US 11,866,810 B2
Alloy powder, nanocrystalline powder and magnetic core
Akiri Urata, Sendai (JP); Yosuke Imano, Sendai (JP); Makoto Yamaki, Sendai (JP); Naoto Onishi, Sendai (JP); Masato Kuno, Sendai (JP); Takuya Takashita, Tokyo (JP); and Makoto Nakaseko, Tokyo (JP)
Assigned to TOKIN CORPORATION, Miyagi (JP)
Filed by TOKIN CORPORATION, Sendai (JP)
Filed on Sep. 16, 2022, as Appl. No. 17/946,161.
Claims priority of application No. 2021-154591 (JP), filed on Sep. 22, 2021.
Prior Publication US 2023/0085762 A1, Mar. 23, 2023
Int. Cl. B22F 1/054 (2022.01); B22F 9/08 (2006.01); H01F 1/147 (2006.01); H01F 27/255 (2006.01); H01F 1/153 (2006.01); C22C 38/02 (2006.01); B82Y 30/00 (2011.01); C22C 38/16 (2006.01); C22C 38/00 (2006.01); H01F 41/02 (2006.01)
CPC C22C 38/02 (2013.01) [B22F 1/054 (2022.01); B82Y 30/00 (2013.01); C22C 38/002 (2013.01); C22C 38/16 (2013.01); H01F 41/02 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An alloy powder comprising particles, wherein:
the particles include specific particles;
each of the specific particles has a surface layer on which a divided trace is formed, the divided trace being a mark at which molten alloy is divided;
each of the specific particles has an oxide layer located under the surface layer, wherein the oxide layer located just under the divided trace has a thickness that is thicker than a thickness of the oxide layer located not just under the divided trace; and
the divided trace is a combination of a crater structure and a hill-like ridge aggregate structure located around the crater structure, the hill-like ridge aggregate structure being an aggregate of a plurality of hill-like ridges.