公开(公告)号：US20230055049A1

公开(公告)日：2023-02-23

申请号：US17758647

申请日：2021-01-15

Applicant: KOLON INDUSTRIES, INC.

Inventor： Su Min KIM ,  Choongnyun Paul KIM

IPC: H02K1/02 ,  H02K5/04 ,  H02K1/12 ,  H02K1/22 ,  C22C38/02 ,  C22C38/16 ,  C22C38/00

Abstract: A soft magnetic core of an inductor or a motor core includes an alloy having a composition of Fe, Si, B, P, Cu, and Y, and the soft magnetic core or the motor core has a composite structure in which crystal grains including Fe are dispersed in an amorphous phase. Also, the alloy is expressed by the compositional formula FeaSibBcPdCueYfCg, wherein a to g satisfy 80≤a≤87, 0≤b≤9, 3≤c≤14, 1≤d≤8, 0.2≤e≤2.5, 0≤f≤3.0, 0≤g≤4.0, and 0≤(e/f)≤4 in terms of atomic percentage value.