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公开(公告)号：US20180122543A1
公开(公告)日：2018-05-03
申请号：US15794578
申请日：2017-10-26
Applicant: TDK CORPORATION
Inventor： Akihiro HARADA , Hiroyuki MATSUMOTO , Kenji HORINO , Kazuhiro YOSHIDOME , Akito HASEGAWA , Hajime AMANO , Kensuke ARA , Masahito KOEDA , Seigo TOKORO
Abstract: A soft magnetic alloy including a composition having a formula of ((Fe(1−(α+β))X1αX2β)(1−(a+b+d+e))MaBbCrdCue)1−fCf. X1 is one or more elements selected from a group of Co and Ni. X2 is one or more elements selected from a group of W, Al, Mn, Ag, Zn, Sn, As, Sb, Bi, N, O, and rare earth elements. M is one or more elements selected from a group of Nb, Hf, Zr, Ta, Ti, Mo, and V. 0.030≤a≤0.14, 0.028≤b≤0.15, 0.005≤d≤0.020, 0
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公开(公告)号：US20180087167A1
公开(公告)日：2018-03-29
申请号：US15577059
申请日：2015-05-26
Applicant: TDK CORPORATION , RIO TINTO ALCAN INTERNATIONAL LIMITED
Inventor： Kazuhiro YOSHIDOME , Ryoma NAKAZAWA
CPC classification number: C25C3/08 , B22F7/06 , B22F7/064 , B22F7/08 , B22F2201/02 , B22F2301/10 , B22F2302/25 , B22F2999/00 , B32B5/16 , B32B7/02 , B32B9/041 , B32B15/04 , B32B15/043 , B32B15/16 , B32B15/20 , B32B2250/03 , B32B2260/025 , B32B2260/046 , B32B2264/102 , B32B2264/105 , B32B2307/202 , B32B2307/54 , B32B2307/714 , B32B2307/748 , B32B2457/00 , C22C1/0425 , C22C1/0433 , C22C9/06 , C22C19/03 , C22C29/12 , C25C3/12 , C25C7/025 , B22F2207/01
Abstract: An assembly body including a cermet member, a metal member and an intermediate member bonded to the cermet member and the metal member, wherein the cermet member includes an oxide phase and a metal phase, the intermediate member includes at least a first intermediate layer and a second intermediate layer, the first intermediate layer is bonded to the cermet member, the first intermediate layer includes at least a first metal M1, the second intermediate layer includes at least a second metal M2, a melting point of the first metal M1 is lower than the second metal M2, a weight concentration of M1 at the first intermediate layer is higher than the weight concentration of M1 at the second intermediate layer, and the weight concentration of M2 at the second intermediate layer is higher than the weight concentration of M2 at the first intermediate layer.
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公开(公告)号：US20250111968A1
公开(公告)日：2025-04-03
申请号：US18899295
申请日：2024-09-27
Applicant: TDK Corporation
Inventor： Kazuhiro YOSHIDOME , Hiroyuki Matsumoto , Shota Otsuka , Masashi Ito , Hitoshi Ohkubo
Abstract: A soft magnetic metal powder includes soft magnetic metal particles with a particle size of 5.0 μm or more. (y95/y50−y90/y50)/(0.95−0.90) is 20.0 or less, where y95 (μm) denotes D95, y90 (μm) denotes D90, and y50 (μm) denotes D50 of a particle size distribution of the soft magnetic metal particles with a particle size of 5.0 μm or more. A magnetic core includes soft magnetic metal particles with a Heywood diameter of 5.0 μm or more in a section of the magnetic core. (Y95/Y50−Y90/Y50)/(0.95−0.90) is 20.0 or less, where Y95 (μm) denotes D95, Y90 (μm) denotes D90, and Y50 (μm) denotes D50 of a particle size distribution of the soft magnetic metal particles with a Heywood diameter of 5.0 μm or more.
