公开(公告)号：US20190221341A1

公开(公告)日：2019-07-18

申请号：US16234941

申请日：2018-12-28

Applicant: TDK CORPORATION

Inventor： Kazuhiro YOSHIDOME ,  Akihiro HARADA ,  Hiroyuki MATSUMOTO ,  Kenji HORINO ,  Akito HASEGAWA ,  Kensuke ARA ,  Hajime AMANO ,  Masakazu HOSONO

IPC: H01F1/153 ,  C22C38/00

CPC classification number: H01F1/15325 ,  B22F9/082 ,  B22F2301/355 ,  C22C38/00 ,  C22C38/002 ,  C22C38/005 ,  C22C45/02 ,  C22C2202/02 ,  H01F1/153 ,  H01F1/15308 ,  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+f+g))MaBbPcSidCeSfTig. 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

公开(公告)号：US20180218810A1

公开(公告)日：2018-08-02

申请号：US15880920

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 ,  Shota OTSUKA

IPC: H01F1/153 ,  H01F27/255 ,  H01F27/28 ,  H01F41/02 ,  H01F41/06

CPC classification number: H01F1/15308 ,  B22F1/0018 ,  B22F9/082 ,  B22F2009/0828 ,  C22C33/003 ,  C22C38/002 ,  C22C38/004 ,  C22C38/005 ,  C22C38/007 ,  C22C38/008 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/10 ,  C22C38/12 ,  C22C38/14 ,  C22C38/18 ,  C22C38/32 ,  C22C38/60 ,  C22C45/02 ,  H01F1/15333 ,  H01F27/255 ,  H01F27/2823 ,  H01F41/0226 ,  H01F41/0246 ,  H01F41/06

Abstract: A soft magnetic alloy including a main component having a compositional formula of (Fe(1−(α+β))X1αX2β)(1−(a+b+c))MaBbPc, and a sub component including at least C, S and Ti, wherein X1 is one or more selected from the group including Co and Ni, X2 is one or more selected from the group including Al, Mn, Ag, Zn, Sn, As, Sb, Bi, and rare earth elements, “M” is one or more selected from the group including Nb, Hf, Zr, Ta, Mo, W, and V, 0.020≤a≤0.14, 0.020≤b≤0.20, 0≤c≤0.040, α≥0, β≥0, and 0≤α+β≤0.50 are satisfied, when entire said soft magnetic alloy is 100 wt %, a content of said C is 0.001 to 0.050 wt %, a content of said S is 0.001 to 0.050 wt %, and a content of said Ti is 0.001 to 0.080 wt %, and when a value obtained by dividing the content of said C by the content of said S is C/S, then C/S satisfies 0.10≤C/S≤10.

公开(公告)号：US20180122542A1

公开(公告)日：2018-05-03

申请号：US15794566

申请日：2017-10-26

Applicant: TDK CORPORATION

Inventor： Hiroyuki MATSUMOTO ,  Kenji HORINO ,  Kazuhiro YOSHIDOME ,  Akihiro HARADA ,  Akito HASEGAWA ,  Hajime AMANO ,  Kensuke ARA ,  Masahito KOEDA ,  Seigo TOKORO

IPC: H01F1/153 ,  C22C38/00 ,  C22C38/32 ,  C22C38/28 ,  C22C45/00

CPC classification number: H01F1/15333 ,  B22D11/0611 ,  B82Y30/00 ,  C21D2201/03 ,  C22C33/003 ,  C22C38/002 ,  C22C38/004 ,  C22C38/005 ,  C22C38/008 ,  C22C38/04 ,  C22C38/06 ,  C22C38/20 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/30 ,  C22C38/32 ,  C22C38/48 ,  C22C38/54 ,  C22C45/008 ,  C22C45/02 ,  H01F1/15308 ,  H01F1/15341

Abstract: A soft magnetic alloy including a composition having a formula of ((Fe(1-(α+β))X1αX2β)(1-(a+b+c+d+e))MaBbPcCrdCue)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≤0.20, 0

公开(公告)号：US20180096765A1

公开(公告)日：2018-04-05

申请号：US15718617

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

IPC: H01F1/147 ,  H01F27/255 ,  C22C38/16 ,  C22C38/12 ,  C22C38/02

CPC classification number: H01F1/14766 ,  C22C38/02 ,  C22C38/12 ,  C22C38/16 ,  H01F1/15308 ,  H01F27/255

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 in 400,000/μm3 or more. A ratio of Fe content maximum points whose coordination number is 1 or more and 5 or less is 80% or more and 100% or less with respect to all of the Fe content maximum points.

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

IPC: H01F1/153 ,  C22C45/02

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.

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

IPC: H01F1/153 ,  C22C38/02 ,  C22C45/02

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.

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

IPC: H01F1/153 ,  H01F1/20

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.

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

IPC: H01F1/153 ,  C22C45/00

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.

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

IPC: C22C45/02 ,  C21D9/52 ,  B22F9/08 ,  B22F1/00

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).

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

IPC: H01F1/153 ,  H01F1/147 ,  H01F27/24

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