	US 12,104,230 B2
	Pressed powder material and rotating electric machine
Masaya Hagiwara, Yokohama Kanagawa (JP); Tomohiro Suetsuna, Kawasaki Kanagawa (JP); Naoyuki Sanada, Kawasaki Kanagawa (JP); and Hiroaki Kinouchi, Meguro Tokyo (JP)
Assigned to Kabushiki Kaisha Toshiba, Tokyo (JP)
Filed by KABUSHIKI KAISHA TOSHIBA, Tokyo (JP)
Filed on Sep. 3, 2021, as Appl. No. 17/466,784.
Claims priority of application No. 2021-046801 (JP), filed on Mar. 22, 2021.
Prior Publication US 2022/0298613 A1, Sep. 22, 2022
Int. Cl. C22C 38/10 (2006.01); B22F 1/05 (2022.01); C22C 38/02 (2006.01); H02K 1/02 (2006.01)

CPC C22C 38/10 (2013.01) [B22F 1/05 (2022.01); C22C 38/02 (2013.01); H02K 1/02 (2013.01); B22F 2301/35 (2013.01); B22F 2304/10 (2013.01); C22C 2202/02 (2013.01)]

9 Claims

1. A pressed powder material comprising:

first magnetic metal particles having a first magnetic metal phase containing Fe and Co; and

second magnetic metal particles having a second magnetic metal phase containing Fe,

wherein when amounts of Co with respect to the total amounts of Fe and Co of the first and second magnetic metal particles are designated as Co1 and Co2, respectively, the ratio of Co2 to Co1 (Co2/Co1) is from 0 to 0.5, the average value of the ratio of the major axis to the minor axis is 2 or greater for the first magnetic metal particles and greater than 1.2 for the second magnetic metal particles, the second magnetic metal particles are present between the first magnetic metal particles, the average value of the major axis of the second magnetic metal particles is equal to or longer than the average value of the major axis of the first magnetic metal particles, and the average value of the major axis of the first magnetic metal particles is from 1 μm to 500 μm, and

wherein when the relationship between the value of the major axis and the ratio of the major axis to the minor axis of the second magnetic metal particles is subjected to linear approximation, the gradient is from 0.005/μm to 0.07/μm.