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US 10,854,365 B2Granted
Soft magnetic alloy and magnetic device
AssigneeTDK Corporation
InventorsKazuhiro Yoshidome, Hiroyuki Matsumoto, Kenji Horino, Akito Hasegawa, Yu Yonezawa, Syota Goto, Seigo Tokoro
Life of this patent
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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.
Claims14
A soft magnetic alloy comprising Fe, as a main component, and B, wherein:
- the soft magnetic alloy comprises FeaCubM1cSidBeCf, where:
- a, b, c, d, e, and f represent atomic percent of Fe, Cu, M1, Si, B, and C, respectively,
- a+b+c+d+e+f=100,
- 0.0≤b≤3.0,
- 0.0≤c≤10.0,
- 0.0≤d≤17.5,
- 5.0≤e≤13.0,
- 0.0≤f≤7.0, and
- M1 is one or more selected from a group consisting of Nb, Ti, Zr, Hf, V, Ta, Mo, P and Cr,
- 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 having a lower Fe content than remaining pieces of the grid show a B content variation (σB) of 2.8 or more, and
- an amorphization ratio X of the soft magnetic alloy represented by the following formula (1) is 85% or more,
- X=100−(Ic/(Ic+Ia)×100) (1)
- where:
- Ic is crystalline scattering integrated intensity, and
- Ia is amorphous scattering integrated intensity.
12 more elements
A soft magnetic alloy comprising Fe, as a main component, and B, wherein:
- the soft magnetic alloy comprises FeαM2βBγCΩ, where:
- α,β,γ, and Ω represented atomic percent of Fe, M2, B, and C, respectively,
- α+β+γ+Ω=100,
- 1.0≤β≤20.0,
- 2.0≤γ≤20.0,
- 0.0≤Ω≤7.0, and
- M2 is one or more selected from a group consisting of Nb, Cu, Zr, Hf, Ti, V, Ta, Mo, P, Si and Cr,
- 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 having a lower Fe content than remaining pieces of the grid show a B content variation (σB) of 2.8 or more, and
- an amorphization ratio X of the soft magnetic alloy represented by the following formula (1) is 85% or more,
- X=100−(Ic/(Ic+Ia)×100) (1)
- where:
- Ic is crystalline scattering integrated intensity, and
- Ia is amorphous scattering integrated intensity.
10 more elements
Dependencies are inferred from the claim text.