公开(公告)号：US11508502B2

公开(公告)日：2022-11-22

申请号：US16766161

申请日：2018-08-21

Applicant: TDK CORPORATION

Inventor： Akihiro Harada ,  Akito Hasegawa ,  Kazuhiro Yoshidome ,  Kenji Horino ,  Hiroyuki Matsumoto

IPC: H01F1/153 ,  C22C38/10 ,  C22C38/12 ,  C22C38/16 ,  C22C38/26 ,  C22C38/06 ,  C22C38/08 ,  C22C38/14 ,  C22C38/00 ,  C22C45/02 ,  C21D6/00 ,  H01F1/147 ,  C22C38/02 ,  H01F1/12 ,  B22F1/00 ,  B22F3/00 ,  H01F1/14 ,  C22C45/00

Abstract: A soft magnetic alloy or the like combining high saturated magnetic flux density, low coercive force and high magnetic permeability μ′ having the composition formula (Fe(1−(α+β))X1αX2β)(1−(a+b+c+d+e))BaSibCcCudMe. X1 is one more elements selected from the group consisting of Co and Ni, X2 is one or more elements selected from the group consisting of Al, Mn, Ag, Zn, Sn, As, Sb, Bi, N, O and rare earth elements, and M is one or more elements selected from the group consisting of Nb, Hf, Zr, Ta, Ti, Mo, W and V. 0.140

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：US12211634B2

公开(公告)日：2025-01-28

申请号：US16765915

申请日：2018-08-21

Applicant: TDK CORPORATION

Inventor： Akihiro Harada ,  Akito Hasegawa ,  Kazuhiro Yoshidome ,  Kenji Horino ,  Hiroyuki Matsumoto

IPC: H01F1/153 ,  C22C38/02 ,  C22C38/16 ,  C22C45/02

Abstract: A soft magnetic alloy or the like combines high saturated magnetic flux density, low coercive force and high magnetic permeability μ′. A soft magnetic alloy having the composition formula (Fe(1−(α+β))X1αX2β)(1−(a+b+c+d+e))BaSibCcCudMe. X1 is one or more elements selected from the group consisting of Co and Ni, X2 is one or more elements selected from the group consisting of Al, Mn, Ag, Zn, Sn, As, Sb, Bi, N, O and rare earth elements, and M is one or more elements selected from the group consisting of Nb, Hf, Zr, Ta, Ti, Mo, μ′ and V. 0.090≤a≤0.240, 0.030.

公开(公告)号：US11569014B2

公开(公告)日：2023-01-31

申请号：US16415722

申请日：2019-05-17

Applicant: TDK CORPORATION

Inventor： Hideharu Moro ,  Akihiro Harada ,  Masahito Koeda

IPC: H01F1/24 ,  H01F27/255 ,  H01F3/08 ,  B22F1/052

Abstract: A dust core includes large particles having an average particle size of 8-15 μm, medium particles having an average particle size of 1-5 μm, and small particles having an average particle size of 300-900 nm when a cross section thereof is observed. An area ratio occupied by the large particles is 50% to 90%, an area ratio occupied by the medium particles is 0% to 30%, and an area ratio occupied by the small particles is 5% to 30%, when a total area ratio occupied by the large particles, the medium particles and the small particles is 100% in the cross section. Vickers hardness (Hv) of the large particles, the medium particles and the small particles is 150-600 respectively. The small particles are alloy powder containing Fe and at least Si or N. The dust core may be included in an inductor element.

公开(公告)号：US11628500B2

公开(公告)日：2023-04-18

申请号：US17363109

申请日：2021-06-30

Applicant: TDK CORPORATION

Inventor： Kenji Horino ,  Kazuhiro Yoshidome ,  Akihiro Harada ,  Hiroyuki Matsumoto

IPC: B22F9/08

Abstract: A metal powder producing apparatus comprising a melted metal supplying part discharging a melted metal, a cylinder body provided below the melted metal supplying part, and a cooling liquid layer forming part forming a flow of a cooling liquid for cooling the melted metal discharged from the melted metal supplying part along an inner circumference face of the cylinder body, wherein the cooling liquid layer forming part has a primary pressure reservoir, and the primary pressure reservoir is provided on an outer circumference part of the cylinder body.

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

公开(公告)号：US10991495B2

公开(公告)日：2021-04-27

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 ,  H01F41/02 ,  H01F1/153

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：US10923258B2

公开(公告)日：2021-02-16

申请号：US16197996

申请日：2018-11-21

Applicant: TDK CORPORATION

Inventor： Hideharu Moro ,  Akihiro Harada ,  Yu Yonezawa

IPC: H01F1/24 ,  B22F1/00 ,  H01F27/255 ,  H01F3/08 ,  C22C33/02

Abstract: A dust core excellent in DC superimposition characteristics and low in eddy current loss at a high frequency band of several MHz, and an inductor element using the dust core. A dust core contains large and small particles of insulated soft magnetic material powder, wherein the large and small particles have a saturation magnetic flux density of 1.4 T or more, and wherein in the soft magnetic material powder observed in a cross section of the dust core, a ratio of an area occupied by large particles to an area occupied by small particles in the cross section is 9:1 to 5:5, when a group of particles having particle size of 3 μm or more and 15 μm or less is defined as the large particles, and group of particles having a particle size of 300 nm or more and 900 nm or less is defined as the small particles.