Nitrogen-containing iron-based amorphous nanocrystalline soft magnetic alloy and preparation method thereof

Abstract

The invention discloses a preparation method of a nitrogen-containing iron-based amorphous nanocrystalline soft magnetic alloy. The preparation method comprises the following steps that an iron-basedamorphous soft magnetic alloy is subjected to plasma nitriding to obtain a nitrogen-containing iron-based amorphous soft magnetic alloy with a completely amorphous structure, and annealing treatment is carried out to obtain the nitrogen-containing iron-based amorphous nanocrystalline soft magnetic alloy, wherein the temperature for plasma nitriding is 100-400 DEG C, and the nitriding time is 10-60min. The preparation method has the characteristics of being low in nitriding temperature and short in nitriding time, the problem of iron-based amorphous crystallization in the nitriding process issolved, and the problems that the iron-based amorphous soft magnetic alloy is poor in toughness and uneasy to machine after nitriding are solved. The invention further discloses the nitrogen-containing iron-based amorphous soft magnetic alloy and the nitrogen-containing iron-based amorphous nanocrystalline soft magnetic alloy which are prepared by using the preparation method. The crystal grain size of nanocrystalline is 10-15 nm, and the saturation magnetic induction intensity is 1.48-1.74 T.

Description

technical field [0001] The invention relates to the field of magnetoelectric functional materials, in particular to a nitrogen-containing iron-based amorphous nanocrystalline soft magnetic alloy and a preparation method thereof. Background technique [0002] Amorphous nanocrystalline soft magnetic materials have many excellent properties, such as high saturation magnetic induction, low coercive force, high magnetic permeability and low high frequency loss. Among them, the iron-based amorphous nanocrystalline soft magnetic alloy is obtained by annealing above the crystallization temperature of the iron-based amorphous substrate, in which nanometer-sized body-centered cubic iron (bcc-Fe) grains are scattered on the substrate. [0003] The use of amorphous and nanocrystalline soft magnetic alloy materials as magnetic devices can effectively promote their "miniaturization", "lightweight" and "high efficiency". Compared with traditional soft magnetic materials, they have obvious ...

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Problems solved by technology

[0009] Aiming at the deficiencies in this field, the present invention provides a method for preparing a nitrogen-containing iron-based amorphous nanocrystalline soft magnetic alloy, which promotes the rapid nitriding reaction, avoids long-term high-temperature treatment, and has the advantages of nitriding The characteristics of low temperature and short nitriding time can be used for large-area continuous nitriding treatment, which overcomes the problem of iron-based amorphous crystallization in the nitriding process, and solves the problem of poor toughness and difficult processing of iron-based amorphous soft magnetic alloys after nitriding It has the advantages of simple and efficient, low cost, controllable product quality and suitable for large-scale production.

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