US 12,406,787 B2
Soft magnetic alloy powder, dust core, magnetic component, and electronic device
Kazuhiro Yoshidome, Tokyo (JP); Hiroyuki Matsumoto, Tokyo (JP); Kenji Horino, Tokyo (JP); Masakazu Hosono, Tokyo (JP); and Yoshiki Kajiura, Tokyo (JP)
Assigned to TDK CORPORATION, Tokyo (JP)
Filed by TDK CORPORATION, Tokyo (JP)
Filed on Oct. 28, 2019, as Appl. No. 16/665,000.
Claims priority of application No. 2018-205070 (JP), filed on Oct. 31, 2018.
Prior Publication US 2020/0135369 A1, Apr. 30, 2020
Int. Cl. H01F 1/153 (2006.01); C22C 45/02 (2006.01)
CPC H01F 1/15325 (2013.01) [C22C 45/02 (2013.01); H01F 1/15333 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A soft magnetic alloy powder comprising nanocrystals and comprising a main component of (Fe(1−(α+β))X1α×2β)(1−(a+b+c+d+e+f))MaBbPcSidCeSf, where:
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 Nb,
a, b, c, d, e, f, a, and β are atomic ratios, and
0.070≤a≤0.160,
0.020≤b≤0.200,
0.030≤c≤0.050,
0≤d≤0.060,
0≤e≤0.030,
0.0010≤f≤0.030,
0.005≤f/b≤1.50,
0.735≤1−(a+b+c+d+e+f)≤0.900,
α≥0,
β≥0, and
0≤α+β≤0.50 are satisfied,
wherein an average circularity of the soft magnetic alloy powder is 0.95 or more,
the nanocrystals have a bcc phase, and
a compound phase other than a bcc phase in the nanocrystals has a crystallinity of 2% or less.