公开(公告)号：US20210301380A1

公开(公告)日：2021-09-30

申请号：US17211970

申请日：2021-03-25

Applicant: TDK CORPORATION

Inventor： Isao NAKAHATA ,  Takuya TSUKAHARA

IPC: C22C45/02 ,  B32B37/12 ,  B32B3/30 ,  B32B15/04 ,  B32B15/092 ,  B32B15/18 ,  H01F3/04 ,  C22C45/04

Abstract: An alloy ribbon that is an alloy ribbon containing a metal as a main component, and has a recess on at least one principal surface, in which a depth of the recess is 5% or more and 75% or less of an average thickness.

公开(公告)号：US20250066889A1

公开(公告)日：2025-02-27

申请号：US18724660

申请日：2022-08-31

Applicant: TDK CORPORATION

Inventor： Kensuke ARA ,  Hajime AMANO ,  Kazuhiro YOSHIDOME ,  Takuya TSUKAHARA

IPC: C22C38/10 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/12 ,  C22C38/14 ,  C22C38/30 ,  C22C38/32

Abstract: This soft magnetic alloy contains Fe, Co, and at least one selected from among M and X. M is at least one selected from among Ti, V, Cr, Zr, Nb, Mo, Hf, Ta, and W. X is at least one selected from among Si, B, C and P. A volume ratio of a portion in which both the content of Fe and the total content of M and X fall within specific ranges have a specific relationship with a volume ratio of a portion in which both the content of Co and the total content of M and X fall within specific ranges

公开(公告)号：US20210304936A1

公开(公告)日：2021-09-30

申请号：US17209422

申请日：2021-03-23

Applicant: TDK CORPORATION

Inventor： Kyotaro ABE ,  Takuya TSUKAHARA ,  Isao NAKAHATA ,  Kazuhiro YOSHIDOME

IPC: H01F3/04 ,  H01F1/153 ,  H01F1/147 ,  C22C1/00 ,  C21D9/56 ,  B22D11/00 ,  C21D6/00 ,  C22C45/02 ,  C22C38/02 ,  C22C19/07

Abstract: The object of the present invention is to provide an alloy ribbon capable of having excellent adhesiveness between the alloy ribbons when a plurality of the alloy ribbons is stacked; and also, to provide a magnetic core using the alloy ribbon. The present invention is an alloy ribbon comprising metals scattered on at least one surface of the alloy ribbon, in which diameters of the scattered metals are 1 μm or more, and the scattered metals include Cu.

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：US20230085009A1

公开(公告)日：2023-03-16

申请号：US17893502

申请日：2022-08-23

Applicant: TDK CORPORATION

Inventor： Kyotaro ABE ,  Isao NAKAHATA ,  Takuya TSUKAHARA

IPC: H01F1/153 ,  C22C45/02 ,  H01F3/04

Abstract: A specific depth at which a concentration of Fe reaches 10 at % is 18 nm or more and 500 nm or less from the first surface, and from the first surface to the specific depth, the concentration of Fe is less than 10 at %, and a positive increase region is present in which the concentration of Fe increases with a substantially positive concentration gradient, in a case where the concentration of Fe is measured in a depth direction from a first surface of a ribbon.

公开(公告)号：US20230079841A1

公开(公告)日：2023-03-16

申请号：US17893463

申请日：2022-08-23

Applicant: TDK CORPORATION

Inventor： Kyotaro ABE ,  Isao NAKAHATA ,  Takuya TSUKAHARA

IPC: H01F1/153 ,  C22C45/02 ,  H01F3/04 ,  H01F41/02

Abstract: Provided a soft magnetic alloy ribbon containing Fe and B. Convex portions having an average convex portion height of 7 nm to 130 nm are present on an alloy surface.

公开(公告)号：US20220328224A1

公开(公告)日：2022-10-13

申请号：US17702972

申请日：2022-03-24

Applicant: TDK CORPORATION

Inventor： Takuya TSUKAHARA ,  Isao NAKAHATA ,  Kazuhiro YOSHIDOME

IPC: H01F1/153 ,  C22C38/16 ,  C22C38/12 ,  C22C38/02 ,  C22C45/02

Abstract: To provide a soft magnetic alloy or the like, from which a magnetic component having a good temperature property of core loss can be obtained. The soft magnetic alloy includes Fe. The soft magnetic alloy includes a crystallite, and an amorphous phase existing around the crystallite. A total area ratio of the crystallite in a cross section of the soft magnetic alloy is 40% or more and less than 60%. An average thickness of the amorphous phase is 3.0 nm or more and 10.0 nm or less. A standard deviation of a thickness of the amorphous phase is 10.0 nm or less.

公开(公告)号：US20210159001A1

公开(公告)日：2021-05-27

申请号：US16952770

申请日：2020-11-19

Applicant: TDK CORPORATION

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

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

Abstract: A soft magnetic alloy ribbon having high corrosion resistance is obtained. The soft magnetic alloy ribbon contains Fe, P, and Si. A maximum point of a concentration of P and a maximum point of a concentration of Si including in 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.