US 11,894,168 B2
Soft magnetic powder, powder magnetic core, magnetic element, and electronic device
Yasuko Kudo, Hachinohe (JP); Mayu Watanabe, Hachinohe (JP); and Hiroyoshi Otaka, Hachinohe (JP)
Assigned to SEIKO EPSON CORPORATION
Filed by Seiko Epson Corporation, Tokyo (JP)
Filed on Sep. 2, 2021, as Appl. No. 17/465,000.
Application 17/465,000 is a continuation of application No. 15/716,878, filed on Sep. 27, 2017, abandoned.
Claims priority of application No. 2016-191538 (JP), filed on Sep. 29, 2016.
Prior Publication US 2021/0398720 A1, Dec. 23, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. H01F 1/153 (2006.01); H01F 27/255 (2006.01); H01F 27/28 (2006.01); C22C 38/02 (2006.01); C22C 38/16 (2006.01); C22C 38/12 (2006.01); C22C 38/06 (2006.01); C22C 38/14 (2006.01); C22C 38/28 (2006.01); H01F 3/08 (2006.01); C22C 38/26 (2006.01); C22C 38/20 (2006.01); C22C 38/34 (2006.01); C22C 38/32 (2006.01); C22C 38/00 (2006.01); B22F 1/054 (2022.01); C22C 33/00 (2006.01); C22C 33/02 (2006.01); H01F 17/04 (2006.01); H01F 17/06 (2006.01); B22F 9/08 (2006.01); B22F 1/142 (2022.01)
CPC H01F 1/15308 (2013.01) [B22F 1/054 (2022.01); C22C 38/002 (2013.01); C22C 38/02 (2013.01); C22C 38/06 (2013.01); C22C 38/12 (2013.01); C22C 38/14 (2013.01); C22C 38/16 (2013.01); C22C 38/20 (2013.01); C22C 38/26 (2013.01); C22C 38/28 (2013.01); C22C 38/32 (2013.01); C22C 38/34 (2013.01); H01F 1/15333 (2013.01); H01F 3/08 (2013.01); H01F 27/255 (2013.01); H01F 27/28 (2013.01); B22F 1/142 (2022.01); B22F 9/082 (2013.01); B22F 2999/00 (2013.01); C22C 33/003 (2013.01); C22C 33/02 (2013.01); H01F 17/062 (2013.01); H01F 2017/048 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A soft magnetic powder, comprising:
a composition consisting of Fe100-a-b-c-d-e-f-g-hCUaSibBcMdM′eXfAlgTih,
wherein M is at least one element selected from the group consisting of Nb, W, Ta, Zr, Hf, and Mo,
M′ is at least one element selected from the group consisting of V, Cr, Mn, a platinum group element, Sc, Y, Au, Zn, Sn, and Re,
X is at least one element selected from the group consisting of Sb, In, Be, and As, and
where a, b, c, d, e, f, g, and h represent an atomic percentage
0.1≤a≤3,
5<b≤20,
3<c≤20,
5≤b+c≤30,
0.1≤d≤30,
0≤e≤10,
0.1≤f≤5,
0.002≤g≤0.032, and
0.002≤h≤0.038, and
a crystalline structure contained in an amount of 40 vol % or more, the crystalline structure having a particle diameter of 1 nm to 30 nm,
wherein a volume resistivity of a green compact in a compacted state at a pressure of 10 MPa is 1 KΩ·cm or more and 500 Ω·cm or less,
whereon the soft magnetic powder is an atomized powder having an average particle size of 1 μm or more and 40 μm or less, and
wherein a Vickers hardness of particles of the soft magnetic powder is 1000 or more and 3000 or less, as measured in a central portion of a cross-section of each of the particles.