Ferrum-silicon-boron amorphous soft magnetic alloy modified by rare earth elements

Abstract

The invention relates to an amorphous soft magnetic alloy material, in particular to a ferrum-silicon-boron amorphous soft magnetic alloy modified by rare earth elements. Ingredients of the alloy comprise ferrum base or cobalt base or nickel base ferromagnetic materials, vitrified element silicon and boron and a mixture of trace rare earth elements of lanthanum, praseodymium and cerium. The ingredients respectively have the following contents that the ferromagnetic materials account for 76 to 77 percent of the total weight of the alloy, the vitrified element silicon accounts for 79 percent of the total weight of the alloy, the vitrified element boron accounts for 14 to 16 percent of the total weight of the alloy, the mixture of the trace rare earth elements accounts for 0.1 to 10.3 percent of the total weight of the alloy, and in the mixture of the trace rare earth elements, the atomic ratio of lanthanum to praseodymium to cerium is 1 / 1 / 1. The alloy of the invention adds multivariant rare earth elements in the ingredients, effectively improves the magnetic performance and the mechanical property, and has the advantages of high magnetic conductivity, high saturation magnetic flux, low coercive force, low ferrum loss, good dispersion feature and the like.

Description

technical field [0001] The invention relates to an amorphous soft magnetic alloy material, in particular to an iron silicon boron soft magnetic amorphous wire material modified by rare earth elements. Background technique [0002] Amorphous alloy material (also known as metallic glass) is an alloy without crystal atomic structure. The so-called amorphous means that the liquid metal has no time to crystallize during the rapid cooling and solidification process, and its atomic arrangement still maintains the long-range disordered state of the liquid metal. Because there are no crystal grains and grain boundaries in the alloy, it is easy to magnetize. Therefore, the comprehensive soft magnetic properties of amorphous alloys are obviously better than crystalline soft magnetic materials. Amorphous soft magnetic alloy material is a new type of alloy material that came out in the 1970s. In 1967, Professor Duwez took the lead in developing Fe-P-C series amorphous soft magnetic allo...

AI Technical Summary

Problems solved by technology

However, for general iron-based amorphous materials, its saturation magnetic induction is not too high, and there is still a tendency to crystallize, resulting in poor temperature stability, which cannot fully satisfy high saturation magnetic induction and high temperature stability. Demand for high-quality soft magnetic materials

On the other hand, this kind of amorphous alloy produced by the commonly used rapid cooling method has a large internal stress and weak stability. It must go through a certain heat treatment process and use the method of amorphous crystallization to improve its high frequency magnetic properties. can

In many occasions, iron-based amorphous alloys can only obtain excellent soft magnetic properties after annealing, but the material itself has a tendency to become brittle almost universally after annealing

The main reason is the reduction of free volume energy, segregation of elements, phase separation and crystallization due to structural relaxation. During the crystallization process of materials at different temperatures, it is often accompanied by the growth of grain size, the decrease of material plasticity and the Increased brittleness limits the large-scale application of Fe-based amorphous wires and severely restricts the development of amorphous soft magnetic alloy materials

[0005] So far, there are no literature reports on the modification of iron-silicon-boron alloys with rare earth elements (La, Pr, Ce)