公开(公告)号：US20230245810A1

公开(公告)日：2023-08-03

申请号：US18159313

申请日：2023-01-25

Applicant: TDK CORPORATION

Inventor： Hajime AMANO ,  Kensuke ARA ,  Kazuhiro YOSHIDOME ,  Risako TSURUMARU

IPC: H01F10/13 ,  C22C45/02

CPC classification number: H01F10/131 ,  C22C45/02

Abstract: A nanogranular magnetic film includes a structure including first phases comprised of nano-domains dispersed in a second phase. The first phases include at least one selected from the group consisting of Fe, Co, and Ni. The second phase includes at least one selected from the group consisting of O, N, and F. A ratio of a volume of the first phases to a total volume of the first phases and the second phase is 65% or less. The nanogranular magnetic film has a porosity of 0.17 or more and 0.30 or less.

公开(公告)号：US20220148773A1

公开(公告)日：2022-05-12

申请号：US17519773

申请日：2021-11-05

Applicant: TDK CORPORATION

Inventor： Kensuke ARA ,  Hajime AMANO

IPC: H01F1/153 ,  C22C45/02

Abstract: There is provided a soft magnetic alloy comprising a composition expressed by a formula of (Fe(1-α)Aα)(1-m-x-y)MmXxYy, in which M represents at least one selected from the group consisting of Zr and Hf, X represents at least one selected from the group consisting of Ni, Mn, Cu, Co, Al, and Ge, Y represents at least one selected from the group consisting of B, P, and Si, A represents at least one selected from the group consisting of Ti, V, Cr, Zn, Mg, Sn, Bi, O, N, S, and a rare earth element, m, x, y, and α satisfy relationships of 0.070≤m≤0.120, 0.001≤x≤0.030, 0≤y≤0.010, and 0≤α≤0.100, and the alloy contains Fe-based nanocrystals having an average crystal grain size of 30 nm or less.

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：US20200291507A1

公开(公告)日：2020-09-17

申请号：US16809919

申请日：2020-03-05

Applicant: TDK CORPORATION

Inventor： Kensuke ARA ,  Hajime AMANO

IPC: C22C38/10 ,  C22C38/00 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C21D8/12

Abstract: Provided is a soft magnetic alloy comprising a composition formula (Fe(1−(α+β))X1αX2β)(1−(a+b+c+d+e+f))MaBbPcSidCeZnf. X1 denotes at least one selected from Co and Ni; X2 denotes at least one selected from Cu, Mg, Al, Mn, Ag, Sn, Bi, O, N, S, and rare earth elements; M denotes at least one selected from Ti, V, Cr, Zr, Nb, Mo, Hf, Ta, and W; 0.080≤b≤0.150, 0≤c≤0.060, 0≤d≤0.060, 0≤e≤0.030, 0.0030≤f≤0.080, 0.0030≤a+f≤0.080, b+c≥0.100, α≥0, β≥0, and 0≤α+β≤0.50 are satisfied; and the soft magnetic alloy has Fe-based nanocrystals with a bcc structure.

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