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A kind of rare earth-free mnalcuc permanent magnet alloy and preparation method thereof

A permanent magnet alloy, rare earth-free technology, used in the manufacture of inductors/transformers/magnets, magnetic objects, magnetic materials, etc., can solve problems such as the reduction of saturation magnetization, and achieve improved coercivity, high saturation magnetization, and crystal grains. The effect of refinement

Active Publication Date: 2018-12-07
宁波猎知乐科技咨询有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the increase of Mn content leads to a significant decrease in its saturation magnetization

Method used

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  • A kind of rare earth-free mnalcuc permanent magnet alloy and preparation method thereof
  • A kind of rare earth-free mnalcuc permanent magnet alloy and preparation method thereof
  • A kind of rare earth-free mnalcuc permanent magnet alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-1

[0043] Example 1-1: Preparation of anisotropic Mn 50 al 46 Cu 4 C 3 flake powder

[0044] (1) The pure manganese block, pure aluminum block, pure copper block and graphite powder with a purity of not less than 99.9% are calculated according to the atomic percentage of Mn 50 al 46 Cu 4 C 3 Weigh the master alloy raw material, because Mn is extremely volatile during smelting, in order to compensate for its volatilization during smelting, add more Mn with a mass percentage of 3% during batching, totaling 3 grams.

[0045] (2) Smelting in a non-consumable vacuum electric arc furnace: put the above-mentioned weighed master alloy raw materials into a copper crucible with circulating cooling water, and fill it with high-purity argon as a protective atmosphere after vacuuming, and heat the alloy repeatedly Melting 3 times to obtain ingot master alloy with uniform composition;

[0046] (3) the ingot obtained above is put into a quartz tube and evacuated to 10 -3 After pa, seal...

Embodiment 1-2

[0049] Example 1-2: Preparation of anisotropic Mn 50 al 46 Cu 4 C 3 flake powder

[0050] In step (4), the ball milling time was set to 3 hours, and others were the same as in Example 1. Mn obtained by ball milling for 3 hours 50 al 46 Cu 4 C 3 The XRD pattern of the powder is as figure 2 shown. Magnetic properties such as Figure 5 As shown in a, the powder has obvious magnetic anisotropy.

Embodiment 1-3

[0051] Example 1-3: Preparation of anisotropic Mn 50 al 46 Cu 4 C 3 flake powder

[0052] In step (4), the ball milling time was set to 5 hours, and others were the same as in Example 1. Mn obtained by ball milling for 5 hours 50 al 46 Cu 4 C 3 The morphology of flake powder is shown in Figure 4 As shown in (c,d), the XRD patterns are as follows figure 2 shown. Magnetic properties such as Figure 5 As shown in b, the powder has obvious magnetic anisotropy.

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Abstract

The invention relates to a rare-earth-free MnAlCuC permanent magnet alloy and a preparation method thereof. Mn<50+z>Al<50-x-z>Cu<x>C<y> with theoretical components is prepared based on atomic percentages; the well-prepared mother alloy raw material is put into a copper crucible with circulation cooling water by adopting a non-self-consumption vacuum arc furnace, and the alloy is smelted repeatedly for 3-4 times to obtain a MnAlCuC alloy ingot with uniform components; the MnAlCuC alloy is subjected to vacuum heat treatment to obtain a <tau>-phase MnAlCuC alloy; and the <tau>-phase MnAlCuC alloy is subjected to ball milling treatment to obtain <tau>-phase MnAlCuC alloy powder, namely the high-coercivity rare-earth-free MnAlCuC anisotropic permanent magnet alloy. Compared with the prior art, the permanent magnet alloy is low in cost and Mn content and simple in manufacturing process; and the prepared MnAlCuC permanent magnet alloy is high in permanent magnetic property, high in coercivity and high in saturation magnetization strength.

Description

technical field [0001] The invention belongs to the technical field of permanent magnet alloy preparation, and relates to a rare earth-free MnAl-based permanent magnet alloy and a preparation method thereof. Background technique [0002] Permanent magnet materials are widely used in human daily life, economic development, and national defense construction. For example, in the information industry, permanent magnet materials are widely used in magnetic memory, permanent magnet motors, etc.; in the medical field, nuclear magnetic resonance technology is widely used in medical analysis; various permanent magnet materials are also widely used in the field of satellite communications ground application. Permanent magnet materials are a class of extremely important functional materials, which have the advantages of energy saving, convenience, high efficiency and environmental protection, which are also in line with the development requirements of our times. In the past two decad...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/047H01F41/00H01F41/02C22C22/00C22C1/03C22F1/16
CPCC22C1/03C22C22/00C22F1/16H01F1/047H01F41/0253
Inventor 苏昆朋陈星星王海欧霍德璇柳菁菁黄帅
Owner 宁波猎知乐科技咨询有限公司
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