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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：US20220328223A1
公开(公告)日：2022-10-13
申请号：US17697543
申请日：2022-03-17
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 Co concentration degree of the Co concentrated area is larger than 1.2.
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公开(公告)号：US20220319749A1
公开(公告)日：2022-10-06
申请号：US17672258
申请日：2022-02-15
Applicant: TDK CORPORATION
Inventor： Hironobu KUMAOKA , Kazuhiro YOSHIDOME , Akito HASEGAWA , Satoko MORI
Abstract: 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：US20210230720A1
公开(公告)日：2021-07-29
申请号：US17119033
申请日：2020-12-11
Applicant: TDK CORPORATION
Inventor： Yoshiki KAJIURA , Akito HASEGAWA , Kazuhiro YOSHIDOME , Hiroyuki MATSUMOTO , Hironobu KUMAOKA
Abstract: A soft magnetic alloy powder has a specific composition in which a Co content is large. A soft magnetic alloy powder has a glass transition point Tg and a melting point Tm, 900° C.≤Tm≤1200° C. is satisfied, or when coercivity when applying a pressure XP to a soft magnetic alloy powder is set as YH, and a straight line obtained by linearly approximating a relationship between XP and YH by a method of least squares is set as YH=kXP+1, k (unit: Oe/MPa) satisfies 0≤k≤0.00100.
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Patent Agency Ranking
公开(公告)号：US20210062308A1
公开(公告)日：2021-03-04
申请号：US16643981
申请日：2018-05-17
Applicant: TDK CORPORATION
Inventor： Akihiro HARADA , Hiroyuki MATSUMOTO , Kenji HORINO , Kazuhiro YOSHIDOME , Akito HASEGAWA , Hajime AMANO , Kensuke ARA , Seigo TOKORO , Masakazu HOSONO , Takuma NAKANO , Satoko MORI
Abstract: Provided is a soft magnetic alloy having a composition of a compositional formula (Fe(1−(α+β))X1αX2β)(1−(a+b+c+d+e))PaCbSicCudMe. X1 is one or more selected from a group consisting of Co and Ni, X2 is one or more selected from a group consisting of Al, Mn, Ag, Zn, Sn, As, Sb, Bi, N, 0, and rare earth elements, and M is one or more selected from the group consisting of Nb, Hf, Zr, Ta, Ti, Mo, W and V. 0.050≤a≤0.17, 0
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公开(公告)号：US20200312499A1
公开(公告)日：2020-10-01
申请号：US16829735
申请日：2020-03-25
Applicant: TDK CORPORATION
Inventor： Hironobu KUMAOKA , Akito HASEGAWA , Hiroyuki MATSUMOTO , Kazuhiro YOSHIDOME
Abstract: A soft magnetic alloy contains Fe as a main element and has an amorphous phase. On a differential scanning calorimetry curve of the soft magnetic alloy, a glass transition temperature Tg is found in a range from 350° C. to 600° C. and three or more exothermic peaks are found in a range from 350° C. to 850° C.
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公开(公告)号：US20190279799A1
公开(公告)日：2019-09-12
申请号：US16296378
申请日：2019-03-08
Applicant: TDK CORPORATION
Inventor： Masakazu HOSONO , Kenji HORINO , Hiroyuki MATSUMOTO , Kazuhiro YOSHIDOME , Akito HASEGAWA , Hajime AMANO , Isao NAKAHATA
IPC: H01F1/24 , H01F1/153 , H01F27/255
Abstract: A soft magnetic alloy powder includes a plurality of soft magnetic alloy particles of a soft magnetic alloy represented by a composition formula (Fe(1−(α+β))X1αX2β)(1−(a+b+c+d+e))MaBbPcSidCe, wherein X represents Co and/or Ni; X2 represents at least one selected from the 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 the group consisting of Nb, Hf, Zr, Zr, Ta, Mo, W, and V; 0.020≤a≤0.14, 0.020
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公开(公告)号：US20190237229A1
公开(公告)日：2019-08-01
申请号：US16260715
申请日：2019-01-29
Applicant: TDK CORPORATION
Inventor： Kazuhiro YOSHIDOME , Hiroyuki MATSUMOTO , Kenji HORINO , Akito HASEGAWA , Syota GOTO , Masakazu HOSONO , Hajime AMANO , Isao NAKAHATA
CPC classification number: H01F1/14733 , B22D23/003 , B22F1/00 , B22F3/00 , C21D1/26 , C21D1/30 , C21D6/00 , C21D6/001 , C21D6/007 , C21D6/008 , C21D8/1255 , C21D9/46 , C21D9/52 , C21D2201/03 , C22C33/02 , C22C33/0214 , C22C33/0257 , C22C33/0264 , C22C33/0271 , C22C33/0278 , C22C33/0285 , C22C38/002 , C22C38/005 , C22C38/02 , C22C38/08 , C22C38/10 , C22C38/105 , C22C38/12 , C22C38/16 , C22C38/40 , C22C38/52 , C22C45/008 , C22C45/02 , C22C45/04 , C22C2200/02 , C22C2200/04 , C22C2202/02 , H01F1/147 , H01F1/14716 , H01F1/14766 , H01F1/14775 , H01F1/14791 , H01F1/15308 , H01F1/15333
Abstract: A soft magnetic alloy has a main component of Fe. The soft magnetic alloy contains P. A Fe-rich phase and a Fe-poor phase are contained. An average concentration of P in the Fe-poor phase is 1.5 times or larger than an average concentration of P in the soft magnetic alloy by number of atoms.
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公开(公告)号：US20190221342A1
公开(公告)日：2019-07-18
申请号：US16244633
申请日：2019-01-10
Applicant: TDK CORPORATION
Inventor： Kazuhiro YOSHIDOME , Akihiro HARADA , Hiroyuki MATSUMOTO , Kenji HORINO , Akito HASEGAWA , Kensuke ARA , Hajime AMANO , Masakazu HOSONO
CPC classification number: H01F1/15308 , C22C38/42 , C22C45/02 , H01F1/147 , H01F1/153 , H01F1/15333 , H01F41/02 , H01F41/0226 , H01F41/0246
Abstract: A soft magnetic alloy includes a main component of (Fe(1−(α+β))X1αX2β)(1−(a+b+c+d+e))MaBbPcSidCe. X1 is one or more of Co and Ni. X2 is one or more of Al, Mn, Ag, Zn, Sn, As, Sb, Cu, Cr, Bi, N, O, and rare earth elements. M is one or more of Nb, Hf, Zr, Ta, Mo, W, and V. 0.020≤a≤0.14 is satisfied. 0.020
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