Low-cost high-conductivity magnet based amorphous nanocrystalline magnetically soft alloy and preparation method thereof

Abstract

The invention discloses low-cost high-conductivity magnet based amorphous nanocrystalline magnetically soft alloy and a preparation method thereof. The molecular formula of the magnetically soft alloy is FeaSibBcMdCueNbfM'g, wherein M is Al or Zn, and M' is selected from one or more of Y, Gd or Er; and a, b, c, d, e, f and g are the mass percent, the value ranges meet the conditions that a is larger than or equal to 79 and less than or equal to 88.5, b is larger than or equal to 8 and less than or equal to 11, c is larger than or equal to 0.05 and less than or equal to 2, d is larger than or equal to 0.8 and less than or equal to 1.5, e is larger than or equal to 0.7 and less than or equal to 2.5, f is larger than or equal to 2 and less than or equal to 4, and g is larger than or equal to 0.008 and less than or equal to 0.02. On the basis that the high magnetic conductivity, high Bs and low coercive force and consumption of the magnetically soft alloy are all achieved, the low-cost Al or the Zn is adopted to replace copper partially, the content of Nb is decreased, and trace rare-earth metal is mixed, so that the production cost is reduced. The low-cost high-conductivity magnet based amorphous nanocrystalline magnetically soft alloy is obtained through the preparation method which is simple in process and disclosed by the invention.

Description

technical field [0001] The invention belongs to the technical field of soft magnetic alloy materials, and in particular relates to a low-cost high-permeability amorphous nanocrystalline soft magnetic alloy and a preparation method thereof. Background technique [0002] Soft magnetic material is a commonly used functional material, which has been widely used in industrial fields such as electric power, motor and electronics. Since the 19th century, soft magnetic alloys have been greatly developed, and successively produced electrical pure iron, silicon steel, permalloy, iron-aluminum alloy, iron-silicon aluminum alloy, iron-cobalt alloy, soft magnetic ferrite and Fe-based amorphous nanocrystalline A series of soft magnetic alloys such as soft magnetic alloys. [0003] Iron-based amorphous nanocrystalline soft magnetic alloy has high resistance, high magnetic permeability, low iron loss and high saturation magnetic flux density. Since the discovery of Finemet soft magnetic al...

AI Technical Summary

Problems solved by technology

However, the price of Nb is relatively expensive, and there is a problem of high raw material cost, which is not conducive to industrial production

CN103924169A reported reducing the content of Nb on the basis of Fe-Si-B-P-Cu-Nb alloy and modifying it by doping a small amount of rare earth yttrium to reduce production costs. At the same time, nanocrystalline alloy products have excellent magnetic permeability and low coercivity force, but its saturation magnetic induction intensity Bs (when H=5A / m) is only greater than about 1.0T, which still needs to be further improved