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Method for preparing iron-bast non-crystalline nanometer crystal magnetically soft alloy by laser surface crystallization

A nanocrystalline soft magnetic and iron-based amorphous technology, applied in the field of nanomaterials, can solve the problems of large particle size, harmful magnetism, complex process, etc., and achieve the effects of low crystallization brittleness, increased surface hardness, and improved comprehensive magnetic properties

Inactive Publication Date: 2005-07-27
NORTHEASTERN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the annealing process also has some disadvantages: the process is relatively complicated, the range of annealing treatment is not selective, and the entire material must be annealed, which leads to the difficulty of solving the brittleness of the iron-based nanocrystalline alloy, which seriously affects the application of the material; at the same time, the annealing crystallization The particle size of the precipitated phase is large, and in addition to the formation of α-Fe(Si) crystal phase, there is also the formation of Fe-B phase which is harmful to magnetic properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0008] Example 1. Using 2KW CO 2 Laser, remove the laser focusing mirror. Amorphous band Fe 73.5 Cu 1 Nb 3 Si 13.5 B 9 The alloy has a width of 20 mm, a thickness of 30 μm, and a length of 1000 mm. Place the amorphous strip on the sample stage of the laser to ensure that the amorphous strip is in close contact with the support (copper plate with good thermal conductivity) on the sample stage. Adjust the astigmatism spot of the laser beam to 20mm, select the laser power as 80, 100, 120, 140, and 160W respectively, and treat 5 amorphous strips of Fe at a speed of 10mm / s 73.5 Cu 1 Nb 3 Si 13.5 B 9 After irradiation treatment, about 2.2%, 2.3%, 2.7%, 3.1%, and 3.4% of α-Fe (Si) crystallization phases (internal magnetic field is about 139KOe) were produced on the surface of the amorphous belt, forming a small amount of single phase α-Fe(Si) crystallized phase plus amorphous dual-phase structure material, the material has good toughness, the number of crystallized phases ...

example 2

[0009] Example 2. Using 2KW CO 2 Laser, remove the laser focusing mirror. Amorphous band Fe 73.5 Cu 1 Nb 3 Si 13.5 B 9 The alloy has a width of 20 mm, a thickness of 30 μm, and a length of 500 mm. Place the amorphous strip on the sample stage of the laser to ensure that the amorphous strip is in close contact with the support (copper plate with good thermal conductivity) on the sample stage and the free surface is facing upward. Adjust the astigmatism spot of the laser beam to 20mm, and the laser power to 200W, and respectively treat the amorphous band Fe at a speed of 20mm / s 73.5 Cu 1 Nb 3 Si 13.5 B 9 After two times of irradiation treatment, three kinds of hyperfine structures (internal magnetic fields are 154 (4%), 243 (3%), 312KOe (8%)) were produced on the surface of the amorphous strip, the total amount is about 15%, and the size is 15-20nm α-Fe(Si) crystallization phase plus remaining amorphous dual-phase structure material. Its coercive force Hc=1.5(A / M), s...

example 3

[0010] Example 3. Using 2KW CO 2 Laser, remove the laser focusing mirror. Amorphous band Fe 73.5 Cu 1 Nb 3 Si 13.5 B 9 The alloy has a width of 20 mm, a thickness of 30 μm, and a length of 500 mm. Place the amorphous strip on the sample stage of the laser to ensure that the amorphous strip is in close contact with the support (copper plate with good thermal conductivity) on the sample stage and the free surface is facing upward. Adjust the astigmatism spot of the laser beam to 20mm, the laser power to 300W, and the amorphous band Fe at a speed of 20mm / s 73.5 Cu 1 Nb 3 Si 13.5 B 9 After two times of irradiation treatment, four kinds of hyperfine structures (internal magnetic fields are 116 (7%), 126 (2%), 228 (3%), 313 Koe (10%)) were produced on the surface of the amorphous strip, the total About 22% α-Fe(Si) crystalline phase with a size of 15-30nm plus the remaining amorphous dual-phase structure material. Its coercive force Hc=1.3 (A / M), saturation magnetic indu...

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PUM

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Abstract

A process to make the iron-base amorphous nano-crystal magnetically soft alloy has been provided in the invention. The fature of it is produce the quantitative alpha-Fe(Si) nano-phase in the 0.1-10 um the surface of the alloy for the type of FeCuMSiB and FeMB by inducing of the CO2 laser and NDYAG-pulsed laser. The process has the feature of fast, controllable, environment protection, and low cost. It can work under the normal temperature and pressure. The crystal phase which is 0.1-10 um has the composition of nano-phase and amorphous phase and the nano-crystal is 1-30 nm. All in all, it can improve the feature of surface hardness of the material, crystal brittlement and complex magnetism.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, in particular to a method for preparing iron-based amorphous nanocrystalline soft magnetic alloy by laser surface crystallization. Background technique [0002] Iron-based nanocrystalline soft magnetic alloys mainly include FeCuMSiB type and FeMB type. Iron-based nanocrystalline alloys have high saturation magnetic induction, high magnetic permeability, low coercive force, low high-frequency loss, and good hardness. , wear resistance and corrosion resistance, good temperature and environmental stability and other characteristics. Its comprehensive magnetic properties are far superior to those of silicon steel, ferrite, permalloy and amorphous alloys. It can be used as transformers, transformers, inductors, sensor cores and magnetic shielding materials, etc., and has broad application prospects in the field of power electronics industry. [0003] Iron-based nanocrystalline alloys are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/09
Inventor 陈岁元刘常升张滨崔彤马利霞才庆魁
Owner NORTHEASTERN UNIV
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