Amorphous alloy powder, dust core, magnetic element, and electronic device

1. An amorphous alloy powder, comprising particles of an amorphous alloy material containing Fe, Cr, Mn, Si, B, and C as constituent components, wherein in the amorphous alloy material,

Fe is contained as a main component,

the content of Cr is 1.0 at % or more and 3 at % or less,

the content of Mn is 1.3 at % or more and 2.8 at % or less,

the content of Si is 10 at % or more and 14 at % or less,

the content of B is 8 at % or more and 13 at % or less, and

the content of C is 1 at % or more and 3 at % or less.

2. The amorphous alloy powder according to claim 1 , wherein the content of Cr in the amorphous alloy material is a (at %) and the content of Mn therein is b (at %), the value of b/(a+b) is 0.2 or more and 0.72 or less.

3. The amorphous alloy powder according to claim 1 , wherein the content of Cr in the amorphous alloy material is a (at %) and the content of Mn therein is b (at %), the value of a+b is 1.5 or more and 5.5 or less.

4. The amorphous alloy powder according to claim 1 , wherein the content of Cr in the amorphous alloy material is a (at %), the content of Mn therein is b (at %), the content of Si therein is c (at %), the content of B therein is d (at %), and the content of C therein is e (at %), the value of (a+b)/(c+d+e) is 0.05 or more and 0.25 or less.

5. The amorphous alloy powder according to claim 1 , wherein the content of Mn in the amorphous alloy material is b (at %), the content of Si therein is c (at %), and the content of C therein is e (at %), the value of e/(b+c) is 0.07 or more and 0.27 or less.

6. The amorphous alloy powder according to claim 1 , wherein

the content of Cr in the amorphous alloy material is 1 at % or more and 2.5 at % or less, and

the content of Cr in the amorphous alloy material is a (at %), the content of Mn therein is b (at %), and the content of C therein is e (at %), the value of e/(a+b) is 0.2 or more and 0.95 or less.

7. The amorphous alloy powder according to claim 6 , wherein the value of a+b is 2.1 or more and 5.3 or less.

8. The amorphous alloy powder according to claim 7 , wherein the value of b/a is 0.4 or more and less than 1.

9. The amorphous alloy powder according to claim 7 , wherein the value of b/a is 1 or more and 2 or less.

10. The amorphous alloy powder according to claim 6 , wherein the content of Si in the amorphous alloy material is c (at %) and the content of B therein is d (at %), the value of b/(c+d) is 0.04 or more and 0.15 or less.

11. The amorphous alloy powder according to claim 1 , wherein

the content of Cr in the amorphous alloy material is 2 at % or more and 3 at % or less, and

the content of Cr in the amorphous alloy material is a (at %), the content of Mn therein is b (at %), and the content of C therein is e (at %), the value of e/(a+b) is 0.3 or more and 0.95 or less.

12. The amorphous alloy powder according to claim 11 , wherein the value of a+b is 2.1 or more and 3.8 or less.

13. The amorphous alloy powder according to claim 12 , wherein the value of b/a is 0.02 or more and less than 0.47.

14. The amorphous alloy powder according to claim 11 , wherein the content of Si in the amorphous alloy material is c (at %) and the content of B therein is d (at %), the value of b/(c+d) is 0.01 or more and 0.05 or less.

15. The amorphous alloy powder according to claim 1 , wherein the content of Cr in the amorphous alloy material is a (at %) and the content of Mn therein is b (at %), the value of a+b is 1.5 or more and 5.5 or less, and the value of b/a is 0.3 or more and less than 1.

16. The amorphous alloy powder according to claim 15 , wherein the value of b is 0.1 or more and 2.5 or less.

17. The amorphous alloy powder according to claim 15 , wherein the content of Si in the amorphous alloy material is c (at %) and the content of B therein is d (at %), the value of b/(c+d) is 0.01 or more and 0.12 or less.

18. The amorphous alloy powder according to claim 15 , wherein the content of Si in the amorphous alloy material is c (at %), the content of B therein is d (at %), and the content of C therein is e (at %), the value of (a+b)/(c+d+e) is 0.05 or more and 0.25 or less.

19. The amorphous alloy powder according to claim 1 , wherein the content of Cr in the amorphous alloy material is a (at %) and the content of Mn therein is b (at %), the value of a+b is 1.5 or more and 6 or less, and the value of b/a is 1 or more and 2 or less.

20. The amorphous alloy powder according to claim 19 , wherein the value of b is 0.5 or more and 3 or less.

21. The amorphous alloy powder according to claim 19 , wherein the content of Si in the amorphous alloy material is c (at %) and the content of B therein is d (at %), the value of b/(c+d) is 0.03 or more and 0.15 or less.

22. The amorphous alloy powder according to claim 19 , wherein the content of Si in the amorphous alloy material is c (at %), the content of B therein is d (at %), and the content of C therein is e (at %), the value of (a+b)/(c+d+e) is 0.05 or more and 0.25 or less.

23. The amorphous alloy powder according to claim 1 , wherein the particles have an average particle diameter of 3 μm or more and 100 μm or less.

24. The amorphous alloy powder according to claim 1 , wherein the amorphous alloy material has a coercive force of 4 Oe or less.

25. The amorphous alloy powder according to claim 1 , wherein the oxygen content in the particles is 150 ppm by mass or more and 3000 ppm by mass or less.

26. The amorphous alloy powder according to claim 1 , wherein the amorphous alloy powder is produced by a water atomization method or a high-speed spinning water atomization method.

27. A dust core, which is formed using an amorphous alloy powder composed of particles of an amorphous alloy material according to claim 1 .

28. A magnetic element, comprising the dust core according to claim 27 .

29. An electronic device, comprising the magnetic element according to claim 28 .