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A CO-based bulk amorphous alloy with soft magnetic properties

A non-crystalline alloy, high-performance technology, applied in the direction of magnetic objects, magnetic materials, manufacturing tools, etc., to achieve the effect of high magnetic permeability, low Hc, and high strength

Active Publication Date: 2022-03-15
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] For existing Co-based amorphous soft magnetic alloys that do not have both high glass-forming ability and high B s technical problem, the present invention provides a high B s Co-based Co-rare earth (RE)-B bulk amorphous alloy with strong glass forming ability, the amorphous alloy can be prepared by copper mold casting method to obtain bulk amorphous alloy rods with a diameter of 1-3mm, and With a wide subcooled liquid phase interval (ΔT x ) and good soft magnetic properties and mechanical properties, its ΔT x 21~62℃, B s 0.51~1.24T, H c 1~8A / m, the effective permeability at 1kHz is 11300~18800, and the saturation magnetostriction coefficient is (-0.4~5.9)×10 -6 , the breaking strength is 3200~4200MPa

Method used

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  • A CO-based bulk amorphous alloy with soft magnetic properties
  • A CO-based bulk amorphous alloy with soft magnetic properties
  • A CO-based bulk amorphous alloy with soft magnetic properties

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Example 1: Co 72 Er 3 B 25

[0047] Step 1: Ingredients

[0048] Select Co, Er, B and other raw materials with a purity higher than 99% for weighing and batching according to the alloy composition ratio.

[0049] Step 2: Prepare master alloy ingot

[0050] Put the mixed raw material weighed in step 1 into a water-cooled copper crucible of a non-consumable vacuum electric arc furnace, and melt it under an argon or nitrogen atmosphere to obtain a master alloy ingot. The alloy is repeatedly smelted 4 times to ensure uniform composition;

[0051] Step 3: Preparation of Amorphous Strips

[0052] The master alloy ingot was crushed and loaded into a quartz tube, and the quenched strip sample was prepared by the single-roll strip stripping method. That is, the master alloy ingot is first heated to a molten state by induction melting in an argon or nitrogen atmosphere, and then the alloy melt is sprayed into a high-speed rotating copper roller with a high-pressure gas. The...

Embodiment 2

[0059] Example 2: Co 69 Dy 3.5 B 27.5

[0060] Step 1: Select Co, Dy, B and other raw materials with a purity higher than 99% to weigh the ingredients according to the alloy composition ratio.

[0061] Steps 2, 3, 4, and 5 are the same as in Example 1, and an amorphous rod with a diameter of 1 mm is finally obtained. Its performance data are listed in Table 1.

Embodiment 3

[0062] Example 3: Co 68 Ho 2 B 30

[0063] Step 1: Select Co, Ho, B and other raw materials with a purity higher than 99% to weigh and mix according to the alloy composition ratio.

[0064] Steps 2, 3, 4, and 5 are the same as in Example 1, and an amorphous rod with a diameter of 1.5 mm is finally obtained. Its performance data are listed in Table 1.

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Abstract

The invention provides a Co-based bulk amorphous alloy with soft magnetic properties, the alloy composition includes Co, B, RE, Fe, Ni and C; the alloy composition formula is Co a Fe b Ni c RE d B e C f , wherein, RE is at least one of La, Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm and Y; a, b, c, d, e and f are the constituent elements Atomic percentage content, satisfying: 40≤a≤76, 0≤b≤35, 0≤c≤5, b+c≤35, 2≤d≤4, 18≤e≤30, 0≤f≤5, 22 ≤d+e+f≤32, a+b+c+d+e+f=100.

Description

technical field [0001] The present invention relates to the technical field of new materials, in particular, to a Co-based bulk non-metallic material with strong glass forming ability, high saturation magnetic induction and magnetic permeability, low coercive force, low magnetostriction coefficient and high strength. crystal alloy. Background technique [0002] Due to their unique atomic arrangement structure, amorphous alloys (metallic glasses) have functional properties unmatched by ordinary crystalline metal materials, such as high strength, high specific strength, large elastic strain limit, high corrosion resistance, and precision casting In particular, Fe and Co-based amorphous alloys also have excellent soft magnetic properties, and their applications in energy, environment, power electronics, biomedical, precision machinery and other fields are increasing. [0003] However, due to the influence of the glass-forming ability of the alloy, the preparation of such mater...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C45/04B22D11/06B22C9/06H01F1/153
CPCC22C45/04B22D11/0611B22C9/061H01F1/15325
Inventor 张伟李艳辉暴丰
Owner DALIAN UNIV OF TECH
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