US 11,887,761 B2
Soft magnetic alloy and magnetic component
Hironobu Kumaoka, Tokyo (JP); Kazuhiro Yoshidome, Tokyo (JP); Hiroyuki Matsumoto, Tokyo (JP); and Akito Hasegawa, Tokyo (JP)
Assigned to TDK CORPORATION, Tokyo (JP)
Filed by TDK CORPORATION, Tokyo (JP)
Filed on Feb. 15, 2022, as Appl. No. 17/672,373.
Claims priority of application No. 2021-061027 (JP), filed on Mar. 31, 2021.
Prior Publication US 2022/0319748 A1, Oct. 6, 2022
Int. Cl. H01F 1/153 (2006.01); C22C 45/02 (2006.01); C22C 45/04 (2006.01)
CPC H01F 1/15308 (2013.01) [C22C 45/02 (2013.01); C22C 45/04 (2013.01); H01F 1/15333 (2013.01); C22C 2202/02 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A soft magnetic alloy comprising
an internal area having a soft magnetic type alloy composition including Fe and P (phosphorous), and
a P concentrated area existing closer to a surface side than the internal area and having a higher P concentration than in the internal area, wherein
the internal area occupies at least 90 vol % of a volume of the soft magnetic alloy,
an average thickness of the P concentrated area is 0.3 nm or more and 30 nm or less,
the soft magnetic type alloy composition satisfies a compositional formula of ((Fe(1−(α+β)CoαNiβ)1-yX1γ)(1−(a+b+c+d+e)BaPbSicCdCre, X1 is at least one selected from Ti, Zr, Hf, Nb, Ta, Mo, W, Al, Ga, Ag, Zn, S, Ca, Mg, V, Sn, As, Sb, Bi, N, O, Au, Cu, rare earth elements, and platinum group elements, 0≤α≤0.700, 0≤β≤0.200, 0≤γ≤0.030, 0.720≤(1−(a+b+c+d+e))≤0.950, 0≤a≤0.200, 0.001≤b≤0.100, 0≤c≤0.150, 0≤d≤0.050, and 0≤e≤0.050.