Preparation method of Fe66Co10Mo4P4C4B4Si3 block soft-magnetic nanocrystalline/amorphous composite material

Abstract

The invention relates to a preparation method of a Fe66Co10Mo4P4C4B4Si3 block soft-magnetic nanocrystalline/amorphous composite material, comprising the following steps: annealing a Fe66Co10Mo4P4C4B4Si3 block amorphous alloy in vacuum at a first crystallization peak temperature Tp and preserving heat for a specific time, after annealing, putting the annealed alloy in a cooling medium to fast coolto room temperature. According to the invention, nanocrystallization of the Fe base block amorphous alloy can be realized, and the soft magnetic property can be improved obviously. The method provides a novel technological process of the Fe66Co10Mo4P4C4B4Si3 block soft-magnetic nanocrystalline/amorphous composite material.

Description

technical field [0001] The invention specifically relates to the field of metallurgy, in particular to a Fe 66 co 10 Mo 4 P 4 C 4 B 4 Si 3 Preparation method of bulk soft magnetic nanocrystalline / amorphous composite gold. The obtained Fe-based bulk soft magnetic nanocrystalline / amorphous composite material has more excellent soft magnetic properties than its corresponding Fe-based bulk amorphous alloy. Background technique [0002] Fe-based nanocrystalline / amorphous composite materials have the advantages of high magnetic saturation strength, low coercive force, high magnetic permeability and low hysteresis loss, and have more excellent softness than permalloy, silicon steel sheet and amorphous alloy. Magnetic properties have broad application prospects in the field of power electronics industry. [0003] In the late 1980s, Yoshizawa et al. found that adding an appropriate amount of Cu to the Fe-Si-B alloy, and after an appropriate crystallization annealing process, ...

AI Technical Summary

Problems solved by technology

The main alloy systems of the existing amorphous nanocrystalline soft magnetic materials are Fe-Si-Nb-B-Cu system, Fe-Zr-B-Cu system and Fe-Co-Nb-B-Cu system, etc., due to the The enrichment effect will become the core of crystallization nucleation during the rapid solidification process, thus reducing the amorphous formation ability of these alloy systems, making it difficult to prepare larger bulk amorphous alloys, and only thin strips can be prepared sample

There are three main disadvantages when thin strip material is used as a magnetic material: the strip is too thin to increase the number of winding layers of the iron core, and there is a large amount of air between the layers, which leads to a decrease in the density of the iron core, which will inevitably lead to a decrease in the magnetic flux density : There are annealing brittleness and stress sensitivity at the same time, which leads to difficulties in the preparation of iron cores, thus limiting the application of nanocrystalline soft magnetic materials

[0006] Ultrasonic method can realize the nanocrystallization method of bulk amorphous alloy. Under ultrasonic conditions, the bulk amorphous alloy is heated to achieve nanocrystallization. Although the nanocrystallization of bulk amorphous alloy can be realized, the equipment used Complex and long processing time (30-90min), which increases the processing cost, and the processed bulk amorphous alloy does not have soft magnetic properties

[0007] Fe 74 Al 4 Ga 2 P 12 B 4 Si 4 The nanocrystallization method of the bulk amorphous alloy improves the soft magnetic properties. Although the nanometer-sized α-Fe phase is obtained through the crystallization annealing treatment, the Fe 74 Al 4 Ga 2 P 12 B 4 Si 4 The bulk amorphous alloy is not a soft magnetic material in nature, and the coercive force is reduced to 94.16Oe=7496A / m after nanocrystallization treatment

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