| 摘要 |
[Object] To provide an Fe-based amorphous alloy having a glass transition temperature (Tg) and capable of exhibiting a high saturation magnetic flux density Bs, and a dust core made using a powder of the Fe-based amorphous alloy. [Solution] The compositional formula of an Fe-based amorphous alloy of the present invention is (Fe 100-a-b-c-de Cr a P b C c B d Si e (a, b, c, d, and e are in terms of at%), where 0 at % ‰¤ a ‰¤ 1.9 at%, 1.7 at % ‰¤ b ‰¤ 8.0 at %, 0 at% ‰¤ e ‰¤ 1.0 at %, an Fe content (100-a-b-c-d-e) is 77 at % or more, 19 at % ‰¤ b + c + d + e ‰¤ 21.1 at%, 0.08 ‰¤ b/(b + c + d) ‰¤ 0.43, 0.06 ‰¤ c/(c + d) ‰¤ 0.87, and the Fe-based amorphous alloy has a glass transition temperature (Tg). |
