Soft magnetic alloy and magnetic device

Patent metadata

Field	Value
Publication number	US-12165794-B2
Application number	US-201916260715-A
Country	US
Kind code	B2
Filing date	Jan 29, 2019
Priority date	Jan 30, 2018
Publication date	Dec 10, 2024
Grant date	Dec 10, 2024

Abstract

A soft magnetic alloy has a main component of Fe. The soft magnetic alloy contains P. A Fe-rich phase and a Fe-poor phase are contained. An average concentration of P in the Fe-poor phase is 1.5 times or larger than an average concentration of P in the soft magnetic alloy by number of atoms.

First claim

What is claimed is:

1. A soft magnetic alloy comprising:
a main component of Fe; and
P, wherein
a Fe-rich phase and a Fe-poor phase are contained, and
an average concentration of P in the Fe-poor phase is 1.5 times or larger than an average concentration of P in the soft magnetic alloy by number of atoms, and
the soft magnetic alloy consists of a composition formula of (Fe 1-α X α ) (1-(a+b+c+d+e)) Cu a M1 b P c M2 d Si e , in which
X is Co,
M1 is one or more of Ti, Zr, Hf, Nb, Ta, Mo, V, W, Cr, Al, Mn, Zn, La, Y, and S,
M2 is one or more of B and C,
0≤a≤0.001 is satisfied,
0.040≤b≤0.150 is satisfied,
0.001≤c≤0.150 is satisfied,
0≤d≤0.200 is satisfied,
0≤e≤0.200 is satisfied, and
0≤α≤0.500 is satisfied,

wherein a, b, c, d, e and α each represent an atomic ratio.

2. The soft magnetic alloy according to claim 1 , wherein the average concentration of P in the Fe-poor phase is 1.0 at % or more and 50 at % or less.

3. The soft magnetic alloy according to claim 1 , wherein the average concentration of P in the Fe-poor phase is 3.0 times or larger than an average concentration of P in the Fe-rich phase.

4. The soft magnetic alloy according to claim 2 , wherein the average concentration of P in the Fe-poor phase is 3.0 times or larger than an average concentration of P in the Fe-rich phase.

5. The soft magnetic alloy according to claim 1 , comprising Fe based nanocrystallines.

6. The soft magnetic alloy according to claim 5 , wherein the Fe based nanocrystallines have an average grain size of 5 nm or more and 30 nm or less.

7. The soft magnetic alloy according to claim 1 , comprising a ribbon shape.

8. The soft magnetic alloy according to claim 1 , comprising a powder shape.

9. A magnetic device comprising the soft magnetic alloy according to claim 1 .

Assignees

• Tdk Corp

Inventors

• Yoshidome Kazuhiro
• Matsumoto Hiroyuki
• Horino Kenji
• Hasegawa Akito
• Goto Syota
• Hosono Masakazu
• Amano Hajime
• Nakahata Isao

Classifications

• H01F1/14791

  Fe-Si-Al based alloys, e.g. Sendust · CPC title

• H01F1/14775

  in the form of sheets · CPC title

• H01F1/14766

  Fe-Si based alloys · CPC title

• H01F1/14716

  in the form of sheets · CPC title

• H01F1/147 Primary

  Alloys characterised by their composition {(treatment thereof for enhancing their electromagnetic properties C21D8/12)} · CPC title