High-performance ferric-based nano-crystalline soft magnetic alloy and preparation method thereof

Abstract

The invention provides a high-performance ferric-based nano-crystalline soft magnetic alloy and a preparation method thereof, and belongs to the field of preparation of soft magnetic alloy of functional materials. Chemical elements of the nano-crystalline soft magnetic alloy can be represented by FeaPbCcSidAleCrfCug, wherein a, b, c, d, e and f are the atomic percentage of corresponding elements, which are in a range as follows: b is 4-10, c is 5-9, c is 0-6, e is 0.5-1, f is 0.3-0.5, g is 0-2, and a is (100-b-c-d-e-f-g). A soft magnetic amorphous alloy ribbon made by a rotary quenching method according to an ingredient proportion requirement of the invention is provided with good amorphous forming ability and annealing process performance, and particularly can keep a rather low coercive force within a rather wide annealing temperature range. And the nano-crystalline soft magnetic alloy provided by the invention has a great potential application prospect because of relatively low cost and excellent soft magnetic performance.

Description

technical field [0001] The invention belongs to the technical field of soft magnetic alloys in functional materials, and in particular relates to an iron-based nanocrystalline soft magnetic alloy with excellent soft magnetic properties and a wide annealing temperature range and a preparation method thereof. Background technique [0002] In 1988, Yoshizawa developed FINEMET iron-based nanocrystalline soft magnetic alloy, which opened a new page in the development history of soft magnetic alloys. Academic and industrial circles have carried out extensive and in-depth research on this new type of alloy with excellent soft magnetic properties. The excellent soft magnetic properties of iron-based nanocrystalline soft magnetic alloys are attributed to the fact that the amorphous matrix and the uniform distribution of nanocrystalline grains on the matrix A special two-phase composite structure, the nano-grains effectively reduce the magnetocrystalline anisotropy of the alloy throug...

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Problems solved by technology

[0004] However, the current mainstream iron-based soft tape material such as (1K107) has a high annealing temperature (535°C) and a long holding time (1h). If C is used instead of B, NbC and Fe will be formed during annealing. 3 C, opposite diffuse distribution of NbC and Fe 3 The precipitation of C phase will pin the magnetic domains and deteriorate its soft magnetic properties

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