公开(公告)号：US20210098162A1

公开(公告)日：2021-04-01

申请号：US17028234

申请日：2020-09-22

Applicant: TDK Corporation

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

IPC: H01F1/153 ,  H01F1/20

Abstract: Provided is a soft magnetic alloy including a Fe-based nanocrystal and metallic glass. A differential scanning calorimetry curve of the soft magnetic alloy has a glass transition point Tg, a temperature rising rate of the soft magnetic alloy in measurement of the differential scanning calorimetry curve is 40 K/minute, and a temperature Tp of a maximum exothermic peak in the differential scanning calorimetry curve is higher than the Tg.

公开(公告)号：US20210035726A1

公开(公告)日：2021-02-04

申请号：US16967934

申请日：2019-03-01

Applicant: TDK CORPORATION

Inventor： Isao NAKAHATA ,  Hiroyuki MATSUMOTO ,  Osamu HIROSE

IPC: H01F27/25 ,  H01F27/28 ,  H01F41/02

Abstract: A magnetic core excellent in productivity, having stable magnetic characteristics, and easy to handle for a coil device including a conductor and is formed by stacking a plurality of soft magnetic thin ribbons divided into small pieces.

公开(公告)号：US20210020342A1

公开(公告)日：2021-01-21

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：US20200377982A1

公开(公告)日：2020-12-03

申请号：US16971477

申请日：2019-02-15

Applicant: TDK CORPORATION

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

IPC: C22C45/02 ,  C21D9/52 ,  B22F9/08 ,  B22F1/00

Abstract: Provided is a soft magnetic alloy which has high saturation flux density, low coercivity, and a high specific resistance, and is represented by the compositional formula (Fe(1−(α+β))X1αX2β)(1−(a+b+c+d+e))MaSibCucX3dBe, 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, 0.020≤b≤0.175, 0≤c≤0.020, 0≤d≤0.100, 0≤e≤0.030, α≥0, β≥0, and 0≤α+β≤0.55).

公开(公告)号：US20190355498A1

公开(公告)日：2019-11-21

申请号：US16413848

申请日：2019-05-16

Applicant: TDK CORPORATION

Inventor： Kazuhiro YOSHIDOME ,  Hiroyuki MATSUMOTO ,  Kenji HORINO ,  Satoko MORI ,  Masakazu HOSONO ,  Yoshiki KAJIURA

IPC: H01F1/153 ,  H01F1/147 ,  C22C38/00 ,  C22C38/04 ,  C22C38/06 ,  C22C38/60 ,  C22C38/16

Abstract: Disclosed is a soft magnetic powder including a main component represented by composition formula: (Fe(1-(α+β))X1αX2β)(1-(a+b+c+d+e+f))MaBbPcSidCeSf. X1 represents one or more selected from the group consisting of Co and Ni; X2 represents one or more selected from the group consisting of Al, Mn, Ag, Zn, Sn, As, Sb, Cu, Cr, Bi, N, and rare earth elements; and M represents one or more selected from the group consisting of Nb, Hf, Zr, Ta, Mo, W, Ti, and V. The following relations are satisfied: 0≤a≤0.140; 0.020

公开(公告)号：US20190279797A1

公开(公告)日：2019-09-12

申请号：US16296394

申请日：2019-03-08

Applicant: TDK CORPORATION

Inventor： Takuma NAKANO ,  Kazuhiro YOSHIDOME ,  Hiroyuki MATSUMOTO ,  Satoko MORI ,  Seigo TOKORO ,  Kenji HORINO

IPC: H01F1/153 ,  H01F1/147

Abstract: Soft magnetic metal powder which includes a plurality of soft magnetic metal particles configured by a Fe-based nanocrystal alloy including Cu is provided, wherein the soft magnetic metal particles have core portions and first shell portions surrounding circumferences of the core portions; when an average crystallite size of Cu crystallites existing in the core portions is set as A, and the largest crystallite size of Cu crystallites existing in the first shell portions is set as B, B/A is 3.0 or more and 1000 or less

公开(公告)号：US20190279796A1

公开(公告)日：2019-09-12

申请号：US16296559

申请日：2019-03-08

Applicant: TDK CORPORATION

Inventor： Masakazu HOSONO ,  Hiroyuki MATSUMOTO ,  Kenji HORINO ,  Kazuhiro YOSHIDOME ,  Isao NAKAHATA ,  Akito HASEGAWA ,  Hajime AMANO

IPC: H01F1/153 ,  H01F1/147 ,  H01F27/24

Abstract: Soft magnetic alloy powder includes plurality of soft magnetic alloy particles of soft magnetic alloy represented by composition formula (Fe(1−(α+β))X1αX2β)(1−(a+b+c++e+f+g))MaBbPcSidCeSfTig, wherein X1 represents Co and/or Ni; X2 represents at least one selected from group consisting of Al, Mn, Ag, Zn, Sn, As, Sb, Cu, Cr, Bi, N, O, and rare earth elements; M represents at least one selected from group consisting of Nb, Hf, Zr, Ta, Mo, W, and V; 0.020≤a≤0.14, 0.020

公开(公告)号：US20180218813A1

公开(公告)日：2018-08-02

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 ,  H01F41/02 ,  H01F27/25

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：US20180096766A1

公开(公告)日：2018-04-05

申请号：US15718757

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 ,  C22C38/12 ,  C22C38/16 ,  C22C38/02

CPC classification number: H01F1/14766 ,  C22C38/02 ,  C22C38/12 ,  C22C38/16 ,  C22C2202/02 ,  H01F1/15308 ,  H01F1/15333

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. A virtual-line total distance per 1 μm3 of the soft magnetic alloy is 10 mm to 25 mm provided that the virtual-line total distance is a sum of virtual lines linking the maximum points adjacent each other. A virtual-line average distance that is an average distance of the virtual lines is 6 nm or more and 12 nm or less.

公开(公告)号：US20220351884A1

公开(公告)日：2022-11-03

申请号：US17763865

申请日：2020-09-30

Applicant: TDK Corporation

Inventor： Hajime AMANO ,  Kazuhiro YOSHIDOME ,  Kenji HORINO ,  Hiroyuki MATSUMOTO

IPC: H01F1/153 ,  C22C45/02

Abstract: A soft magnetic alloy contains Fe and at least one of metalloid element. An amorphous material and a nanocrystal having a grain size of 5 to 30 nm are mixed. A coefficient of determination between an atomic concentration of Fe and an atomic concentration of the at least one of metalloid element is 0.700 or more.