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公开(公告)号：US11827962B2
公开(公告)日：2023-11-28
申请号：US17210056
申请日：2021-03-23
申请人： TDK CORPORATION
CPC分类号： C22C38/12 , C21D6/008 , C21D9/52 , C22C38/02 , H01F1/147 , C22C2200/04 , C22C2202/02
摘要： The present invention provides a soft magnetic alloy having good soft magnetic properties. The soft magnetic alloy includes nanocrystals having an average Heywood diameter value of 5.0 nm or more and 25.0 nm or less, in which an average circularity of the nanocrystals is 0.50 or more and 0.90 or less.
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公开(公告)号：US11158443B2
公开(公告)日：2021-10-26
申请号：US16146268
申请日：2018-09-28
申请人： TDK CORPORATION
发明人： Akihiro Harada , Hiroyuki Matsumoto , Kenji Horino , Kazuhiro Yoshidome , Akito Hasegawa , Hajime Amano , Kensuke Ara , Seigo Tokoro , Masakazu Hosono , Takuma Nakano , Satoko Mori
摘要： A soft magnetic alloy contains a main component having a composition formula of (Fe(1−(α+β))X1αX2β)(1−(a+b+c+d))MaBbPcCd and auxiliary components including at least Ti, Mn and Al. In the composition formula, X1 is one or more selected from the group consisting of Co and Ni, X2 is one or more selected from the group consisting of Ag, Zn, Sn, As, Sb, Bi and a rare earth element, and M is one or more selected from the group consisting of Nb, Hf, Zr, Ta, Mo, W and V. In the composition formula, 0.030≤a≤0.100, 0.050≤b≤0.150, 0
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公开(公告)号：US11763969B2
公开(公告)日：2023-09-19
申请号：US16296626
申请日：2019-03-08
申请人： TDK CORPORATION
发明人： Kazuhiro Yoshidome , Hiroyuki Matsumoto , Kenji Horino , Satoko Mori , Takuma Nakano , Seigo Tokoro , Shota Otsuka , Toru Ujiie , Kentaro Mori
IPC分类号： H01F1/26 , H01F1/38 , H01F1/33 , H01F1/24 , H01F3/08 , B22F1/16 , H01F27/255 , H01F41/02 , H01F1/153
CPC分类号： H01F1/26 , B22F1/16 , H01F1/24 , H01F1/33 , H01F1/38 , H01F3/08 , B22F2301/35 , B22F2304/10 , H01F1/15308 , H01F1/15333 , H01F27/255 , H01F41/0246
摘要： A soft magnetic metal powder having soft magnetic metal particles including Fe, wherein a surface of the soft magnetic metal particle is covered by a coating part, the coating part has a first coating part and a second coating part in this order from the surface of the soft magnetic metal particle towards outside, the first coating part includes oxides of Fe as a main component, the second coating part includes a compound of at least one element selected from the group consisting of P, Si, Bi, and Zn, and a ratio of trivalent Fe atom among Fe atoms of oxides of Fe included in the first coating part is 50% or more.
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公开(公告)号：US12062473B2
公开(公告)日：2024-08-13
申请号：US17697543
申请日：2022-03-17
申请人： TDK CORPORATION
CPC分类号： H01F1/15308 , H01F1/147 , H01F1/20
摘要： A soft magnetic alloy including an internal area having a soft magnetic type alloy composition including Fe and Co, a Co concentrated area existing closer to a surface side than the internal area and having a higher Co concentration than in the internal area, and a Co concentration degree of the Co concentrated area is larger than 1.2.
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公开(公告)号：US11993833B2
公开(公告)日：2024-05-28
申请号：US16939484
申请日：2020-07-27
申请人： TDK Corporation
CPC分类号： C22C38/002 , B22F1/08 , C22C38/12 , C22C38/14 , H01F1/153 , B22F1/16 , B22F9/082 , B22F2301/35 , C01P2002/00 , C01P2002/02 , C01P2004/80 , C01P2004/84 , C01P2006/42 , C22C2202/02 , B22F2999/00 , B22F1/145 , B22F2201/03 , B22F1/142 , B22F2998/10 , B22F2009/0824 , B22F1/08 , B22F1/145 , B22F1/16 , B22F2999/00 , B22F1/16 , B22F2207/01 , C22C33/0257 , B22F1/08
摘要： Provided is a soft magnetic metal powder including a plurality of soft magnetic metal particles. Each of the soft magnetic metal particles includes a metal particle and an oxidized part covering the metal particle. The metal particle includes at least Fe. The oxidized part includes at least one kind of element of S and an element M. The element M is at least one kind of element selected from the group consisting of Nb, Ta, W, Zr, Hf, and Cr. A unit of a concentration of each of S and the element M in the metal particle and the oxidized part is atom %. The concentration of S or the element M in the metal particle and the oxidized part has a maximum value in the oxidized part.
