Tdk Corporation

Akito Hasegawa

Kazuhiro Yoshidome

Hiroyuki Matsumoto

Kenji Horino

Hajime Amano

Akihiro Harada

Seigo Tokoro

Kensuke Ara

Satoko Mori

Masakazu Hosono

Syota Goto

Hironobu Kumaoka

Isao Nakahata

Yu Yonezawa

Takuma Nakano

Masahito Koeda

Shota Otsuka

Hideaki Yokota

A soft magnetic alloy includes a main body and a surface layer. The main body has a soft magnetic alloy composition including Fe and Co. The surface layer is located on a surface side of the main body. A ratio of Co concentration to a sum of Co concentration and Fe concentration in the surface layer is Co/(Fe+Co). A distribution of Co/(Fe+Co) in a thickness direction of the surface layer includes a local minimum point and one or more local maximum points.

Soft magnetic alloy, dust core, and magnetic device

A soft magnetic alloy or the like combines high saturated magnetic flux density, low coercive force and high magnetic permeability μ'. A soft magnetic alloy having the composition formula (FeX1X2)BSiCCuM. X1 is one or more elements selected from the group consisting of Co and Ni, X2 is one or more elements selected from the group consisting of Al, Mn, Ag, Zn, Sn, As, Sb, Bi, N, O and rare earth elements, and M is one or more elements selected from the group consisting of Nb, Hf, Zr, Ta, Ti, Mo, μ′ and V. 0.090≤a≤0.240, 0.030.

Soft magnetic alloy and magnetic component

A soft magnetic alloy has a main component of Fe. The soft magnetic alloy contains P. A Fe-rich phase and a Fe-poor phase are contained. An average concentration of P in the Fe-poor phase is 1.5 times or larger than an average concentration of P in the soft magnetic alloy by number of atoms.

Soft magnetic alloy and magnetic device

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.

Soft magnetic metal alloy and electronic component

A soft magnetic alloy including an internal area having a soft magnetic type alloy composition including Fe and Co, a Co concentrated area existing closer to a surface side than the internal area and having a higher Co concentration than in the internal area, and a Co concentration degree of the Co concentrated area is larger than 1.2.

Soft magnetic alloy and magnetic component technical field

A soft magnetic alloy powder includes a particle body and a surface layer. The particle body comprises a soft magnetic alloy including Fe and Co. The surface layer is located on a surface side of the particle body. The surface layer includes one or more local maximum points of Si concentration and one or more local maximum points of Co concentration. The surface layer satisfies D≤D, in which Dis a distance from an interface between the particle body and the surface layer to a first Si local maximum point L, and Dis a distance from the interface to a first Co local maximum point L.

Soft magnetic alloy powder comprising Fe, Co and Si, dust core, and magnetic device

Provided is a soft magnetic metal powder including a plurality of soft magnetic metal particles. Each of the soft magnetic metal particles includes a metal particle and an oxidized part covering the metal particle. The metal particle includes at least Fe. The oxidized part includes at least one kind of element of S and an element M. The element M is at least one kind of element selected from the group consisting of Nb, Ta, W, Zr, Hf, and Cr. A unit of a concentration of each of S and the element M in the metal particle and the oxidized part is atom %. The concentration of S or the element M in the metal particle and the oxidized part has a maximum value in the oxidized part.

Soft magnetic metal powder comprising a metal oxide covering, and electronic component

A soft magnetic alloy includes a main component of (FeX1X2)MBPSiC. X1 is one or more of Co and Ni. X2 is one or more of Al, Mn, Ag, Zn, Sn, As, Sb, Cu, Cr, Bi, N, O, and rare earth elements. M is one or more of Nb, Hf, Zr, Ta, Mo, W, and V. 0.020≤a≤0.14 is satisfied. 0.020<b≤0.20 is satisfied. 0≤d≤0.060 is satisfied. α≥0 is satisfied. β≥0 is satisfied. 0≤α+β≤0.50 is satisfied. c and e are within a predetermined range. The soft magnetic alloy has a nanohetero structure or a structure of Fe based nanocrystallines.

