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：US20230095146A1

公开(公告)日：2023-03-30

申请号：US17944834

申请日：2022-09-14

Applicant: TDK CORPORATION

Inventor： Masakazu HOSONO ,  Kazuhiro YOSHIDOME ,  Yoshiki KAJIURA ,  Hiroyuki MATSUMOTO

IPC: B22F9/08

Abstract: A metal powder producing apparatus includes a molten metal supply unit, a cylinder body, and a cooling liquid introduction unit. The molten metal supply unit discharges a molten metal. The cylinder body is capable of being formed with a layer of a cooling liquid for cooling the molten metal on an inner circumference surface of the cylinder body. The cooling liquid introduction unit supplies the cooling liquid to an upper inside of the cylinder body. The inner circumference surface of the upper inside of the cylinder body has a substantially elliptical shape.

公开(公告)号：US20220235446A1

公开(公告)日：2022-07-28

申请号：US17614397

申请日：2020-03-26

Applicant: TDK CORPORATION

Inventor： Hajime AMANO ,  Kazuhiro YOSHIDOME ,  Hiroyuki MATSUMOTO

IPC: C22C45/02 ,  H01F1/153

Abstract: A soft magnetic alloy having high saturation magnetic flux density Bs and low coercivity Hc, and a composition having formula (Fe(1−(α+β))X1αX2β)(1−(a+b+c))MaCbX3c; X1 represents one selected from the group of Co and Ni; X2 represents one selected from the group of Al, Mn, Ag, Zn, Sn, As, Sb, Cu, Cr, Bi, N, O, S, and rare earth elements; M represents one selected from the group of Ta, V, Zr, Hf, Ti, Nb, Mo, and W; X3 represents one selected from the group of P, B, Si, and Ge; and 0≤a≤0.140, 0.005≤b≤0.200, 0

公开(公告)号：US20210304932A1

公开(公告)日：2021-09-30

申请号：US17209440

申请日：2021-03-23

Applicant: TDK CORPORATION

Inventor： Kazuhiro YOSHIDOME ,  Hiroyuki MATSUMOTO

IPC: H01F1/153 ,  C22C45/02

Abstract: To obtain a magnetic core having an improved withstand voltage property while maintaining a high relative magnetic permeability, and the like. The magnetic core contains large particles observed as soft magnetic particles having a Heywood diameter of 5 μm or more and 25 μm or less and small particles observed as soft magnetic particles having a Heywood diameter of 0.5 μm or more and less than 5 μm in a cross section. C1

公开(公告)号：US20210230720A1

公开(公告)日：2021-07-29

申请号：US17119033

申请日：2020-12-11

Applicant: TDK CORPORATION

Inventor： Yoshiki KAJIURA ,  Akito HASEGAWA ,  Kazuhiro YOSHIDOME ,  Hiroyuki MATSUMOTO ,  Hironobu KUMAOKA

IPC: C22C19/07 ,  H01F1/153 ,  B22F1/00

Abstract: A soft magnetic alloy powder has a specific composition in which a Co content is large. A soft magnetic alloy powder has a glass transition point Tg and a melting point Tm, 900° C.≤Tm≤1200° C. is satisfied, or when coercivity when applying a pressure XP to a soft magnetic alloy powder is set as YH, and a straight line obtained by linearly approximating a relationship between XP and YH by a method of least squares is set as YH=kXP+1, k (unit: Oe/MPa) satisfies 0≤k≤0.00100.

公开(公告)号：US20210156011A1

公开(公告)日：2021-05-27

申请号：US16952358

申请日：2020-11-19

Applicant: TDK CORPORATION

Inventor： Takuya TSUKAHARA ,  Isao NAKAHATA ,  Kazuhiro YOSHIDOME ,  Hiroyuki MATSUMOTO

IPC: C22C38/12 ,  H01F1/153 ,  C22C38/02 ,  C22C38/00

Abstract: A soft magnetic alloy ribbon having high corrosion resistance and good magnetic properties is obtained. The soft magnetic alloy ribbon contains Fe and M. M is at least one selected from the group consisting of Nb, Ta, W, Zr, Hf, Mo, Cr, and Ti, and a part of M is included in oxides. A maximum point of a concentration of at least one of M included in the oxides is present in a region within 20 nm from the surface, when a concentration distribution of an element contained in the soft magnetic alloy ribbon is measured from a surface toward an interior of the soft magnetic alloy ribbon in a thickness direction.

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：US20200312499A1

公开(公告)日：2020-10-01

申请号：US16829735

申请日：2020-03-25

Applicant: TDK CORPORATION

Inventor： Hironobu KUMAOKA ,  Akito HASEGAWA ,  Hiroyuki MATSUMOTO ,  Kazuhiro YOSHIDOME

IPC: H01F1/153 ,  C22C45/02

Abstract: A soft magnetic alloy contains Fe as a main element and has an amorphous phase. On a differential scanning calorimetry curve of the soft magnetic alloy, a glass transition temperature Tg is found in a range from 350° C. to 600° C. and three or more exothermic peaks are found in a range from 350° C. to 850° C.

公开(公告)号：US20200303105A1

公开(公告)日：2020-09-24

申请号：US16823394

申请日：2020-03-19

Applicant: TDK CORPORATION

Inventor： Nobuhiro OKUDA ,  Hiroyuki MATSUMOTO ,  Kazuhiro YOSHIDOME

IPC: H01F1/20 ,  H01F3/08

Abstract: The present invention relates to a magnetic core containing soft magnetic powder and a coil component using the magnetic core. The soft magnetic powder has particles each having at least one pore therein, and the number of pores present in a region of 2.5 mm square in a cross section of the magnetic core is 60×(η/80) or more and 10000×(η/80) or less, in which the volume packing density of the soft magnetic powder in the magnetic core is η%.