公开(公告)号：US20210098164A1

公开(公告)日：2021-04-01

申请号：US17036447

申请日：2020-09-29

Applicant: TDK CORPORATION

Inventor： Masahito KOEDA ,  Kazuhiro YOSHIDOME ,  Hiroyuki MATSUMOTO

IPC: H01F3/08 ,  H01F1/24 ,  H01F1/153

Abstract: According to an aspect, a soft magnetic metal powder includes a plurality of soft magnetic metal particles containing iron, a surface of each of the soft magnetic metal particles is covered with a coating part, and a maximum height Sz of a surface of the coating part is 10 to 700 nm. According to another aspect, a soft magnetic metal powder includes a plurality of soft magnetic metal particles containing iron, a surface of each of the soft magnetic metal particles is covered with a coating part, and a maximum height Rz of a surface of the coating part is 10 to 700 nm.

公开(公告)号：US20210035719A1

公开(公告)日：2021-02-04

申请号：US16939378

申请日：2020-07-27

Applicant: TDK Corporation

Inventor： Satoko MORI ,  Kazuhiro YOSHIDOME ,  Hiroyuki MATSUMOTO

IPC: H01F1/153

Abstract: Provided is a soft magnetic metal powder including a plurality of soft magnetic metal particles. Each of the soft magnetic metal particles includes a metal particle and an oxidized part covering the metal particle. The metal particle includes at least Fe. The oxidized part includes an oxide of at least one kind of element selected from the group consisting of Fe, Si, and B, and at least one kind of element of Ca and Mg. A concentration of Ca or Mg in the metal particle and the oxidized part is maximum in the oxidized part. An average value of a maximum value of the concentration of Ca or Mg in the oxidized part is 0.2 atom % or more.

公开(公告)号：US20200306831A1

公开(公告)日：2020-10-01

申请号：US16829074

申请日：2020-03-25

Applicant: TDK CORPORATION

Inventor： Satoko MORI ,  Kazuhiro YOSHIDOME ,  Hiroyuki MATSUMOTO

IPC: B22F1/02 ,  H01F1/147 ,  B22F9/08 ,  C22C38/16 ,  C22C38/12 ,  C22C38/02 ,  C22C38/00 ,  H01F1/153

Abstract: A soft magnetic metal powder that has low coercivity Hcj and high saturation magnetic flux density Bs, and has high powder resistivity and high insulating performance is obtained. The soft magnetic metal powder is soft magnetic metal powder containing Fe. The soft magnetic metal powder has particles each including a soft magnetic metal portion and a coating portion coating the soft magnetic metal portion. The coating portion includes a first coating portion and a second coating portion. The first coating portion is closer to the soft magnetic metal portion than the second coating portion. The first coating portion and the second coating portion have oxides containing at least one element selected from Si, Fe, and B as a main component. The first coating portion includes amorphous material, the second coating portion includes crystals, and the second coating portion has a higher crystal content ratio than the first coating portion.

公开(公告)号：US20190214171A1

公开(公告)日：2019-07-11

申请号：US16221977

申请日：2018-12-17

Applicant: TDK CORPORATION

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

IPC: H01F1/26 ,  H01F1/147 ,  H01F1/38

CPC classification number: H01F1/26 ,  H01F1/14708 ,  H01F1/14766 ,  H01F1/15308 ,  H01F1/15333 ,  H01F1/38 ,  H01F41/0226 ,  H01F41/0246

Abstract: A soft magnetic alloy which includes nanocrystal parts and amorphous parts is provided. The nanocrystal parts include αFe(—Si) as a main component, and include at least one of elements selected from B, P, C, Ti, Zr, Hf, Nb, Ta, Mo, V, W, Cr, Al, Mn, Zn, and Cu as a sub-component. When a total content ratio of the sub-component in the nanocrystal parts is set as α (at %), and a total content ratio of the sub-components of the nanocrystal parts included in the amorphous parts is set as β (at %), 0.01≤(α/β)≤0.40, and a crystallinity degree is 5% or more and 70% or less.

公开(公告)号：US20190108931A1

公开(公告)日：2019-04-11

申请号：US16146268

申请日：2018-09-28

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: H01F1/147 ,  C22C38/14 ,  C22C38/04 ,  C22C38/06 ,  C22C38/00 ,  C22C38/12

Abstract: A soft magnetic alloy contains a main component having a composition formula of (Fe(1−(α−β))X1αX2β)1−(a+b+c+d))MaBbPcCd and auxiliary components including at least Ti, Mn and Al. In the composition formula, X1 is one or more selected from the group consisting of Co and Ni, X2 is one or more selected from the group consisting of Ag, Zn, Sn, As, Sb, Bi and a rare earth element, and M is one or more selected from the group consisting of Nb, Hf, Zr, Ta, Mo, W and V. In the composition formula, 0.030≤a≤0.100, 0.050≤b≤0.150, 0≤c≤0.030, 0≤d≤0.030, α≥0, β≥0, and 0≤α+β≤0.50 are satisfied. In the soft magnetic alloy, a content of Ti is 0.001 to 0.100 wt %, a content of Mn is 0.001 to 0.150 wt %, and a content of Al is 0.001 to 0.100 wt %.

