Fe-based amorphous alloy powder and preparation process thereof

Abstract

The invention provides Fe-based amorphous alloy powder and a preparation method thereof. The specific alloy ingredient of the powder is 40-95 wt% of Fe, and alloy elements are one or combination of multiple elements, such as, P, Ni, Cr, Co, Mo, W and Re, which can be subjected to electro-deposition together with iron. The preparation process of the powder includes the steps that (1), pre-treatment of a metal substrate plated surface is performed; (2), electroplating liquor is prepared; (3), a constant-potential power source or a pulse power source can be adopted, current density of an electrode is 200-1000 mA / mm<2>, and electrolyte temperature is 30-70 DEG C; (4), a mechanical or physical method is adopted to make a plated layer fall off; (5) ball milling is performed under protection of vacuum or inert gases; (6), the amorphous alloy powder is sieved.

Description

technical field [0001] The invention relates to an amorphous alloy powder, in particular to an Fe-based amorphous alloy powder and a preparation process thereof. Background technique [0002] With the development of electronic power and communication industries, electronic components are developing in the direction of miniaturization, high frequency and high current. [0003] In addition, the requirements for the electromagnetic compatibility performance of electronic equipment are getting higher and higher. The traditional amorphous strip iron core, soft ferrite [0004] And metal magnetic powder core can not meet the demand, the application is limited. Mainly in: (1) Amorphous strip iron core works at high frequency [0005] (2) Soft ferrite has low high frequency loss, but low saturation magnetic induction and permeability, which cannot meet the development needs of miniaturization and high current; (3) The metal magnetic powder core has problems such as high high freq...

AI Technical Summary

Problems solved by technology

Since the existence of this water vapor film reduces the cooling intensity, it hinders the rapid cooling of the center part of the molten droplet.

As a result, the central part of the powder cannot obtain an amorphous structure, which affects device performance

Due to the limited cooling intensity, the aerosol method can only prepare amorphous alloy powder with strong amorphous forming ability, and the production cost is high

The advantage of the direct crushing method is that the selectivity to the material is not strong, and the material utilization rate is high, but the embrittlement annealing of the amorphous thin strip is required, and it is easy to cause uneven crystallization transformation inside the thin strip due to uneven annealing, and in the After crushing, it is easy to produce powder particles with sharp angles, which brings difficulties to the subsequent processing of powder