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公开(公告)号：US11881338B2
公开(公告)日：2024-01-23
申请号：US17672258
申请日：2022-02-15
申请人： TDK CORPORATION
CPC分类号： H01F1/15316 , C22C38/002 , C22C38/02 , C22C38/30 , C22C38/32 , C22C2202/02
摘要： A soft magnetic alloy comprising an internal area having a soft magnetic type alloy composition including Fe and Co, a Co concentrated area existing closer to a surface side than the internal area and having a higher Co concentration than in the internal area, a SB concentrated area existing closer to the surface side than the Co concentrated area and having a higher concentration of at least one element selected from Si and B than in the internal area, and a Fe concentrated area including Fe existing closer to the surface side than the SB concentrated area; wherein a crystalized area ratio of the SB concentrated area represented by SSBcry/SSB and a crystalized area ratio of the Fe concentrated area represented by SFecry/SFe, satisfy a relation of (SSBcry/SSB)
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公开(公告)号：US11894169B2
公开(公告)日：2024-02-06
申请号：US16413848
申请日：2019-05-16
申请人： TDK CORPORATION
发明人： Kazuhiro Yoshidome , Hiroyuki Matsumoto , Kenji Horino , Satoko Mori , Masakazu Hosono , Yoshiki Kajiura
IPC分类号： H01F1/153 , C22C38/00 , C22C38/06 , C22C38/16 , H01F1/147 , C22C38/10 , C22C38/08 , C22C38/04 , C22C38/60
CPC分类号： H01F1/15333 , C22C38/007 , C22C38/008 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/10 , C22C38/105 , C22C38/16 , C22C38/60 , H01F1/14741 , H01F1/15308
摘要： Disclosed is a soft magnetic powder including a main component represented by composition formula: (Fe(1−(α+β))X1αX2β)(1−(a+b+c+d+e+f))MaBbPcSidCeSf. X1 represents one or more selected from the group consisting of Co and Ni; X2 represents one or more selected from the group consisting of Al, Mn, Ag, Zn, Sn, As, Sb, Cu, Cr, Bi, N, and rare earth elements; and M represents one or more selected from the group consisting of Nb, Hf, Zr, Ta, Mo, W, Ti, and V. The following relations are satisfied: 0≤a≤0.140; 0.020
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公开(公告)号：US11798719B2
公开(公告)日：2023-10-24
申请号：US16296348
申请日：2019-03-08
申请人： TDK CORPORATION
发明人： Kazuhiro Yoshidome , Hiroyuki Matsumoto , Kenji Horino , Satoko Mori , Takuma Nakano , Seigo Tokoro , Shota Otsuka , Toru Ujiie , Kentaro Mori
IPC分类号： H01F1/24 , H01F1/38 , H01F1/33 , H01F1/26 , H01F3/08 , B22F1/16 , H01F27/255 , H01F41/02 , H01F1/153
CPC分类号： H01F1/24 , B22F1/16 , H01F1/26 , H01F1/33 , H01F1/38 , H01F3/08 , B22F2301/35 , B22F2304/10 , H01F1/15308 , H01F1/15333 , H01F27/255 , H01F41/0246
摘要： A soft magnetic metal powder having soft magnetic metal particles, wherein a surface of the soft magnetic metal particle is covered by a coating part, the coating part has a first coating part, a second coating part, and a third coating part in this order from the surface of the soft magnetic metal particle towards outside, the first coating part includes oxides of Si as a main component, the second coating part includes oxides of Fe as a main component, and the third coating part includes a compound of at least one element selected from the group consisting of P, Si, Bi, and Zn.
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公开(公告)号：US11739403B2
公开(公告)日：2023-08-29
申请号：US16829074
申请日：2020-03-25
申请人： TDK CORPORATION
IPC分类号： C22C38/16 , H01F1/147 , B22F9/08 , C22C38/12 , C22C38/00 , H01F1/153 , C22C38/02 , H01F1/33 , H01F1/36 , B22F1/16 , H01F1/20 , H01F1/24 , B22F1/08
CPC分类号： C22C38/16 , B22F1/08 , B22F1/16 , B22F9/082 , C22C38/002 , C22C38/02 , C22C38/12 , H01F1/14766 , H01F1/15308 , H01F1/15333 , H01F1/15341 , H01F1/20 , H01F1/24 , H01F1/33 , H01F1/36 , B22F2301/35 , C22C2200/02 , C22C2200/04 , C22C2202/02
摘要： A soft magnetic metal powder that has low coercivity Hcj and high saturation magnetic flux density Bs, and has high powder resistivity and high insulating performance is obtained. The soft magnetic metal powder is soft magnetic metal powder containing Fe. The soft magnetic metal powder has particles each including a soft magnetic metal portion and a coating portion coating the soft magnetic metal portion. The coating portion includes a first coating portion and a second coating portion. The first coating portion is closer to the soft magnetic metal portion than the second coating portion. The first coating portion and the second coating portion have oxides containing at least one element selected from Si, Fe, and B as a main component. The first coating portion includes amorphous material, the second coating portion includes crystals, and the second coating portion has a higher crystal content ratio than the first coating portion.
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公开(公告)号：US12062474B2
公开(公告)日：2024-08-13
申请号：US17968627
申请日：2022-10-18
申请人： TDK CORPORATION
发明人： Akito Hasegawa , Satoko Mori , Kazuhiro Yoshidome
CPC分类号： H01F1/15316 , C22C19/07 , C22C33/0257 , C22C45/02
摘要： A soft magnetic alloy powder includes a particle body and a surface layer. The particle body comprises a soft magnetic alloy including Fe and Co. The surface layer is located on a surface side of the particle body. The surface layer includes one or more local maximum points of Si concentration and one or more local maximum points of Co concentration. The surface layer satisfies DSi≤DCo, in which DSi is a distance from an interface between the particle body and the surface layer to a first Si local maximum point LSimax, and DCo is a distance from the interface to a first Co local maximum point LComax.
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