A soft magnetic alloy including an internal area having a soft magnetic type alloy composition including Fe and P (phosphorous), and

A soft magnetic alloy comprising an internal area having a soft magnetic type alloy composition including Fe and Co, a Co concentrated area existing closer to a surface side than the internal area and having a higher Co concentration than in the internal area, a SB concentrated area existing closer to the surface side than the Co concentrated area and having a higher concentration of at least one element selected from Si and B than in the internal area, and a Fe concentrated area including Fe existing closer to the surface side than the SB concentrated area; wherein a crystalized area ratio of the SB concentrated area represented by S/Sand a crystalized area ratio of the Fe concentrated area represented by S/S, satisfy a relation of (S/S)<(S/S).

A soft magnetic alloy including an internal area having a soft magnetic type alloy composition including Fe and Co, a Co concentrated area existing closer to a surface side than the internal area and having a higher Co concentration than in the internal area, and a SB concentrated area existing closer to the surface side than the Co concentrated area and having a higher concentration of at least one element selected from Si and B than in the internal area.

A soft magnetic alloy comprising a main component having a compositional formula of ((FeX1X2)MBCr)C, 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&#x2264;a&#x2264;0.14, 0.005&#x2264;b&#x2264;0.20, 0&#x3c;c&#x2264;0.040, 0&#x2264;d&#x2264;0.040, &#x3b1;&#x2265;0, &#x3b2;&#x2265;0, and 0&#x2264;&#x3b1;+&#x3b2;&#x2264;0.50 are satisfied, when soft magnetic alloy is 100 wt %, P is 0.001 to 0.050 wt %, S is 0.001 to 0.050 wt %, and Ti is 0.001 to 0.080 wt %, and when a value obtained by dividing P by S is P/S, then P/S satisfies 0.10&#x2264;P/S&#x2264;10.

A soft magnetic alloy includes a composition of (FeX1X2)MTiBPSiSC. X1 is one or more of Co and Ni. X2 is one or more of Al, Mn, Ag, Zn, Sn, As, Sb, Cu, Cr, Bi, N, O, and rare earth elements. M is one or more of Nb, Hf, Zr, Ta, Mo, W, and V. 0.020&#x2264;a+b&#x2264;0.140, 0.001&#x2264;b&#x2264;0.140, 0.020&#x3c;c&#x2264;0.200, 0.010&#x2264;d&#x2264;0.150, 0&#x2264;e&#x2264;0.060, a&#x2265;0, f&#x2265;0, g&#x2265;0, a+b+c+d+e+f+g&#x3c;1, &#x3b1;&#x2265;0, &#x3b2;&#x2265;0, and 0&#x2264;&#x3b1;+&#x3b2;&#x2264;0.50 are satisfied. The soft magnetic alloy has a nanohetero structure or a structure of Fe-based nanocrystalline.

A soft magnetic alloy or the like combining high saturated magnetic flux density, low coercive force and high magnetic permeability &#x3bc;' having the composition formula (FeX1X2)BSiCCuM. X1 is one more elements selected from the group consisting of Co and Ni, X2 is one or more elements selected from the group consisting of Al, Mn, Ag, Zn, Sn, As, Sb, Bi, N, O and rare earth elements, and M is one or more elements selected from the group consisting of Nb, Hf, Zr, Ta, Ti, Mo, W and V. 0.140&#x3c;a&#x2264;0.240, 0&#x2264;b&#x2264;0.030, 0&#x3c;c&#x3c;0.080, 0&#x3c;d&#x2264;0.020, 0&#x2264;e&#x2264;0.030, &#x3b1;&#x2265;0, &#x3b2;&#x2265;0, and 0&#x2264;&#x3b1;+&#x3b2;&#x2264;0.50 are satisfied.

Provided is a soft magnetic alloy which has high saturation flux density and low coercivity and is represented by the compositional formula (FeX1X2)MPSiCuX3B, 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&#x2264;a&#x2264;0.120, 0.010&#x2264;b&#x2264;0.150, 0&#x2264;c&#x2264;0.050, 0&#x2264;d&#x2264;0.020, 0&#x2264;e&#x2264;0.100, 0&#x2264;f&#x2264;0.030, &#x3b1;&#x2265;0, &#x3b2;&#x2265;0, and 0&#x2264;&#x3b1;+&#x3b2;&#x2264;0.55.

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Tokyo, Japan

Akito Hasegawa