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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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  • 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 interfacial bonding and poor wettability as a reinforcing phase, which affects the application of aluminum matrix composites in aerospace and aerospace. Application in marine equipment
[0007] At present, there are few reports at home and abroad on the preparation of high-entropy alloy composites by spray co-deposition

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

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preparation example Construction

[0028] Such as image 3 As shown, the preparation method of the high-entropy alloy reinforced aluminum matrix composite material of the present invention comprises the following steps:

[0029] S01. Weigh 5mol%-35mol% of Al, 5mol%-35mol% of Fe, 5mol%-35mol% of Ni, 5mol%-35mol% of Si, 5mol%-35mol% of Ti metal powder according to the following molar ratios, The weighed metal powders are mixed to obtain amorphous high-entropy alloy powders. The weighing of each metal powder is carried out in a vacuum glove box, and the particle diameter of each metal powder is 200-300 mesh. The mixing of various 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. Vacuum is extracted from the vacuum ball milling jar and filled with an inert protective gas argon in the vacuum ball milling jar, so that the mixing of each metal powder is carried out under an inert gas atmosphere.

[0030] S02. Mix the high-entropy all...

Embodiment 1

[0035] S01. Preparation of AlFeNiSiTi High Entropy Alloy Powder Ⅰ

[0036] In a vacuum glove box, weigh 20mol% of Al powder, 20mol% of Fe powder, 20mol% of Ni powder, 20mol% of Si powder, and 20mol% of Ti powder. In the stainless steel ball milling tank, add cemented carbide balls, the ball-to-material ratio is 10:1, the weight ratio of large, medium and small balls is 1:2:3, then add n-heptane whose mass is 1% of the total powder mass, and then the ball milling tank is first Vacuum is extracted and then filled with high-purity argon for inert gas protection. On the planetary ball mill, the rotating speed is 300r / min for 220h ball milling. In order to prevent the tank body from overheating due to long-term ball milling, stop the machine for 1 hour every 10 hours of ball milling. After 220 hours of ball milling, the powder is completely alloyed, resulting in AlFeNiSiTi amorphous high-entropy alloy powder. The XRD pattern of the powder is shown in the attached figure 1 As show...

Embodiment 2

[0042] S01. Preparation of AlFeNiSiTi High Entropy Alloy Powder Ⅱ

[0043] Weigh 10mol% Al powder, 25mol% Fe powder, 25mol% Ni powder, 20mol% Si powder, 20mol% Ti powder in a vacuum glove box, the powder particle size is 200 mesh, and the 5 kinds of powders are packed Put it into the stainless steel ball milling tank, add hard alloy balls, the ball-to-material ratio is 10:1, the weight ratio of large, medium and small balls is 1:2:3, then add n-heptane with a quality of 2% of the total powder mass, and then the ball milling tank First extract the vacuum and then fill it with high-purity argon for inert gas protection. On the planetary ball mill, the rotating speed is 400r / min for 200h of ball milling. In order to prevent the tank body from overheating due to long-term ball milling, stop the machine for 1 hour every 20 hours of ball milling.

[0044] S02. Preparation of premixed powder Ⅱ

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

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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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