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公开(公告)号：US20210020342A1
公开(公告)日：2021-01-21
申请号：US16971338
申请日：2019-02-15
Applicant: TDK CORPORATION
Inventor： Hajime AMANO , Akihiro HARADA , Kenji HORINO , Hiroyuki MATSUMOTO , Kazuhiro YOSHIDOME , Akito HASEGAWA , Kensuke ARA , Masakazu HOSONO
Abstract: Provided is a soft magnetic alloy which has high saturation flux density and low coercivity and is represented by the compositional formula (Fe(1−(α+β))X1αX2β)(1−(a+b+c+d+e+f))MaPbSicCudX3eBf, wherein X1 is at least one element selected from the group consisting of Co and Ni, X2 is at least one element selected from the group consisting of Ti, V, Mn, Ag, Zn, Al, Sn, As, Sb, Bi, and rare earth elements, X3 is at least one element selected from the group consisting of C and Ge, and M is at least one element selected from the group consisting of Zr, Nb, Hf, Ta, Mo, and W, and wherein 0.030≤a≤0.120, 0.010≤b≤0.150, 0≤c≤0.050, 0≤d≤0.020, 0≤e≤0.100, 0≤f≤0.030, α≥0, β≥0, and 0≤α+β≤0.55.
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公开(公告)号：US20200377982A1
公开(公告)日：2020-12-03
申请号：US16971477
申请日：2019-02-15
Applicant: TDK CORPORATION
Inventor： Hajime AMANO , Akihiro HARADA , Kazuhiro YOSHIDOME , Kenji HORINO , Hiroyuki MATSUMOTO , Kensuke ARA , Akito HASEGAWA , Seigo TOKORO
Abstract: Provided is a soft magnetic alloy which has high saturation flux density, low coercivity, and a high specific resistance, and is represented by the compositional formula (Fe(1−(α+β))X1αX2β)(1−(a+b+c+d+e))MaSibCucX3dBe, wherein X1 is at least one element selected from the group consisting of Co and Ni, X2 is at least one element selected from the group consisting of Ti, V, Mn, Ag, Zn, Al, Sn, As, Sb, Bi, and rare earth elements, X3 is at least one element selected from the group consisting of C and Ge, and M is at least one element selected from the group consisting of Zr, Nb, Hf, Ta, Mo, and W, and wherein 0.030≤a≤0.120, 0.020≤b≤0.175, 0≤c≤0.020, 0≤d≤0.100, 0≤e≤0.030, α≥0, β≥0, and 0≤α+β≤0.55).
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公开(公告)号：US20190355498A1
公开(公告)日：2019-11-21
申请号：US16413848
申请日：2019-05-16
Applicant: TDK CORPORATION
Inventor： Kazuhiro YOSHIDOME , Hiroyuki MATSUMOTO , Kenji HORINO , Satoko MORI , Masakazu HOSONO , Yoshiki KAJIURA
Abstract: 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：US20190279797A1
公开(公告)日：2019-09-12
申请号：US16296394
申请日：2019-03-08
Applicant: TDK CORPORATION
Inventor： Takuma NAKANO , Kazuhiro YOSHIDOME , Hiroyuki MATSUMOTO , Satoko MORI , Seigo TOKORO , Kenji HORINO
Abstract: Soft magnetic metal powder which includes a plurality of soft magnetic metal particles configured by a Fe-based nanocrystal alloy including Cu is provided, wherein the soft magnetic metal particles have core portions and first shell portions surrounding circumferences of the core portions; when an average crystallite size of Cu crystallites existing in the core portions is set as A, and the largest crystallite size of Cu crystallites existing in the first shell portions is set as B, B/A is 3.0 or more and 1000 or less
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公开(公告)号：US20190279796A1
公开(公告)日：2019-09-12
申请号：US16296559
申请日：2019-03-08
Applicant: TDK CORPORATION
Inventor： Masakazu HOSONO , Hiroyuki MATSUMOTO , Kenji HORINO , Kazuhiro YOSHIDOME , Isao NAKAHATA , Akito HASEGAWA , Hajime AMANO
Abstract: Soft magnetic alloy powder includes plurality of soft magnetic alloy particles of soft magnetic alloy represented by composition formula (Fe(1−(α+β))X1αX2β)(1−(a+b+c++e+f+g))MaBbPcSidCeSfTig, wherein X1 represents Co and/or Ni; X2 represents at least one selected from group consisting of Al, Mn, Ag, Zn, Sn, As, Sb, Cu, Cr, Bi, N, O, and rare earth elements; M represents at least one selected from group consisting of Nb, Hf, Zr, Ta, Mo, W, and V; 0.020≤a≤0.14, 0.020
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Patent Agency Ranking
公开(公告)号：US20180218813A1
公开(公告)日：2018-08-02
申请号：US15881227
申请日：2018-01-26
Applicant: TDK CORPORATION
