公开(公告)号：US20230047154A1

公开(公告)日：2023-02-16

申请号：US17879862

申请日：2022-08-03

Applicant: TDK CORPORATION

Inventor： Katsushi YASUHARA ,  Ryoma NAKAZAWA ,  Yusuke TANIGUCHI ,  Hiroyuki ONO

IPC: H01F1/147 ,  C22C38/02 ,  H01F5/00 ,  H01F1/20

Abstract: A soft magnetic alloy powder contains soft magnetic alloy particles. The soft magnetic alloy particles contain Fe and Si. The soft magnetic alloy particles each include crystal grains and crystal grain boundary between the crystal grains. At least one of the crystal grains has a Si segregation part.

公开(公告)号：US20180148853A1

公开(公告)日：2018-05-31

申请号：US15575587

申请日：2015-12-11

Applicant: TDK CORPORATION

Inventor： Ryoma NAKAZAWA ,  Kazuhiro YOSHIDOME

IPC: C25C7/02 ,  B32B15/04 ,  B32B18/00

CPC classification number: C25C7/025 ,  B22F5/00 ,  B22F7/02 ,  B22F7/064 ,  B22F2207/01 ,  B22F2998/10 ,  B22F2999/00 ,  B32B15/043 ,  B32B18/00 ,  B32B2311/12 ,  B32B2311/22 ,  B32B2315/02 ,  C22C29/12 ,  C22C1/05 ,  C22C1/0433 ,  C22C1/0425 ,  B22F1/0059 ,  B22F3/02 ,  B22F3/10 ,  B22F3/162 ,  B22F3/16

Abstract: A composite body has a cermet member, a metal member and an intermediate member. The cermet member includes a cermet oxide phase and a cermet metal phase. The cermet oxide phase contains a Ni-containing oxide or an Fe-containing oxide. The cermet metal phase contains Ni. The intermediate layer contains Cu. The mass proportions of Cu in the cermet metal phase at points which are spaced apart by 10, 50, 100 and 1000 μm from the interface between the cermet member and the intermediate layer to the cermet member side are denoted by C10, C50, C100 and C1000 (mass %). When the mass proportions of Cu in the cermet oxide phase at points which are spaced apart by 10 and 100 μm from the interface to the cermet member side are denoted by M10 and M100 (mass %), C10>C50>C100>C1000, and 5>M10−M100>−5.

公开(公告)号：US20230352231A1

公开(公告)日：2023-11-02

申请号：US18307442

申请日：2023-04-26

Applicant: TDK CORPORATION

Inventor： Katsushi YASUHARA ,  Yuji SEZAI ,  Ryoma NAKAZAWA ,  Hironobu FURUKAWA

IPC: H01F27/28 ,  H01F41/02

CPC classification number: H01F27/2823 ,  H01F41/0246 ,  H01F27/255

Abstract: A coil component including a core part and a coil part formed by winding a conductor in a coil form, in which the coil part is inside of the core part. The core part has a center pole part positioned in an area surrounded by an inner diameter of the coil part. The center pole part includes a first center pole part and a second center pole part each having different predetermined configurations, or the center pole part includes soft magnetic metal particles having predetermined deflection angles and aspect ratios.

公开(公告)号：US20230317333A1

公开(公告)日：2023-10-05

申请号：US18127150

申请日：2023-03-28

Applicant: TDK Corporation

Inventor： Ryoma NAKAZAWA

IPC: H01F1/24 ,  H01F1/33

CPC classification number: H01F1/24 ,  H01F1/33

Abstract: A soft magnetic metal particle having a core particle and an insulation layer formed on a surface of the core particle, wherein the insulation layer includes Ti and an oxide of Si, and



an amount ratio of Ti is within a range of 1.0 mol % or more and 30 mol % or less with respect to a total amount of Si and Ti in the insulation layer.

公开(公告)号：US20180261364A1

公开(公告)日：2018-09-13

申请号：US15913964

申请日：2018-03-07

Applicant: TDK CORPORATION

Inventor： Yousuke FUTAMATA ,  Ryoma NAKAZAWA ,  Takeshi TAKAHASHI ,  Junichi SHIMAMURA

IPC: H01F1/147 ,  H01F3/00

Abstract: A dust core includes a metal magnetic material, a resin, an insulation film, and an intermediate layer. The insulation film covers the metal magnetic material. The intermediate layer exists between the insulation film and the metal magnetic material and contacts therebetween. The metal magnetic material includes 85 to 99.5 wt % of Fe, 0.5 to 10 wt % of Si, and 0 to 5 wt % of other elements, with respect to 100 wt % of the entire metal magnetic material. The intermediate layer includes a Fe—Si—O based oxide. The insulation film includes a Si—O based oxide.

公开(公告)号：US20180087167A1

公开(公告)日：2018-03-29

申请号：US15577059

申请日：2015-05-26

Applicant: TDK CORPORATION ,  RIO TINTO ALCAN INTERNATIONAL LIMITED

Inventor： Kazuhiro YOSHIDOME ,  Ryoma NAKAZAWA

IPC: C25C3/08 ,  B32B9/04 ,  B32B15/04 ,  B32B15/20

CPC classification number: C25C3/08 ,  B22F7/06 ,  B22F7/064 ,  B22F7/08 ,  B22F2201/02 ,  B22F2301/10 ,  B22F2302/25 ,  B22F2999/00 ,  B32B5/16 ,  B32B7/02 ,  B32B9/041 ,  B32B15/04 ,  B32B15/043 ,  B32B15/16 ,  B32B15/20 ,  B32B2250/03 ,  B32B2260/025 ,  B32B2260/046 ,  B32B2264/102 ,  B32B2264/105 ,  B32B2307/202 ,  B32B2307/54 ,  B32B2307/714 ,  B32B2307/748 ,  B32B2457/00 ,  C22C1/0425 ,  C22C1/0433 ,  C22C9/06 ,  C22C19/03 ,  C22C29/12 ,  C25C3/12 ,  C25C7/025 ,  B22F2207/01

Abstract: An assembly body including a cermet member, a metal member and an intermediate member bonded to the cermet member and the metal member, wherein the cermet member includes an oxide phase and a metal phase, the intermediate member includes at least a first intermediate layer and a second intermediate layer, the first intermediate layer is bonded to the cermet member, the first intermediate layer includes at least a first metal M1, the second intermediate layer includes at least a second metal M2, a melting point of the first metal M1 is lower than the second metal M2, a weight concentration of M1 at the first intermediate layer is higher than the weight concentration of M1 at the second intermediate layer, and the weight concentration of M2 at the second intermediate layer is higher than the weight concentration of M2 at the first intermediate layer.