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

IPC: C22C38/16 ,  H01F1/153 ,  C22C38/02 ,  C22C38/00 ,  C22C38/14 ,  C22C38/12 ,  C22C38/10 ,  C22C38/08

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

公开(公告)号：US20180247744A1

公开(公告)日：2018-08-30

申请号：US15904986

申请日：2018-02-26

Applicant: TDK CORPORATION

Inventor： Kazuhiro YOSHIDOME ,  Hiroyuki MATSUMOTO ,  Kenji HORINO ,  Akito HASEGAWA ,  Yu YONEZAWA ,  Syota GOTO ,  Seigo TOKORO

IPC: H01F1/153 ,  C22C45/02

CPC classification number: H01F1/1535 ,  C22C33/003 ,  C22C38/02 ,  C22C38/04 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/20 ,  C22C45/02 ,  C22C2200/02 ,  C22C2202/02 ,  H01F1/15308 ,  H01F41/0226 ,  H01F41/0246

Abstract: Provided is a soft magnetic alloy including Fe as a main component, in which a slope of an approximate straight line, plotted between cumulative frequencies of 20 to 80% on Fe content in each grid of 80000 grids or more, each of which has 1 nm×1 nm×1 nm, is −0.1 to −0.4, provided that Fe content (atom %) of each grid is Y axis, and the cumulative frequencies (%) obtained in descending order of Fe content in each grid is X axis, and an amorphization ratio X is 85% or more.

公开(公告)号：US20230268107A1

公开(公告)日：2023-08-24

申请号：US18169297

申请日：2023-02-15

Applicant: TDK CORPORATION

Inventor： Seigo TOKORO ,  Kazuhiro YOSHIDOME ,  Akito HASEGAWA ,  Nobuhiro OKUDA

IPC: H01F3/08 ,  H01F1/33 ,  H01F1/20

CPC classification number: H01F3/08 ,  H01F1/33 ,  H01F1/20

Abstract: A magnetic core, containing metal magnetic powder and resin, in which a content of the metal magnetic powder satisfies 60%≤(A1/A2)≤90%. The metal magnetic powder includes small particles having the Heywood diameter of 1 μm or less in the cross section of the magnetic core and large particles having the Heywood diameter of 5 μm or more and less than 40 μm. An edge-to-edge distance regarding to a distance between the small particles satisfies 5≤((L1av/dav)×100)≤70. An edge-to-edge distance regarding to a distance between the small particles and the large particles satisfies 0.02 μm≤L2av≤0.13 μm and σ≤0.25 μm.

公开(公告)号：US20180218811A1

公开(公告)日：2018-08-02

申请号：US15880859

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

IPC: H01F1/153 ,  H01F1/00 ,  H01F27/255

CPC classification number: H01F1/15325 ,  H01F1/0045 ,  H01F1/15333 ,  H01F27/255 ,  H01F41/0226

Abstract: A soft magnetic alloy comprising a main component having a compositional formula of ((Fe(1−(α+β))X1αX2β)(1−(a+b))MaBb)1−cCc, 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 one or more selected from the group Nb, Hf, Zr, Ta, Mo, W, and V, 0.030≤a≤0.14, 0.005≤b≤0.20, 0≤c≤0.040, α≥0, β≥0, and 0≤α+β≤0.50 are satisfied, when magnetic alloy is 100 wt %, P is 0.001 to 0.050 wt %, S is 0.001 to 0.050 wt %, and Ti is 0.001 to 0.080 wt %, and when a value obtained by dividing P by S is P/S, then P/S satisfies 0.10≤P/S≤10.

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

IPC: H01F1/153 ,  C22C45/02

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

公开(公告)号：US20190279801A1

公开(公告)日：2019-09-12

申请号：US16296348

申请日：2019-03-08

Applicant: TDK CORPORATION

Inventor： Kazuhiro YOSHIDOME ,  Hiroyuki MATSUMOTO ,  Kenji HORINO ,  Satoko MORI ,  Takuma NAKANO ,  Seigo TOKORO ,  Shota OTSUKA ,  Toru UJIIE ,  Kentaro MORI

IPC: H01F1/38 ,  B22F1/02

Abstract: 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.

公开(公告)号：US20190279798A1

公开(公告)日：2019-09-12

申请号：US16296367

申请日：2019-03-08

Applicant: TDK CORPORATION

Inventor： Satoko MORI ,  Hiroyuki MATSUMOTO ,  Kenji HORINO ,  Kazuhiro YOSHIDOME ,  Takuma NAKANO ,  Seigo TOKORO ,  Shota OTSUKA ,  Toru UJIIE ,  Kentaro MORI

IPC: H01F1/20 ,  H01F1/147 ,  H01F1/36 ,  H01F3/08

Abstract: A soft magnetic metal powder comprising soft magnetic metal particles including Fe, wherein a surface of the soft magnetic metal particle is covered by a coating part having an insulation property, and the coating part includes a soft magnetic metal fine particle.

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.