Toughness-enhanced iron-based bulk amorphous soft magnetic alloy and preparation method thereof

Abstract

The invention relates to toughness-enhanced iron-based bulk amorphous soft magnetic alloy and a preparation method thereof, belonging to the field of a magnetic functional material. The expression formula of the alloy is Fe<x>SiBP<c>C<d>Mo<e>M<f>, wherein M is at least one of Cu, Ag and Au, x, a, b, c, d, e and f respectively represent atomic percent content of each corresponding constituent, a is more than or equal to 0.5 but less than or equal to 14, b is more than or equal to 0.5 but less than or equal to 15, c is more than or equal to 0.5 but less than or equal to 14, d is more than or equal to 0.1 but less than or equal to 5, e is more than or equal to 0.1 but less than or equal to 5, f is more than or equal to 0.2 but less than or equal to 1, x is more than or equal to 72 but less than or equal to 85, and (x+a+b+c+d+e+f) is equal to 100%. With the preparation method provided by the invention, the saturation magnetic induction and the plastic deformation capability of iron-based bulk amorphous can be simultaneously improved; moreover, the production process is simple, is low in cost and is easy for industrialization; and the product has excellent soft magnetic performance and toughness, and can be taken as a structure and a functional soft magnetic material applied to the fields of power, electrons, information, communication and the like.

Description

technical field [0001] The invention relates to an iron-based bulk amorphous soft magnetic alloy with enhanced toughness and a preparation method thereof, belonging to the field of magnetic functional materials. Background technique [0002] The ferromagnetic bulk amorphous alloy has a uniform structure, no grain boundaries and magnetic crystal anisotropy, no precipitated phases and impurities, little pinning effect on the motion of magnetic domain walls, and high resistivity, so it has low loss, high magnetic Conductivity and high saturation magnetization and other advantages, while Fe-based amorphous raw materials are abundant, the preparation process is short, and the product is energy-saving and environmentally friendly, making some Fe-based amorphous alloy strips widely used in power conversion (such as transformers) and other fields. With the rapid development of science and technology, the preparation of electromagnetic components is required to be simplified and mini...

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Problems solved by technology

[0006] In summary, in order to obtain Fe-based amorphous alloys with strong amorphous forming ability, it is usually necessary to add a large amount of non-ferromagnetic elements to the alloy. However, the addition of non-magnetic elements will greatly reduce its saturation magnetization or deteriorate other soft magnetic properties. energy, while increasing the cost of raw materials

The unique disordered atomic structure of the amorphous alloy itself lacks crystal defects such as dislocations and twins inside the alloy. Usually, at room temperature or below room temperature, it cannot undergo continuous plastic deformation like crystalline materials. The deformation is only Occurs in highly localized shear bands, resulting in brittle fracture, which severely restricts the industrial application of bulk amorphous alloys

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