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A kind of iron-based nanocrystalline soft magnetic alloy and preparation method thereof

A technology of iron-based nanocrystals and soft magnetic alloys, applied to magnetic objects, magnetic materials, electrical components, etc., to achieve the effects of small magnetic crystal anisotropy, high magnetic permeability, and improved high-frequency magnetic properties

Active Publication Date: 2020-11-03
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above-mentioned patented ingredients and preparation methods still cannot simultaneously have comprehensive performances such as low cost, high thermal stability (high process window), high magnetic permeability and high corrosion resistance, so it is difficult to prepare a large-scale solution that can solve complex and harsh environments. Electromagnetic Compatibility Problems of Nanocrystalline Soft Magnetic Materials

Method used

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  • A kind of iron-based nanocrystalline soft magnetic alloy and preparation method thereof
  • A kind of iron-based nanocrystalline soft magnetic alloy and preparation method thereof
  • A kind of iron-based nanocrystalline soft magnetic alloy and preparation method thereof

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Effect test

Embodiment 1

[0063] In the present embodiment, the molecule of iron-based nanocrystalline soft magnetic alloy material is Fe 69.8 Si 12 B 8 Nb 2.6 Cu 0.6 P 1 al 6 .

[0064] The concrete preparation method of this iron-based nanocrystalline alloy is as follows:

[0065] (1) Fe, Si, FeB, FeP, FeNb, Cu and Al of industrial purity are used as raw materials according to Fe 69.8 Si 12 B 8 Nb 2.6 Cu 0.6 P 1 al 6 A quenched amorphous strip with a width of about 1 mm and a thickness of about 23 μm was prepared by batching, master alloy smelting, and single-roll quenching technology, and the copper roll speed was 30 m / s.

[0066] (2) NETZSCH DSC404C differential scanning calorimeter (DSC) was used to measure the crystallization temperature of the alloy strip at a heating rate of 0.67K / s.

[0067] Such as figure 1 As shown, the temperature at which α-Fe nanocrystals start to precipitate is the temperature at which the first crystallization peak begins to crystallize (T x1 ) is 768K, ...

Embodiment 2

[0076] In the present embodiment, the molecule of iron-based nanocrystalline soft magnetic alloy material is Fe 71.8 Si 12 B 8 Nb 2.6 Cu 0.6 P 1 al 4 .

[0077] The concrete preparation method of this iron-based nanocrystalline alloy is as follows:

[0078] (1) Fe, Si, FeB, FeP, FeNb, Cu and Al of industrial purity are used as raw materials according to Fe 71.8 Si 12 B 8 Nb 2.6 Cu 0.6 P 1 al 4 A quenched amorphous strip with a width of about 1 mm and a thickness of about 23 μm was prepared by batching, master alloy smelting, and single-roll quenching technology, and the copper roll speed was 30 m / s.

[0079] (2) The crystallization temperature of the quenched amorphous strip was measured by DSC at a heating rate of 0.67K / s. Such as figure 1 As shown, the T of the quenched amorphous strip x1 770K, T x2 is 966K, and the heat treatment temperature window ΔT is 196K.

[0080] (3) to Fe 71.8 Si 12 B 8 Nb 2.6 Cu 0.6 P 1 al 4 The alloy is heat treated for nanoc...

Embodiment 3

[0089] In the present embodiment, the molecule of iron-based nanocrystalline soft magnetic alloy material is Fe 73.8 Si 12 B 8 Nb 2.6 Cu 0.6 P 1 al 2 .

[0090] The concrete preparation method of this iron-based nanocrystalline alloy is as follows:

[0091] (1) Fe, Si, FeB, FeP, FeNb, Cu and Al of industrial purity are used as raw materials according to Fe 73.8 Si 12 B 8 Nb 2.6 Cu 0.6 P 1 al 2 A quenched amorphous strip with a width of about 1 mm and a thickness of about 23 μm was prepared by batching, master alloy smelting, and single-roll quenching technology, and the copper roll speed was 30 m / s.

[0092] (2) The crystallization temperature of the rapidly quenched amorphous strip was measured by DSC at a heating rate of 0.67K / s. Such as figure 1 As shown, the T of the rapidly quenched amorphous strip x1 for 771K, T x2 is 957K, so the heat treatment temperature window ΔT is 186K.

[0093] (3) to Fe 73.8 Si 12 B 8 Nb 2.6 Cu 0.6 P 1 al 2 The alloy is h...

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Abstract

The invention discloses an iron-based nanocrystalline soft magnetic alloy, the molecular formula of which is Fe a Si b B c m d Cu e P f Al g , M is the metal element Nb, Mo, V, Mn or Cr, where a, b, c, d, e, f, g are the mole percentages of the corresponding atoms, and 6≤b≤15, 5≤c≤12 , 0.5≤d≤3, 0.5≤e≤1.5, 0.5≤f≤3, 0.5≤g≤10, the balance is iron and unavoidable trace impurity elements, the structure of the iron-based nanocrystalline soft magnetic alloy is: A dual-phase alloy in which mixed nanocrystalline grains of Fe and Fe(Si,Al) with a body-centered cubic structure are embedded in an amorphous matrix, with an average size of 10-13nm. The present invention also provides a preparation method of the above-mentioned iron-based nanocrystalline soft magnetic alloy, which includes two-step heating and two-step cooling heat treatment. The iron-based nanocrystalline soft magnetic alloy provided by the invention has both low cost, excellent soft magnetic properties, high corrosion resistance, good production processability and heat treatment processing performance, and has the advantages of noise suppression, filtering, Wireless charging and other fields have broad application prospects.

Description

technical field [0001] The invention relates to the technical field of iron-based nanocrystalline soft magnetic alloy materials, in particular to an iron-based nanocrystalline soft magnetic alloy with low coercive force, high magnetic permeability, high thermal stability and high corrosion resistance and a preparation method thereof . Background technique [0002] With the rapid development of technologies such as 5G communication and wireless charging, problems such as electromagnetic interference and health hazards caused by electromagnetic wave radiation are becoming more and more serious. Soft magnetic materials are commonly used materials to suppress magnetic field interference. Due to the small skin effect and low wave impedance of low-frequency electromagnetic waves (frequency below 300kHz), the absorption and reflection loss of materials for low-frequency magnetic field radiation becomes very small, so the problem of low-frequency magnetic shielding has always been ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C45/02C22C33/04C22C38/00C22C38/02C22C38/06C22C38/16H01F1/147H01F1/153
CPCC22C33/003C22C33/04C22C38/002C22C38/02C22C38/06C22C38/16C22C45/02H01F1/14791H01F1/15308H01F1/15333H01F1/15341
Inventor 黎嘉威刘延新吴佳欣贺爱娜董亚强
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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