Inventor： Akihiro HARADA , Hiroyuki MATSUMOTO , Kenji HORINO , Kazuhiro YOSHIDOME , Akito HASEGAWA , Hajime AMANO , Kensuke ARA , Seigo TOKORO
Abstract: A soft magnetic alloy comprising a main component having a compositional formula of ((Fe(1−(α+β))X1αX2β)(1−(a+b+c))MaBbCrc)1−dCd, and a sub component including P, S and Ti, wherein X1 is selected from the group Co and Ni, X2 is selected from the group Al, Mn, Ag, Zn, Sn, As, Sb, Bi and rare earth elements, “M” is selected from the group Nb, Hf, Zr, Ta, Mo, W and V, 0.030≤a≤0.14, 0.005≤b≤0.20, 0
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公开(公告)号：US20180096766A1
公开(公告)日：2018-04-05
申请号：US15718757
申请日：2017-09-28
Applicant: TDK CORPORATION
Inventor： Kazuhiro YOSHIDOME , Hiroyuki MATSUMOTO , Yu YONEZAWA , Syota GOTO , Hideaki YOKOTA , Akito HASEGAWA , Masahito KOEDA , Seigo TOKORO
CPC classification number: H01F1/14766 , C22C38/02 , C22C38/12 , C22C38/16 , C22C2202/02 , H01F1/15308 , H01F1/15333
Abstract: A soft magnetic alloy includes a main component of Fe. The soft magnetic alloy includes a Fe composition network phase where regions whose Fe content is larger than an average composition of the soft magnetic alloy are linked. The Fe composition network phase contains Fe content maximum points that are locally higher than their surroundings. A virtual-line total distance per 1 μm3 of the soft magnetic alloy is 10 mm to 25 mm provided that the virtual-line total distance is a sum of virtual lines linking the maximum points adjacent each other. A virtual-line average distance that is an average distance of the virtual lines is 6 nm or more and 12 nm or less.
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公开(公告)号：US20250066889A1
公开(公告)日：2025-02-27
申请号：US18724660
申请日：2022-08-31
Applicant: TDK CORPORATION
Inventor： Kensuke ARA , Hajime AMANO , Kazuhiro YOSHIDOME , Takuya TSUKAHARA
Abstract: This soft magnetic alloy contains Fe, Co, and at least one selected from among M and X. M is at least one selected from among Ti, V, Cr, Zr, Nb, Mo, Hf, Ta, and W. X is at least one selected from among Si, B, C and P. A volume ratio of a portion in which both the content of Fe and the total content of M and X fall within specific ranges have a specific relationship with a volume ratio of a portion in which both the content of Co and the total content of M and X fall within specific ranges
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公开(公告)号：US20240047109A1
公开(公告)日：2024-02-08
申请号：US18358513
申请日：2023-07-25
Applicant: TDK CORPORATION
Inventor： Kazuhiro YOSHIDOME , Kensuke ARA
IPC: H01F3/08
CPC classification number: H01F3/08
Abstract: Provided is a magnetic core in which metal magnetic particles occupy an area of 75% to 90% on a cross-section. The metal magnetic particles include first large particles having a crystalline metal material and having a Heywood diameter of 3 μm or more on the cross-section of the magnetic core, and second large particles having a nanocrystal structure or an amorphous structure and having a Heywood diameter of 3 μm or more, and an insulation coating of the first large particles is thicker than an insulation coating of the second large particles.
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公开(公告)号：US20230095146A1
公开(公告)日：2023-03-30
申请号：US17944834
申请日：2022-09-14
Applicant: TDK CORPORATION
Inventor： Masakazu HOSONO , Kazuhiro YOSHIDOME , Yoshiki KAJIURA , Hiroyuki MATSUMOTO
IPC: B22F9/08
Abstract: A metal powder producing apparatus includes a molten metal supply unit, a cylinder body, and a cooling liquid introduction unit. The molten metal supply unit discharges a molten metal. The cylinder body is capable of being formed with a layer of a cooling liquid for cooling the molten metal on an inner circumference surface of the cylinder body. The cooling liquid introduction unit supplies the cooling liquid to an upper inside of the cylinder body. The inner circumference surface of the upper inside of the cylinder body has a substantially elliptical shape.
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