Soft magnetic alloy and magnetic device

Patent metadata

Field	Value
Publication number	US-11158443-B2
Application number	US-201816146268-A
Country	US
Kind code	B2
Filing date	Sep 28, 2018
Priority date	Oct 6, 2017
Publication date	Oct 26, 2021
Grant date	Oct 26, 2021

Abstract

A soft magnetic alloy contains a main component having a composition formula of (Fe(1−(α+β))X1αX2β)(1−(a+b+c+d))MaBbPcCd and auxiliary components including at least Ti, Mn and Al. In the composition formula, 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 Ag, Zn, Sn, As, Sb, Bi and a rare earth element, and M is one or more selected from the group consisting of Nb, Hf, Zr, Ta, Mo, W and V. In the composition formula, 0.030≤a≤0.100, 0.050≤b≤0.150, 0<c≤0.030, 0<d≤0.030, α≥0, β≥0, and 0≤α+β≤0.50 are satisfied. In the soft magnetic alloy, a content of Ti is 0.001 to 0.100 wt %, a content of Mn is 0.001 to 0.150 wt %, and a content of Al is 0.001 to 0.100 wt %.

First claim

The invention claimed is:

1. A soft magnetic alloy comprising a main component having a composition formula of (Fe (1−(α+β)) X1 α X2 β ) (1−(a+b+c+d)) M a B b P c C d and auxiliary components including at least Ti, Mn and Al,
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 Ag, Zn, Sn, As, Sb, Bi and a rare earth element, M is one or more selected from the group consisting of Nb, Hf, Zr, Ta, Mo, W and V,
0.030≤a≤0.100
0.050≤b≤0.150
0<c≤0.030
0<d≤0.030
α≥0
β≥0
0≤α+β≤0.50, and
a content of Ti is 0.001 to 0.100 wt %, a content of Mn is 0.001 to 0.150 wt %, and a content of Al is 0.001 to 0.100 wt % with respect to 100 wt % of the entire soft magnetic alloy.

2. The soft magnetic alloy according to claim 1 , wherein 0.730≤1−(a+b+c+d)≤0.918 is satisfied.

3. The soft magnetic alloy according to claim 1 , wherein 0≤α{1−(a+b+c+d)}≤0.40 is satisfied.

4. The soft magnetic alloy according to claim 1 , wherein α=0 is satisfied.

5. The soft magnetic alloy according to claim 1 , wherein 0≤β{1−(a+b+c+d)}≤0.030 is satisfied.

6. The soft magnetic alloy according to claim 1 , wherein β=0 is satisfied.

7. The soft magnetic alloy according to claim 1 , wherein α=β=0 is satisfied.

8. The soft magnetic alloy according to claim 1 , wherein the soft magnetic alloy comprises an amorphous phase and initial fine crystals having an average grain size in a range of 0.3 to 10 nm and has a nanohetero structure containing the initial fine crystal present in the amorphous phase.

9. The soft magnetic alloy according to claim 1 , wherein the soft magnetic alloy has a structure containing a Fe-based nanocrystal.

10. The soft magnetic alloy according to claim 9 , wherein an average grain size of the Fe-based nanocrystals is 5 to 30 nm.

11. The soft magnetic alloy according to claim 1 , wherein the soft magnetic alloy is formed in a ribbon shape.

12. The soft magnetic alloy according to claim 8 , wherein the soft magnetic alloy is formed in a ribbon shape.

13. The soft magnetic alloy according to claim 9 , wherein the soft magnetic alloy is formed in a ribbon shape.

14. The soft magnetic alloy according to claim 1 , wherein the soft magnetic alloy is formed in a powder shape.

15. The soft magnetic alloy according to claim 8 , wherein the soft magnetic alloy is formed in a powder shape.

16. The soft magnetic alloy according to claim 9 , wherein the soft magnetic alloy is formed in a powder shape.

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

18. A magnetic device comprising the soft magnetic alloy according to claim 8 .

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

20. The soft magnetic alloy according to claim 1 , wherein the content of Al is 0.005 to 0.080 wt % with respect to 100 wt % of the entire soft magnetic alloy.

Assignees

• Tdk Corp

Inventors

• Harada Akihiro
• Matsumoto Hiroyuki
• Horino Kenji
• Yoshidome Kazuhiro
• Hasegawa Akito
• Amano Hajime
• Ara Kensuke
• Tokoro Seigo
• Hosono Masakazu
• Nakano Takuma
• Mori Satoko

Classifications

• H01F1/15333

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

• H01F1/15308

  based on Fe/Ni (H01F1/15325 takes precedence) · CPC title

• C22C38/10

  containing cobalt · CPC title

• C22C38/06

  containing aluminium · CPC title

• C21D6/00

  Heat treatment of ferrous alloys · CPC title