Nano-crystalline soft magnetic material high in saturation magnetization intensity and preparation method of nano-crystalline soft magnetic material

A technology of nanocrystalline soft magnetism and magnetization, which is applied in the direction of magnetic materials, magnetic objects, electrical components, etc., and can solve problems such as improving the soft magnetic properties of Fe-B-based nanocrystalline alloys and reducing the saturation magnetization of materials

Inactive Publication Date: 2013-08-28
NANCHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The addition of these elements will necessarily reduce the saturation magnetization of the material
Moreover, the precipitation of iron-boron phase and the growth of α-Fe nanoparticles during the crystallization process of Fe-B-based amorphous alloys make it difficult to improve Fe-B-based nanocrystalline alloys by conventional annealing processes. soft magnetic properties, etc.

Method used

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  • Nano-crystalline soft magnetic material high in saturation magnetization intensity and preparation method of nano-crystalline soft magnetic material

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Experimental program
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Effect test

Embodiment 1

[0014] Weigh 602g of pure iron powder, 17.8g of boron powder, and 8g of copper powder, and prepare Fe by vacuum smelting. 86 B 13 Cu 1 Alloy ingots, and then prepared by single-roll rapid quenching Fe 86 B 13 Cu 1 The amorphous strips are 20 μm thick and 10 mm wide, and are annealed under normal pressure at a temperature of 410° C. for 1 h. Get Fe 86 B 13 Cu 1 The precipitated phase composition of nanocrystalline soft magnetic materials is α -Fe+ a small amount of Fe 3 B (see attached picture), where α - the grain size of the Fe nanoparticles, α -Volume fraction of Fe, Fe 86 B 13 Cu 1 The resistivity, saturation magnetization, coercive force, initial permeability and relaxation frequency of nanocrystalline soft magnetic materials are 22.5nm, 57.8%, 62μΩcm, 1.71T, 3489A / m, 9.8×10 3 and 4.2×10 5 Hz.

Embodiment 2

[0016] Weigh 602g of pure iron powder, 17.8g of boron powder, and 8g of copper powder, and prepare Fe by vacuum smelting. 86 B 13 Cu 1 Alloy ingots, and then prepared by single-roll rapid quenching Fe 86 B 13 Cu 1 The amorphous strip is 20 μm thick and 10 mm wide, and the amorphous Fe 86 B 13 Cu 1 The strip is annealed, the pressure of hot isostatic pressing is 50Mpa, the annealing temperature is 410°C, and the time is 1h. Get Fe 86 B 13 Cu 1 The precipitated phase composition of nanocrystalline soft magnetic materials is α -Fe+trace Fe 3 B (see attached picture), where α - the grain size of the Fe nanoparticles, α -Volume fraction of Fe, Fe 86 B 13 Cu 1 The resistivity, saturation magnetization, coercive force, initial permeability and relaxation frequency of nanocrystalline soft magnetic materials are 17.8nm, 60.2%, 68μΩcm, 1.82T, 900A / m, 1.4×10 4 and 1.9×10 5 Hz.

Embodiment 3

[0018] Weigh 602g of pure iron powder, 17.8g of boron powder, and 8g of copper powder, and prepare Fe by vacuum smelting. 86 B 13 Cu 1 Alloy ingots, and then prepared by single-roll rapid quenching Fe 86 B 13 Cu 1 The amorphous strip is 20 μm thick and 10 mm wide, and the amorphous Fe 86 B 13 Cu 1 The strip is annealed, the pressure of hot isostatic pressing is 100Mpa, the annealing temperature is 410°C, and the time is 1h. Get Fe 86 B 13 Cu 1 The precipitated phase composition of nanocrystalline soft magnetic materials is α -Fe (see attached figure), where α - the grain size of the Fe nanoparticles, α -Volume fraction of Fe, Fe 86 B 13 Cu 1 The resistivity, saturation magnetization, coercivity, initial permeability and relaxation frequency of nanocrystalline soft magnetic materials are 15.0nm, 68.9%, 164μΩcm, 1.88T, 34A / m, 7.7×10 4 and 5.6×10 4 Hz.

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Abstract

Disclosed are a nano-crystalline soft magnetic material high in saturation magnetization intensity and a preparation method of the nano-crystalline soft magnetic material. The chemical formula is Fe<86>B<13>Cu<1>. The preparation method includes steps of (1) preparing a master batch according to components of Fe<86>B<13>Cu<1> alloy, performing vacuum melting to obtain alloy ingot, and preparing Fe<86>B<13>Cu1 amorphous strips on a quick vacuum quenching furnace; and (2) annealing the Fe<86>B<13>Cu<1> amorphous strips prepared in the step (1) at the temperature of 390-468 DEG C for one hour by means of hot isostatic pressure ranging from constant pressure to 200MPa. The fe<86>B<13>Cu<1> nano-crystalline alloy has good soft magnetism and is the good-performance nano-crystalline soft magnetic material, and resistivity, saturation magnetization intensity, coercivity, initial permeability and relaxation frequency are 183 mu omega cm, 1.94T, 12A / m, 9.2X104 and 4.9X104Hz respectively.

Description

technical field [0001] The invention belongs to the field of soft magnetic materials and their preparation. Background technique [0002] Since the advent of Fe-Si-B-Cu-Nb quinary nanocrystalline soft magnetic materials, iron-based nanocrystalline soft magnetic materials have been widely studied and applied. In order to improve the soft magnetic properties of iron-based nanocrystalline soft magnetic materials, especially the saturation magnetization, domestic and foreign scholars have conducted extensive research. The iron content in Fe-Si-B-Cu-Nb is increased from 73.5% to 77at.%, and its saturation magnetization is increased from 1.3T to 1.4T. Although substituting Co for Fe can obtain a nanocrystalline soft magnetic material with a saturation magnetization of 1.8T, the addition of Co significantly increases the price of the material. Fe-Zr-B-based nanocrystalline alloys have a saturation magnetization as high as 1.6T, but their application is hindered by the easy oxidat...

Claims

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Application Information

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IPC IPC(8): H01F1/147C22C45/02
Inventor 唐建成卓海鸥叶楠
Owner NANCHANG UNIV
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