Soft magnetic alloy and magnetic device

Patent metadata

Field	Value
Publication number	US-10535455-B2
Application number	US-201815880920-A
Country	US
Kind code	B2
Filing date	Jan 26, 2018
Priority date	Jan 30, 2017
Publication date	Jan 14, 2020
Grant date	Jan 14, 2020

Abstract

A soft magnetic alloy including a main component having a compositional formula of (Fe(1−(α+β))X1αX2β)(1−(a+b+c))MaBbPc, and a sub component including at least C, S and Ti, wherein X1 is one or more selected from the group including Co and Ni, X2 is one or more selected from the group including Al, Mn, Ag, Zn, Sn, As, Sb, Bi, and rare earth elements, “M” is one or more selected from the group including Nb, Hf, Zr, Ta, Mo, W, and V, 0.020≤a≤0.14, 0.020≤b≤0.20, 0≤c≤0.040, α≥0, β≥0, and 0≤α+β≤0.50 are satisfied, when entire said soft magnetic alloy is 100 wt %, a content of said C is 0.001 to 0.050 wt %, a content of said S is 0.001 to 0.050 wt %, and a content of said Ti is 0.001 to 0.080 wt %, and when a value obtained by dividing the content of said C by the content of said S is C/S, then C/S satisfies 0.10≤C/S≤10.

First claim

The invention claimed is:

1. A soft magnetic alloy comprising a main component having a compositional formula of (Fe (1−(α+β)) X1 α X2 β ) (1−(a+b+c)) M a B b P c , and a sub component including at least C, S and Ti, wherein
X1 is one or more selected from the group consisting of Co and Ni,
X2 is one or more selected from the group consisting of Al, Mn, Ag, Zn, Sn, As, Sb, Bi, and rare earth elements,
“M” is one or more selected from the group consisting of Nb, Hf, Zr, Ta, Mo, W, and V,
0.020≤a≤0.14,
0.020≤b≤0.20,
0≤c≤0.040,
α≥0,
β≥0, and
0≤α+β≤0.50 are satisfied,
when entire said soft magnetic alloy is 100 wt %,
a content of said C is 0.001 to 0.050 wt %, a content of said S is 0.001 to 0.050 wt %, and a content of said Ti is 0.001 to 0.080 wt %, and
when a value obtained by dividing the content of said C by the content of said S is C/S, then C/S satisfies 0.10≤C/S≤10.

2. The soft magnetic alloy as set forth in claim 1 , wherein 0.73≤1−(a+b+c)≤0.93 is satisfied.

3. The soft magnetic alloy as set forth in claim 1 , wherein 0≤α{1−(a+b+c)}≤0.40 is satisfied.

4. The soft magnetic alloy as set forth in claim 1 , wherein α=0 is satisfied.

5. The soft magnetic alloy as set forth in claim 1 , wherein 0≤β{1−(a+b+c)}≤0.030 is satisfied.

6. The soft magnetic alloy as set forth in claim 1 , wherein β=0 is satisfied.

7. The soft magnetic alloy as set forth in claim 1 , wherein α=β=0 is satisfied.

8. The soft magnetic alloy as set forth in claim 1 comprising a nanohetero structure composed of an amorphous phase and initial fine crystals, and said initial fine crystals exist in said amorphous phase.

9. The soft magnetic alloy as set forth in claim 8 , wherein the initial fine crystals have an average grain size of 0.3 to 10 nm.

10. The soft magnetic alloy as set forth in claim 1 comprising a structure composed of Fe-based nanocrystals.

11. The soft magnetic alloy as set forth in claim 10 , wherein the Fe-based nanocrystals have an average grain size of 5 to 30 nm.

12. The soft magnetic alloy as set forth in claim 1 , wherein said soft magnetic alloy is formed in a ribbon form.

13. The soft magnetic alloy as set forth in claim 1 , wherein said soft magnetic alloy is formed in a powder form.

14. A magnetic device comprising the soft magnetic alloy as set forth in claim 1 .

Assignees

• Tdk Corp

Inventors

• Harada Akihiro
• Matsumoto Hiroyuki
• Horino Kenji
• Yoshidome Kazuhiro
• Hasegawa Akito
• Amano Hajime
• Ara Kensuke
• Tokoro Seigo
• Otsuka Shota

Classifications

• C22C38/007

  containing silver · CPC title

• C22C33/003

  making amorphous alloys · CPC title

• C22C38/004

  Very low carbon steels, i.e. having a carbon content of less than 0,01% · CPC title

• H01F1/15333

  containing nanocrystallites, e.g. obtained by annealing · CPC title

• C22C38/008

  containing tin · CPC title