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Soft magnetic high-entropy alloy powder and preparation method thereof

A high-entropy alloy and soft magnetic technology, applied in the field of high-entropy alloy powder, can solve problems such as undiscovered structure and performance research, and achieve high saturation magnetization, low coercive force, and good soft magnetic properties

Active Publication Date: 2019-01-11
HENAN INST OF ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are no reports on the microstructure and properties of the CoCrCuFeMnNi alloy system prepared by powder metallurgy in the existing literature, especially the preparation of high-entropy alloy powders with soft magnetic properties by mechanical alloying.

Method used

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  • Soft magnetic high-entropy alloy powder and preparation method thereof
  • Soft magnetic high-entropy alloy powder and preparation method thereof
  • Soft magnetic high-entropy alloy powder and preparation method thereof

Examples

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preparation example Construction

[0037] The preparation method of the described soft magnetic high entropy alloy powder of embodiment one to embodiment four, comprises the following steps:

[0038] (1) Weigh each alloy element powder on an electronic scale with an error of 0.1 mg according to the alloy composition shown in Table 1, then put it into a clean plastic bottle and mix it on a powder mixer for 5 hours at a speed of 200 rpm; The evenly mixed powder is put into a stainless steel ball mill tank, the ratio of ball to material is 10:1, the diameter of the stainless steel ball is 10mm and 5mm, the diameter of the two diameters of the stainless steel ball is 1:1, and two kinds of steel balls with different diameters are used in the The energy is higher and the efficiency is better during ball milling; then, the assembled ball mill jar is scrubbed with 99.999% high-purity argon gas for 5 minutes to avoid oxidation of the powder during ball milling. Finally, mechanical ball milling on the QM-WX4 type ball mi...

Embodiment 5

[0041] This example is basically the same and different from Example 1. The difference lies in: the preparation method of the soft magnetic high-entropy alloy powder, the dry milling time in step (1) is 45h, and then add the process inhibitor anhydrous ethanol, wet milling 5h, the mass ratio of absolute ethanol to alloying elements is 1:1.

Embodiment 6

[0043] This example is basically the same and different from Example 2. The difference lies in: the preparation method of the soft magnetic high-entropy alloy powder, the dry milling time in step (1) is 45h, and then add process inhibitor anhydrous ethanol, wet milling 5h, the mass ratio of absolute ethanol to alloying elements is 1:1.

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Abstract

The invention provides soft magnetic high-entropy alloy powder and a preparation method thereof. The soft magnetic high-entropy alloy powder is prepared by Co, Cr, Cu, Fe, Mn and Ni with a mole ratioof 0-2: 1: 1: 1: 1: 1; all alloying elements of the soft magnetic high-entropy alloy powder form nanocrystalline oversaturated solid solution structures with FCC structures as main components; the atomic percentages of all element contents approximate nominal components; the magnetic strength of the high-entropy alloy powder is 21-52 emu / g; the coercivity is 14-63 Oe; and the residual magnetism rate Mr / Ms is 3-16%. The high-entropy alloy powder prepared by mechanical alloying achieves higher saturated magnetic strength, lower coercivity and better soft magnetic property.

Description

technical field [0001] The invention relates to the technical field of high-entropy alloy powders, in particular to a soft magnetic high-entropy alloy powder and a preparation method thereof. Background technique [0002] A high-entropy alloy is a new type of alloy system composed of five or more metal elements and the atomic percentage of each element is between 5% and 35%. This multivariate high-entropy alloy has a high degree of disorder due to the mixing of multiple elements, resulting in different microstructure and performance characteristics from traditional alloys, such as high strength, wear resistance, corrosion resistance, oxidation resistance and good electromagnetic properties, causing widely concerned by domestic and foreign scholars. At present, the alloy systems that have been studied more mainly include CoCrFeMnNi, CoCrCuFeNi, CuCrFeMnNi and CoCrCuFeMn. These alloys show simple solid solution structure, good thermal stability and plasticity. Most of these ...

Claims

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Application Information

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IPC IPC(8): B22F1/00B22F9/04
CPCB22F1/0003B22F9/04B22F2009/041B22F2999/00B22F2201/11
Inventor 任波赵瑞锋刘忠侠张健健张红松刘扭参
Owner HENAN INST OF ENG
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