High-entropy alloy reinforced aluminum matrix composite material and preparation method thereof

A technology of high-entropy alloys and composite materials, which is applied in the field of high-entropy alloy-reinforced aluminum-matrix composites and its preparation, and can solve the problem of low hardness and wear resistance of aluminum alloys, affecting the application of aluminum-matrix composites, and poor wettability, etc. problem, to achieve the effect of low production cost, no component segregation, and fine grain

Active Publication Date: 2021-01-08
JIANGSU OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hardness and wear resistance of aluminum alloys are generally not high. Currently, SiC and B 4 Aluminum matrix composites prepared with C and other reinforcing phases can effectively improve the hardness and other properties of aluminum alloys. However, ceramic particles have disadvantages such as poor

Method used

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  • High-entropy alloy reinforced aluminum matrix composite material and preparation method thereof
  • High-entropy alloy reinforced aluminum matrix composite material and preparation method thereof
  • High-entropy alloy reinforced aluminum matrix composite material and preparation method thereof

Examples

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Example Embodiment

[0028]Such asimage 3 As shown, the preparation method of the high-entropy alloy reinforced aluminum-based composite material of the present invention includes the following steps:

[0029]S01. Weigh 5mol%~35mol% Al, 5mol%~35mol% Fe, 5mol%~35mol% Ni, 5mol%~35mol% Si, 5mol%~35mol% Ti metal powder according to the following molar ratios, The weighed metal powders are mixed to obtain amorphous high-entropy alloy powder. The weighing of each metal powder is carried out in a vacuum glove box, and the particle size of each metal powder is 200-300 mesh. The mixing of the metal powders is carried out in a vacuum ball mill tank, the ball milling time is 180-250h, and the ball mill speed is 200-400r / min. The vacuum ball milling tank is evacuated and an inert protective gas argon is filled in the vacuum ball milling tank, so that the mixing of the metal powders is performed under an inert gas atmosphere.

[0030]S02, mixing the high-entropy alloy powder and aluminum powder obtained in S01 according t...

Example Embodiment

[0034]Example 1

[0035]S01. Preparation of AlFeNiSiTi high-entropy alloy powder Ⅰ

[0036]Weigh 20mol% of Al powder, 20mol% of Fe powder, 20mol% of Ni powder, 20mol% of Si powder, 20mol% of Ti powder in a vacuum glove box, each with a particle size of 300 meshes, and put 5 kinds of powder into it Add cemented carbide balls to the stainless steel ball mill tank, the ball-to-battery ratio is 10:1, the weight ratio of large, medium and small balls is 1:2:3, and then add 1% of the total mass of the powder n-heptane, and then the ball mill tank first The vacuum is drawn and then filled with high-purity argon for inert gas protection. The planetary ball mill is used for 220h ball milling with a speed of 300r / min. In order to prevent the tank from overheating due to long-term ball milling, the mill will be shut down for 1h every 10h. After 220h of ball milling, the powders are completely alloyed, resulting in AlFeNiSiTi amorphous high-entropy alloy powder. The powder XRD pattern is as attachedf...

Example Embodiment

[0041]Example 2

[0042]S01. Preparation of AlFeNiSiTi high-entropy alloy powder Ⅱ

[0043]Weigh 10mol% of Al powder, 25mol% of Fe powder, 25mol% of Ni powder, 20mol% of Si powder, 20mol% of Ti powder in a vacuum glove box, each with a particle size of 200 meshes. Pack 5 powders Put into the stainless steel ball mill tank, add cemented carbide balls, the ball-to-battery ratio is 10:1, the weight ratio of large, medium and small balls is 1:2:3, and then add 2% of the total mass of the powder n-heptane, and then the ball mill tank The vacuum is drawn first and then filled with high-purity argon for inert gas protection. The planetary ball mill is used on the planetary ball mill with a speed of 400r / min for 200h ball milling. In order to prevent the tank from overheating due to long time ball milling, the ball mill will be shut down for 1h every 20h.

[0044]S02. Preparation of pre-mixed powder Ⅱ

[0045]Weigh the high-entropy alloy powder and Al powder prepared in S01 according to the mass ratio ...

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Abstract

The invention discloses a high-entropy alloy reinforced aluminum matrix composite material and a preparation method thereof. The composite material takes aluminum as a matrix and high-entropy alloy asa reinforcing phase, wherein the mass ratio of the high-entropy alloy to the aluminum is 1: 1-2, and the high-entropy alloy is AlFeNiSiTi series high-entropy alloy. The preparation method comprises the following steps that Al, Fe, Ni, Si and Ti metal powder with nearly equal molar ratio are weighed, and mixed to obtain amorphous high-entropy alloy powder; the high-entropy alloy powder and aluminum powder are mixed according to the mass ratio of 1: 1-2 to obtain premixed powder, and the obtained premixed powder is preheated; and a spray co-deposition method is adopted, the premixed powder serves as a particle reinforced phase, and is sprayed into atomized particle jet flow of aluminum melt, the premixed powder and the atomized particle jet flow are jointly deposited on a cold substrate toprepare the composite material with the aluminum as a base body and the high-entropy alloy as the reinforcing phase.

Description

technical field [0001] The invention relates to the technical field of metal material processing, in particular to a high-entropy alloy reinforced aluminum matrix composite material and a preparation method thereof. Background technique [0002] High-entropy alloys are a class of alloys with high mixing entropy composed of 5 to 13 elements. They have excellent comprehensive properties and are known as one of the most promising materials in the future. At present, the research on high-entropy alloys mainly focuses on the properties of single-phase solid solutions such as CoCrFeNi and CrFeNiCu, and most of the preparation methods used are arc melting. Arc melting inevitably produces problems such as thermal expansion and condensation, which lead to defects such as many voids in the prepared high-entropy alloys, which will greatly limit the development of high-entropy alloy systems and preparation processes. [0003] In the prior art, some aluminum alloys are prepared by spray...

Claims

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Application Information

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IPC IPC(8): B22F3/115C22C21/00C22C1/04
CPCB22F3/115C22C21/00C22C1/0416
Inventor 贺毅强任昌旭徐虎林左立杰刘勇穆昱学
Owner JIANGSU OCEAN UNIV
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