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US 12,624,430 B2Granted
Iron alloy particle and method for producing iron alloy particle
AssigneeMurata Manufacturing Co., Ltd.
InventorManabu Nakano
Life of this patent
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Abstract
The iron alloy particle is a particle including an iron alloy. The particle includes multiple mixed-phase particles, each including nanocrystals of 10 nm or more and 100 nm or less (i.e., from 10 nm to 100 nm) in crystallite size and an amorphous phase; and a grain boundary layer between the mixed-phase particles. Also, the iron alloy has a composition containing Fe, Si, P, B, C, and Cu.
Claims2
A method for producing iron alloy particles, comprising:
- applying a shearing process to an amorphous material comprising an iron alloy that includes Fe, Si, P, B, C, and Cu to plastically deform the amorphous material into particles and introduce a grain boundary layer into the particles;
- and
- applying a heat treatment to the particles with the grain boundary layer to precipitate, in the particles, nanocrystals of from 10 nm to 100 nm in crystallite size, wherein
- the shearing process is performed with a high-speed rotary grinder, and
- a rotor of the high-speed rotary grinder has a circumferential speed of 40 m/s or greater.
2 more elements
Dependencies are inferred from the claim text.