公开(公告)号：US20190043646A1

公开(公告)日：2019-02-07

申请号：US16055536

申请日：2018-08-06

Applicant: TDK CORPORATION

Inventor： Kazuhiro YOSHIDOME ,  Akito HASEGAWA ,  Hiroyuki MATSUMOTO ,  Kenji HORINO ,  Akihiro HARADA ,  Syota GOTO ,  Isao NAKAHATA

IPC: H01F1/153

Abstract: A soft magnetic alloy is composed of a Fe-based nanocrystal and an amorphous phase. In the soft magnetic alloy, S2-S1>0 is satisfied, where S1 (at %) denotes an average content rate of Si in the Fe-based nanocrystal and S2 (at %) denotes an average content rate of Si in the amorphous phase. In addition, the soft magnetic alloy has a composition formula of ((Fe(1−(α+β))X1αX2β)(1−(a+b+c+d+e+f))MaBbSicPdCreCuf)1−gCg. X1 is one or more selected from the group consisting of Co and Ni, X2 is one or more selected from the group consisting of Al, Mn, Ag, Zn, Sn, As, Sb, Bi, N, O, S and a rare earth element, and M is one or more selected from the group consisting of Nb, Hf, Zr, Ta, Ti, Mo, V and W. In the composition formula, a to g, α and β are in specific ranges.

公开(公告)号：US20180247746A1

公开(公告)日：2018-08-30

申请号：US15904844

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: H01F1/15308 ,  C22C45/02 ,  H01F1/15333

Abstract: Provided is a soft magnetic alloy including Fe, as a main component, and including B. Among 80000 pieces of a grid having 1 nm×1 nm×1 nm in a continuous measurement range of the soft magnetic alloy, 4000 pieces of the grid from lower Fe content shows B content variation (σB) of 2.8 or more, and an amorphization ratio X of the soft magnetic alloy of 85% or more.

公开(公告)号：US20180247745A1

公开(公告)日：2018-08-30

申请号：US15905027

申请日：2018-02-26

Applicant: TDK CORPORATION

Inventor： Kazuhiro YOSHIDOME ,  Hiroyuki MATSUMOTO ,  Kenji HORINO ,  Akito HASEGAWA ,  Yu YONEZAWA ,  Syota GOTO ,  Hajime AMANO

IPC: H01F1/153 ,  C22C45/02

CPC classification number: H01F1/1535 ,  B22F2998/10 ,  C22C33/003 ,  C22C33/006 ,  C22C33/04 ,  C22C38/002 ,  C22C38/02 ,  C22C38/12 ,  C22C38/16 ,  C22C38/18 ,  C22C45/02 ,  C22C2200/02 ,  C22C2202/02 ,  H01F1/15308 ,  H01F41/0226 ,  H01F41/0246 ,  B22F9/082 ,  B22F1/0085 ,  B22F3/02

Abstract: Provided is a soft magnetic alloy including Fe, as a main component, and including C. the soft magnetic alloy includes an Fe composite network phase having Fe-rich grids connected in a continuous measurement range including 80000 grids, each of which size is 1 nm×1 nm×1 nm. An average of C content ratio of the Fe-poor grids having cumulative frequency of 90% or more from lower C content is 5.0 times or more to an average of C content ratio of the whole soft magnetic alloy.

公开(公告)号：US20180218812A1

公开(公告)日：2018-08-02

申请号：US15881118

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 ,  C22C45/02 ,  C22C38/16 ,  C22C38/14 ,  C22C38/12 ,  C22C38/00

CPC classification number: H01F1/15325 ,  C22C38/002 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C45/00 ,  C22C45/02 ,  C22C2200/02 ,  C22C2200/04 ,  C22C2202/02 ,  H01F1/15308 ,  H01F1/15333

Abstract: A soft magnetic alloy including a compositional formula of ((Fe(1−(α+β))X1αX2β)(1−(a+b+c+e))MaBbPcCue)1−fCf, wherein X1 is one or more selected from the group consisting Co and Ni, X2 is one or more selected from the group consisting of Al, Mn, Ag, Zn, Sn, As, Sb, Bi, N, O, and rare earth elements, “M” is one or more selected from the group consisting of Nb, Hf, Zr, Ta, Ti, Mo, W, and V, 0.030

公开(公告)号：US20180122540A1

公开(公告)日：2018-05-03

申请号：US15794836

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: H01F1/055 ,  C22C38/26 ,  C22C38/16 ,  C22C38/14 ,  C22C38/32 ,  C22C38/00 ,  B22D23/00

CPC classification number: H01F1/0551 ,  B22D23/003 ,  B22F2998/10 ,  B22F2999/00 ,  B82Y30/00 ,  C22C33/02 ,  C22C38/00 ,  C22C38/002 ,  C22C38/005 ,  C22C38/08 ,  C22C38/10 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C22C38/26 ,  C22C38/32 ,  C22C45/02 ,  C22C2200/02 ,  C22C2202/02 ,  H01F1/0556 ,  H01F1/15308 ,  H01F1/15333 ,  B22F9/082 ,  B22F3/02 ,  B22F3/10 ,  B22F2202/05

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. 0.020≤a≤0.060, 0.020≤b≤0.060, 0≤c≤0.030, 0≤d≤0.050, 0≤e≤0.030, 0