公开(公告)号：US11887760B2

公开(公告)日：2024-01-30

申请号：US17519773

申请日：2021-11-05

Applicant: TDK CORPORATION

Inventor： Kensuke Ara ,  Hajime Amano

IPC: H01F1/153 ,  C22C45/02

CPC classification number: H01F1/15308 ,  C22C45/02 ,  H01F1/15333

Abstract: There is provided a soft magnetic alloy comprising a composition expressed by a formula of (Fe(1-α)Aα)(1-m-x-y)MmXxYy, in which M represents at least one selected from the group consisting of Zr and Hf, X represents at least one selected from the group consisting of Ni, Mn, Cu, Co, Al, and Ge, Y represents at least one selected from the group consisting of B, P, and Si, A represents at least one selected from the group consisting of Ti, V, Cr, Zn, Mg, Sn, Bi, O, N, S, and a rare earth element, m, x, y, and α satisfy relationships of 0.070≤m≤0.120, 0.001≤x≤0.030, 0≤y≤0.010, and 0≤α≤0.100, and the alloy contains Fe-based nanocrystals having an average crystal grain size of 30 nm or less.

公开(公告)号：US11783974B2

公开(公告)日：2023-10-10

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

IPC: H01F1/153 ,  C22C33/00 ,  C22C38/08 ,  C22C38/00 ,  C22C38/06 ,  H01F1/147 ,  C22C33/02 ,  C22C38/10 ,  C22C45/02 ,  C22C38/18 ,  C22C38/04 ,  C22C38/14 ,  C22C38/60 ,  C22C38/12 ,  C22C38/32 ,  B22F1/07 ,  H01F27/25 ,  H01F41/02 ,  B22F9/00 ,  C22C45/00

CPC classification number: H01F1/15333 ,  B22F1/07 ,  C22C33/003 ,  C22C33/02 ,  C22C38/002 ,  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 ,  H01F1/14708 ,  H01F1/15308 ,  H01F1/15325 ,  H01F1/15341 ,  H01F27/25 ,  H01F41/0226 ,  B22F9/002 ,  C22C45/008 ,  C22C2202/02

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

公开(公告)号：US10748688B2

公开(公告)日：2020-08-18

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: C22C38/28 ,  H01F1/153 ,  C22C38/00 ,  C22C38/26 ,  C22C38/42 ,  B82Y25/00 ,  C22C38/48 ,  C22C38/20 ,  C22C38/32 ,  C22C33/02 ,  C22C45/02 ,  H01F41/02

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：US20250111975A1

公开(公告)日：2025-04-03

申请号：US18901045

申请日：2024-09-30

Applicant: TDK Corporation

Inventor： Hajime Amano ,  Kensuke Ara ,  Kazuhiro Yoshidome

IPC: H01F10/13

Abstract: A nanogranular magnetic film includes first phases comprised of nano-domains dispersed in a second phase. The first phases include Fe and Co. The second phase includes a second phase compound including at least one selected from the group consisting of O, N, and F. A measurement range is determined in the nanogranular magnetic film. The measurement range is divided with grids including at least 80,000 grids each measuring 1 nm×1 nm×1 nm. Fe/(Fe+Co) and a concentration of the second phase compound of each of the grids are measured in atomic ratio. Provided that the grids are classified into MX-rich grids and MX-poor grids, a CV of Fe/(Fe+Co) of the MX-rich grids is larger than a CV of Fe/(Fe+Co) of the MX-poor grids.

公开(公告)号：US20250111976A1

公开(公告)日：2025-04-03

申请号：US18901060

申请日：2024-09-30

Applicant: TDK Corporation

Inventor： Hajime Amano ,  Kensuke Ara ,  Kazuhiro Yoshidome

IPC: H01F10/13

Abstract: A nanogranular magnetic film includes first phases comprised of nano-domains dispersed in a second phase. The first phases include Fe and Co. The second phase includes at least one selected from the group consisting of O, N, and F. A CV of Fe/(Fe+Co) of grids is 0.150 or more and 0.500 or less, provided that a measurement range is determined in the nanogranular magnetic film, the measurement range is divided with the grids including at least 80,000 grids each measuring 1 nm×1 nm×1 nm, and Fe/(Fe+Co) of each of the grids is measured in atomic ratio.

公开(公告)号：US11972884B2

公开(公告)日：2024-04-30

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

IPC: H01F1/153 ,  C22C38/42 ,  C22C45/02 ,  H01F1/147 ,  H01F41/02

CPC classification number: H01F1/15325 ,  H01F1/14741 ,  H01F1/15308 ,  H01F1/15333 ,  H01F41/0226 ,  H01F41/0246 ,  C22C38/42 ,  C22C45/02

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

公开(公告)号：US11495377B2

公开(公告)日：2022-11-08

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：US20250140458A1

公开(公告)日：2025-05-01

申请号：US18930457

申请日：2024-10-29

Applicant: TDK CORPORATION

Inventor： Kensuke Ara ,  Kazuhiro Yoshidome

IPC: H01F1/20 ,  C22C38/10 ,  H01F27/255

Abstract: A soft magnetic powder including a soft magnetic particle containing at least one selected from the group consisting of iron and cobalt: wherein the soft magnetic particle satisfies the relation of σFeCo(S)−σFeCo(C)≤0.005, provided that an element distribution obtained by analyzing a surface part of the soft magnetic particle using a 3DAP method is divided into a plurality of grids to calculate a sum of a content ratio of iron and a content ratio of cobalt in each grid.

公开(公告)号：US11328847B2

公开(公告)日：2022-05-10

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

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：US11158443B2

公开(公告)日：2021-10-26

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 ,  C22C38/12 ,  H01F1/153 ,  C22C38/00

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