公开(公告)号：US20190043646A1

公开(公告)日：2019-02-07

申请号：US16055536

申请日：2018-08-06

Applicant: TDK CORPORATION

Inventor： Kazuhiro YOSHIDOME ,  Akito HASEGAWA ,  Hiroyuki MATSUMOTO ,  Kenji HORINO ,  Akihiro HARADA ,  Syota GOTO ,  Isao NAKAHATA

IPC: H01F1/153

Abstract: A soft magnetic alloy is composed of a Fe-based nanocrystal and an amorphous phase. In the soft magnetic alloy, S2-S1>0 is satisfied, where S1 (at %) denotes an average content rate of Si in the Fe-based nanocrystal and S2 (at %) denotes an average content rate of Si in the amorphous phase. In addition, the soft magnetic alloy has a composition formula of ((Fe(1−(α+β))X1αX2β)(1−(a+b+c+d+e+f))MaBbSicPdCreCuf)1−gCg. 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 Al, Mn, Ag, Zn, Sn, As, Sb, Bi, N, O, S and a rare earth element, and M is one or more selected from the group consisting of Nb, Hf, Zr, Ta, Ti, Mo, V and W. In the composition formula, a to g, α and β are in specific ranges.

公开(公告)号：US20180247746A1

公开(公告)日：2018-08-30

申请号：US15904844

申请日：2018-02-26

Applicant: TDK CORPORATION

Inventor： Kazuhiro YOSHIDOME ,  Hiroyuki MATSUMOTO ,  Kenji HORINO ,  Akito HASEGAWA ,  Yu YONEZAWA ,  Syota GOTO ,  Seigo TOKORO

IPC: H01F1/153 ,  C22C45/02

CPC classification number: H01F1/15308 ,  C22C45/02 ,  H01F1/15333

Abstract: Provided is a soft magnetic alloy including Fe, as a main component, and including B. Among 80000 pieces of a grid having 1 nm×1 nm×1 nm in a continuous measurement range of the soft magnetic alloy, 4000 pieces of the grid from lower Fe content shows B content variation (σB) of 2.8 or more, and an amorphization ratio X of the soft magnetic alloy of 85% or more.

公开(公告)号：US20180247745A1

公开(公告)日：2018-08-30

申请号：US15905027

申请日：2018-02-26

Applicant: TDK CORPORATION

Inventor： Kazuhiro YOSHIDOME ,  Hiroyuki MATSUMOTO ,  Kenji HORINO ,  Akito HASEGAWA ,  Yu YONEZAWA ,  Syota GOTO ,  Hajime AMANO

IPC: H01F1/153 ,  C22C45/02

CPC classification number: H01F1/1535 ,  B22F2998/10 ,  C22C33/003 ,  C22C33/006 ,  C22C33/04 ,  C22C38/002 ,  C22C38/02 ,  C22C38/12 ,  C22C38/16 ,  C22C38/18 ,  C22C45/02 ,  C22C2200/02 ,  C22C2202/02 ,  H01F1/15308 ,  H01F41/0226 ,  H01F41/0246 ,  B22F9/082 ,  B22F1/0085 ,  B22F3/02

Abstract: Provided is a soft magnetic alloy including Fe, as a main component, and including C. the soft magnetic alloy includes an Fe composite network phase having Fe-rich grids connected in a continuous measurement range including 80000 grids, each of which size is 1 nm×1 nm×1 nm. An average of C content ratio of the Fe-poor grids having cumulative frequency of 90% or more from lower C content is 5.0 times or more to an average of C content ratio of the whole soft magnetic alloy.

公开(公告)号：US20180218812A1

公开(公告)日：2018-08-02

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 ,  C22C45/02 ,  C22C38/16 ,  C22C38/14 ,  C22C38/12 ,  C22C38/00

CPC classification number: H01F1/15325 ,  C22C38/002 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C45/00 ,  C22C45/02 ,  C22C2200/02 ,  C22C2200/04 ,  C22C2202/02 ,  H01F1/15308 ,  H01F1/15333

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：US20180122540A1

公开(公告)日：2018-05-03

申请号：US15794836

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: H01F1/055 ,  C22C38/26 ,  C22C38/16 ,  C22C38/14 ,  C22C38/32 ,  C22C38/00 ,  B22D23/00

CPC classification number: H01F1/0551 ,  B22D23/003 ,  B22F2998/10 ,  B22F2999/00 ,  B82Y30/00 ,  C22C33/02 ,  C22C38/00 ,  C22C38/002 ,  C22C38/005 ,  C22C38/08 ,  C22C38/10 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C22C38/26 ,  C22C38/32 ,  C22C45/02 ,  C22C2200/02 ,  C22C2202/02 ,  H01F1/0556 ,  H01F1/15308 ,  H01F1/15333 ,  B22F9/082 ,  B22F3/02 ,  B22F3/10 ,  B22F2202/05

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. 0.020≤a≤0.060, 0.020≤b≤0.060, 0≤c≤0.030, 0≤d≤0.050, 0≤e≤0.030, 0