R,E)2T14A tetragonal system is on the average higher than the concentration of E/(R+E) contained in the primary phase grains, the oxyfluoride of (R,E) is present at grain boundaries in a grain boundary region that extends from the magnet body surface to a depth of at least 20 μm, particles of the oxyfluoride having an equivalent circle diameter of at least 1 μm are distributed in the grain boundary region at a population of at least 2,000 particles/mm2, the oxyfluoride is present in an area fraction of at least 1%. The magnet body includes a surface layer having a higher electric resistance than in the interior. In the permanent magnet, the generation of eddy current within a magnetic circuit is restrained.
摘要翻译： 通过使E和氟原子从其表面吸收到R-Fe-B烧结磁体中，获得具有组成RaEbTcAdFeOfMg的烧结磁体形式的具有减小的涡流损耗的功能梯度稀土永磁体。 F的分布使得其浓度从磁体的中心向表面的平均值增加，包含在（R，E）2T14A四方晶系的主相晶粒周围的晶界中的E /（R + E）的浓度为 平均高于主晶粒中所含的E /（R + E）浓度时，（R，E）的氟氧化物存在于从磁体表面向深度延伸的晶界区域的晶界处 至少20微米的氟氧化物颗粒的当量圆直径至少为1微米的颗粒以至少2000个颗粒/ mm 2的总体分布在晶界区域，氟氧化物以至少1的面积分数存在 ％。 磁体包括具有比内部更高的电阻的表面层。 在永磁体中，抑制了磁路内的涡电流的产生。
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公开(公告)号：US20060213584A1
公开(公告)日：2006-09-28
申请号：US11340502
申请日：2006-01-27
CPC分类号： C22C38/005 , H01F1/0577 , H01F1/058 , H01F41/0266 , H01F41/0293
摘要： A rare earth permanent magnet is in the form of a sintered magnet body having a composition R1aR2bTcAdFeOfMg wherein F and R2 are distributed such that their concentration increases on the average from the center toward the surface of the magnet body, and grain boundaries having a concentration of R2/(R1+R2) which is on the average higher than the concentration of R2/(R1+R2) contained in primary phase grains of (R1,R2)2T14A tetragonal system form a three-dimensional network structure which is continuous from the magnet body surface to a depth of at least 10 μm. The invention provides R—Fe—B sintered magnets which exhibit a high coercive force.
摘要翻译： 稀土永磁体是具有组成R 1的烧结磁体的形式，其中R 1，R 2，R 2， 其中F和R（R）其中F和R 分散使得它们的浓度从磁体的中心朝向表面的平均值增加，并且具有浓度为R 2 /（R 0 其平均高于R 2的浓度（R 1 + R 2 + R 2） 包含在（R 1，R 2，R 2）2）2的第一相晶粒中的SUP> 2 三角形系统形成从磁体表面连续至至少10um的深度的三维网状结构。 本发明提供了表现出高矫顽力的R-Fe-B烧结磁体。
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10.发明申请公开(公告)号：US20080277028A1
公开(公告)日：2008-11-13
申请号：US12044101
申请日：2008-03-07
IPC分类号： H01F1/055
CPC分类号： C22C1/0441 , B22F2003/248 , B22F2009/041 , B22F2998/10 , C22C19/007 , C22C19/07 , H01F1/0557 , H01F41/026 , H01F41/0266 , H01F41/0273 , B22F9/04 , B22F3/02 , B22F3/10 , B22F3/24
摘要： A rare-earth alloy ingot is produced by melting an alloy composed of 20-30 wt % of a rare-earth constituent which is Sm alone or at least 50 wt % Sm in combination with at least one other rare-earth element, 10-45 wt % of Fe, 1-10 wt % of Cu and 0.5-5 wt % of Zr, with the balance being Co, and quenching the molten alloy in a strip casting process. The strip-cast alloy ingot has a content of 1-200 μm size equiaxed crystal grains of at least 20 vol % and a thickness of 0.05-3 mm. Rare-earth sintered magnets made from such alloys exhibit excellent magnetic properties and can be manufactured under a broad optimal temperature range during sintering and solution treatment.
摘要翻译： 稀土合金锭通过将由20-30重量％的Sm单独或至少50重量％的Sm与至少一种其它稀土元素组合的稀土组分，10重量％ 45重量％的Fe，1-10重量％的Cu和0.5-5重量％的Zr，余量为Co，并在条带铸造工艺中淬火熔融合金。 带状铸造合金锭的含量为至少20体积％，厚度为0.05-3毫米的1-200毫米等轴晶粒。 由这种合金制成的稀土烧结磁体显示出优异的磁性能，并且可以在烧结和固溶处理期间在宽的最佳温度范围内制造。
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