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Soft magnetic high-entropy alloy material of island magnetic crystal structure and preparation method thereof

A technology of high-entropy alloys and magnetocrystals, applied in magnetic materials, metal processing equipment, inductors/transformers/magnets, etc., can solve problems such as low resistivity, low toughness, and high brittleness of FeNi alloys

Active Publication Date: 2019-10-25
NANJING INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In soft magnetic alloy materials, traditional alloys have certain limitations in use, such as FeNi alloys with high brittleness, low toughness, and low resistivity, etc.

Method used

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  • Soft magnetic high-entropy alloy material of island magnetic crystal structure and preparation method thereof
  • Soft magnetic high-entropy alloy material of island magnetic crystal structure and preparation method thereof
  • Soft magnetic high-entropy alloy material of island magnetic crystal structure and preparation method thereof

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Embodiment 1

[0025] A method for preparing a soft magnetic high-entropy alloy material with an island magnetic crystal structure, comprising the steps of:

[0026] 1) Weigh Fe, Ni, Co, Cr, Cu metal powders with a purity of 99.99% in a molar ratio of 1:1:2:1:1, and the particle size of the powder is ≤45 μm;

[0027] 2) Put the powder weighed in step 1) into a stainless steel ball mill tank, use stainless steel balls as the grinding body, and perform ball milling at a ball-to-powder mass ratio of not less than 10:1. Before ball milling, use a vacuum machine to evacuate for 3 minutes, and then rush into 0.5MPa argon as a protective gas; first perform dry milling, the speed of the ball mill is 400r / min, and the rotation direction is adjusted every 60 minutes.

[0028] Add absolute ethanol to the powder after dry milling for 45 hours, and carry out wet milling for 5 hours at a wet milling speed of 200 r / min. After the ball milling, take out the ball mill jar, open the lid of the ball mill jar ...

Embodiment 2

[0034] A method for preparing a soft magnetic high-entropy alloy material with an island magnetic crystal structure, comprising the steps of:

[0035]1) Weigh Fe, Ni, Co, Mn, Al metal powders with a purity of 99.99% in a molar ratio of 1:1:1:1:1, and the particle size of the powder is ≤45 μm;

[0036] 2) Put the powder weighed in step 1) into a stainless steel ball mill tank, use stainless steel balls as the grinding body, and perform ball milling at a ball-to-powder mass ratio of not less than 10:1. Before ball milling, use a vacuum machine to evacuate for 3 minutes, and then rush into 0.5MPa argon as a protective gas; first perform dry milling, the speed of the ball mill is 400r / min, and the rotation direction is adjusted every 60 minutes.

[0037] Add absolute ethanol to the powder after dry milling for 40 hours, carry out wet milling for 5 hours, and the wet milling speed is 300r / min. After the ball milling, take out the ball mill jar, open the lid of the ball mill jar to...

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Abstract

The invention discloses a soft magnetic high-entropy alloy material of an island magnetic crystal structure. The soft magnetic high-entropy alloy material is of a core-shell structure. By taking a micro-nano high-entropy alloy with soft magnetic performance as a core and a nonmagnetic metal oxide which is prepared by a hydrothermal method and coats a magnetic crystal surface layer of the micro-nano high-entropy alloy as a shell, high-entropy alloy magnetic crystals of the core-shell structure are densified by spark plasma sintering to form the soft magnetic of the island magnetic crystal structure. The nano magnetic crystals of the soft magnetic material obtained by the preparation method generate a magnetic coupling effect, so that the saturated magnetic intensity and the coercive force of the high-entropy alloy are improved favorably.

Description

technical field [0001] The invention relates to a soft magnetic high-entropy alloy material with an island magnetic crystal structure and a preparation method thereof, belonging to the technical field of magnetic materials. Background technique [0002] Bulk high-entropy alloys (HEA) have a series of excellent mechanical properties different from traditional crystalline alloys, such as high strength, high hardness, low elastic modulus, and large elastic strain limit, making them considered as very potential structural materials . However, the magnetic properties of high-entropy alloys, especially the soft magnetic properties, have not been effectively researched and developed, which seriously restricts the practical engineering application of functional high-entropy alloys. Therefore, how to use the magnetic field exchange coupling effect to improve the magnetic saturation strength and coercive force of high-entropy alloys, and prepare high-entropy alloys with excellent sof...

Claims

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Application Information

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IPC IPC(8): C22C30/02B22F1/02B22F9/04B22F3/105H01F1/147H01F41/00
CPCC22C30/02B22F9/04B22F3/105H01F1/1475H01F41/00B22F2009/043B22F1/07B22F1/054B22F1/16
Inventor 柳泽林杨少锋吴臻煜韩冰黄玉安
Owner NANJING INST OF TECH
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