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Large-amorphous forming capacity iron-based block amorphous magnetic alloy material and preparation method thereof

A magnetic alloy and amorphous technology, which is applied in the field of iron-based bulk amorphous magnetic alloy materials with large amorphous forming ability and its preparation, can solve the problem of poor amorphous forming ability of iron-based amorphous alloys, small magnetostriction coefficient, Can not do other problems, to achieve the effect of excellent soft magnetic properties, high magnetostriction coefficient, large amorphous formation ability

Active Publication Date: 2012-05-30
NINGBO INNOVATION CENT FOR APPLIED MAGNETICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the magnetostriction coefficient (λ s ) is relatively small and can only reach 9×10 -6 ~25×10 -6
In addition, as early as 1999, Wei Zhang et al. who also worked in Inoue's laboratory developed the Fe 80-x-y co x ln y B 20 (Ln=Nd, Sm, Tb or Dy) series amorphous alloys, this series of iron-based amorphous alloys have more than 40×10 -6 High magnetostriction performance, the maximum magnetostriction coefficient can reach 58×10 -6 , but the amorphous formation ability of this series of iron-based amorphous alloys is not strong, and cannot be made into bulk amorphous alloy materials

Method used

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  • Large-amorphous forming capacity iron-based block amorphous magnetic alloy material and preparation method thereof
  • Large-amorphous forming capacity iron-based block amorphous magnetic alloy material and preparation method thereof
  • Large-amorphous forming capacity iron-based block amorphous magnetic alloy material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Prepare a diameter of 4mm (Fe 0.71 Dy 0.04 B 0.2 Si 0.05 ) 0.96 Nb 0.04Bulk amorphous magnetic alloy rods.

[0031] The specific preparation method is as follows:

[0032] Step 1: Pure metal Fe, Si, B, Nb, Dy elements with a purity of more than 99% according to the molecular formula (Fe 0.71 Dy 0.04 B 0.2 Si 0.05 ) 0.96 Nb 0.04 The atomic percentage in the preparation of raw materials;

[0033] Step 2: Put the raw materials prepared in step 1 in the water-cooled copper crucible of the electric arc melting furnace, and first evacuate to 10 -5 Pa, then fill it with argon until the pressure is 600mbar for smelting, and then continue smelting for 5 minutes after melting, then let the alloy cool with the copper crucible until it solidifies, turn it over quickly, and repeatedly smelt 3 to 5 times to obtain an alloy with uniform composition ingot;

[0034] Step 3: Grind the alloy ingot obtained in step 2 to remove surface impurities, then place it in alcohol for ...

Embodiment 2

[0041] Prepare a diameter of 3.5mm (Fe 0.7 Tb 0.05 B 0.2 Si 0.05 ) 0.96 Nb 0.04 Bulk amorphous magnetic alloy rods.

[0042] The specific preparation method is as follows:

[0043] Step 1: the pure metal Fe, Si, B, Nb, Tb elements with a purity of more than 99% according to the molecular formula (Fe 0.7 Tb 0.05 B 0.2 Si 0.05 ) 0.96 Nb 0.04 The atomic percentage in the preparation of raw materials;

[0044] Step 2: Put the raw materials prepared in step 1 in the water-cooled copper crucible of the electric arc melting furnace, and first vacuumize to 1.5×10 -5 Pa, then fill it with argon until the pressure is 500mbar for smelting, and then continue smelting for 6 minutes after melting, then let the alloy cool with the copper crucible until it solidifies, turn it over quickly, and repeatedly smelt 3 to 5 times to obtain an alloy with uniform composition ingot;

[0045] Step 3: Grind the alloy ingot obtained in step 2 to remove surface impurities, then place it in al...

Embodiment 3

[0052] Prepare a diameter of 1mm (Fe 0.74 Dy 0.01 B 0.2 Si 0.05 ) 0.96 Nb 0.04 Bulk amorphous magnetic alloy rods.

[0053] The specific preparation method is as follows:

[0054] Step 1: Pure metal Fe, Si, B, Nb, Dy elements with a purity of more than 99% according to the molecular formula (Fe 0.74 Dy 0.01 B 0.2 Si 0.05 ) 0.96 Nb 0.04 The atomic percentage in the preparation of raw materials;

[0055] Step 2: Put the raw materials prepared in step 1 in the water-cooled copper crucible of the electric arc melting furnace, and first vacuumize to 2×10 -5 Pa, then fill it with argon until the pressure is 700mbar for smelting, and then continue smelting for 8 minutes after melting, then let the alloy cool with the copper crucible until it solidifies, then turn it over quickly, and repeatedly smelt 3 to 5 times to obtain an alloy with uniform composition ingot;

[0056] Step 3: Grind the alloy ingot obtained in step 2 to remove surface impurities, then place it in alc...

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Abstract

The invention discloses a large-amorphous forming capacity iron-based block amorphous magnetic alloy material and a preparation method thereof. The molecular formula of the large-amorphous forming capacity iron-based block amorphous magnetic alloy material is (Fe0.75-aMaB0.25-bSib) 1-cNbc, wherein M is one or more elements of Dy, Tb, Sm, Er, Ga and Y, a, b and c are atom percentages, a is not less than 0.005 and not greater than 0.1, b is not less than 0.03 and not greater than 0.07, and c is not less than 0.02 and not greater than 0.06. Compared with the prior art, the alloy material in the invention has the advantages of large amorphous forming capacity, favorable magnetostrictive coefficient and excellent soft magnetic performance, the reduced glass transition temperature of the alloy material reaches 0.5-0.7, the magnetostrictive coefficient reaches -50*10<-6> to 200*10<-6>, the alloy material can be prepared into amorphous bars with the diameters of 0.5mm-6mm due to the large amorphous forming capacity, thereby the alloy material can be widely applied in the fields of transformers, magnetic sensors and the like.

Description

technical field [0001] The invention relates to the technical field of amorphous alloys, in particular to an iron-based bulk amorphous magnetic alloy material with large amorphous forming ability and a preparation method. Background technique [0002] In 1960, Duwez et al prepared the first amorphous alloy - Au-Si amorphous alloy by rapid cooling of the melt. Amorphous alloys do not have long-range atomic order. Compared with traditional crystalline alloy materials, amorphous alloys exhibit many excellent properties, such as excellent mechanical properties, strong corrosion resistance, and unique photoelectric properties, which make non-crystalline alloys Crystalline alloys show a wide range of application prospects and have become one of the hotspots in the research of new materials. [0003] Iron-based amorphous magnetic alloys show good soft magnetic properties due to their irregular arrangement of atoms, aperiodicity, and no grain boundaries. Since their appearance in 1...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C45/02C22C33/04H01F1/153B22D21/00B22D27/04
Inventor 沈宝龙黎嘉威胡明俊门贺
Owner NINGBO INNOVATION CENT FOR APPLIED MAGNETICS CO LTD
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