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公开(公告)号：US20230420174A1
公开(公告)日：2023-12-28
申请号：US18339765
申请日：2023-06-22
Applicant: TDK CORPORATION
Inventor： Kazuhiro YOSHIDOME , Satoko MORI , Hiroyuki MATSUMOTO
CPC classification number: H01F27/255 , B22F1/052 , B22F1/08 , B22F1/16 , B22F9/082 , B22F3/24 , B22F3/02 , B22F2304/10 , B22F2301/35 , B22F2009/0824 , B22F2998/10 , B22F2003/248
Abstract: A magnetic core includes metal magnetic particles. A total area percentage of the metal magnetic particles in a cross section of the magnetic core is 75% or more and 90% or less. The metal magnetic particles include first particles whose Haywood diameters in the cross section of the magnetic core are 3 μm or more and second particles whose Haywood diameters in the cross section of the magnetic core are less than 3 μm. The second particles include two or more types of small particles with different compositions of films existing on their particle surfaces.
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公开(公告)号：US20230343497A1
公开(公告)日：2023-10-26
申请号：US18302270
申请日：2023-04-18
Applicant: TDK CORPORATION
Inventor： Kyohei TAKAHASHI , Hiroshi ITO , Isao KANADA , Kazuhiro YOSHIDOME
IPC: H01F1/08
Abstract: A metal magnetic powder contains Co as a main component, and the metal magnetic powder includes metal nanoparticles having a mean particle size (D50) of 1 nm or more and 100 nm or less. Each of the metal nanoparticles includes hcp-Co as a main phase, and the metal magnetic powder includes fcc-Co and/or ε-Co as a sub-phase.
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Patent Agency Ranking
公开(公告)号：US20230245810A1
公开(公告)日：2023-08-03
申请号：US18159313
申请日：2023-01-25
Applicant: TDK CORPORATION
Inventor： Hajime AMANO , Kensuke ARA , Kazuhiro YOSHIDOME , Risako TSURUMARU
CPC classification number: H01F10/131 , C22C45/02
Abstract: A nanogranular magnetic film includes a structure including first phases comprised of nano-domains dispersed in a second phase. The first phases include at least one selected from the group consisting of Fe, Co, and Ni. The second phase includes at least one selected from the group consisting of O, N, and F. A ratio of a volume of the first phases to a total volume of the first phases and the second phase is 65% or less. The nanogranular magnetic film has a porosity of 0.17 or more and 0.30 or less.
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公开(公告)号：US20230130266A1
公开(公告)日：2023-04-27
申请号：US17968627
申请日：2022-10-18
Applicant: TDK CORPORATION
Inventor： Akito HASEGAWA , Satoko MORI , Kazuhiro YOSHIDOME
Abstract: 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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公开(公告)号：US20220328222A1
公开(公告)日：2022-10-13
申请号：US17672441
申请日：2022-02-15
Applicant: TDK CORPORATION
Inventor： Hironobu KUMAOKA , Kazuhiro YOSHIDOME , Akito HASEGAWA , Satoko MORI
Abstract: 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 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.
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公开(公告)号：US20210134513A1
公开(公告)日：2021-05-06
申请号：US17082389
申请日：2020-10-28
Applicant: TDK CORPORATION
Inventor： Nobuhiro OKUDA , Hiroyuki MATSUMOTO , Kazuhiro YOSHIDOME
IPC: H01F27/255 , H01F1/153
Abstract: A magnetic core having a high relative permeability is obtained. The magnetic core contains soft magnetic metal powder particles. In a cross section of the magnetic core, a number ratio of soft magnetic metal powder particles having a circularity of less than 0.50 to a total number of soft magnetic metal powder particles having a particle size of 10 μm or more and less than 50 μm is 0.05% or more and 1.50% or less.
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公开(公告)号：US20210098162A1
公开(公告)日：2021-04-01
申请号：US17028234
申请日：2020-09-22
Applicant: TDK Corporation
Inventor： Hironobu KUMAOKA , Akito HASEGAWA , Kazuhiro YOSHIDOME , Hiroyuki MATSUMOTO
Abstract: Provided is a soft magnetic alloy including a Fe-based nanocrystal and metallic glass. A differential scanning calorimetry curve of the soft magnetic alloy has a glass transition point Tg, a temperature rising rate of the soft magnetic alloy in measurement of the differential scanning calorimetry curve is 40 K/minute, and a temperature Tp of a maximum exothermic peak in the differential scanning calorimetry curve is higher than the Tg.
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