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

An aluminum-based composite material and high-entropy alloy technology, which is applied in the field of composite materials to achieve the effects of high hardness elongation, uniform particle distribution, and high interface bonding strength

Active Publication Date: 2015-03-04
GUANGDONG XINGFA ALUMINUM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, so far there is no literature report on the preparation of high-strength and tough aluminum matrix composites using high-entropy alloy powder reinforcement phase

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Mixed powder: AlCrFeNiCoTi series high-entropy alloy particles are selected as the reinforcing phase, the composition is Al0.25CrFeNiCoTi0.75, the average particle size is 30 μm, and the volume fraction is 10%. In this example, the high-entropy alloy particles were prepared by mechanical alloying process, using a planetary ball mill for mechanical alloying, the rotation speed was ≥250rpm, the ball milling time was 50 hours, and the ball-to-material ratio was 15:1. The aluminum alloy matrix is ​​7075Al in the 7xxx series alloy, and its volume fraction is 90%; the corresponding weight of high-entropy alloy particles and aluminum alloy powder is weighed out with an electronic balance, put into a ball mill jar and sealed, and then dry Mixing method Mix powder for 10 hours;

[0029] (2) Sheath billet making: put the Al0.25CrFeNiCoTi0.75 high-entropy alloy particles and 7075Al powder into the aluminum alloy sheath after the powder mixing is completed, and compact the powd...

Embodiment 2

[0033] (1) Mixed powder: AlCrFeNiCoTi series high-entropy alloy particles are selected as the reinforcing phase. The specific composition of the high-entropy alloy is Al0.25CrFeNiCoTi0.75, the average particle size is 30 μm, and the volume fraction is 20%. In this example, the high-entropy alloy particles were prepared by mechanical alloying process, using a planetary ball mill for mechanical alloying, the rotation speed was ≥250rpm, the ball milling time was 50 hours, and the ball-to-material ratio was 15:1. The aluminum alloy matrix is ​​7075Al in the 7xxx series alloy, and its volume fraction is 80%; the corresponding weight of high-entropy alloy particles and aluminum alloy powder is weighed out with an electronic balance, put into a ball mill jar and sealed, and then dry Mixing method Mix powder for 15 hours;

[0034] (2) Sheath billet making: put the Al0.25CrFeNiCoTi0.75 high-entropy alloy particles and 7075Al powder into the aluminum alloy sheath after the powder mixing...

Embodiment 3

[0038](1) Mixed powder: AlCrFeNiCoTi series high-entropy alloy particles are selected as the reinforcing phase. The specific composition of the high-entropy alloy is Al0.5CrFeNiCoTi0.5, the average particle size is 30 μm, and the volume fraction is 25%. In this example, the high-entropy alloy particles were prepared by mechanical alloying process, using a planetary ball mill for mechanical alloying, the rotation speed was ≥250rpm, the ball milling time was 50 hours, and the ball-to-material ratio was 15:1. The aluminum alloy matrix is ​​6061Al in the 6xxx series alloy, and its volume fraction is 75%; the corresponding weight of high-entropy alloy particles and aluminum alloy powder is weighed out with an electronic balance, put into a ball mill jar and sealed, and then dry Mixing method Mix powder for 12 hours;

[0039] (2) Sheath billet making: put the Al0.5CrFeNiCoTi0.5 high-entropy alloy particles and 6061Al powder after powder mixing into the aluminum alloy sheath, and use...

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Abstract

The invention belongs to the technical field of composite materials and discloses a high-entropy alloy reinforced aluminum-based composite material and a preparation method thereof. The composite material takes high-entropy alloy as a reinforcing phase and takes aluminum alloy as a base body. The preparation method of the composite material comprises the following steps: packaging high-entropy alloy particles and aluminum alloy powder into a ball milling tank, sealing and mixing the powder for 5-25 hours to obtain a mixed material; packaging the mixed material into a bag; applying a pressure of 5MPa to 15MPa at room temperature to compact the mixed material in the bag to obtain a semi-finished product; putting the compacted semi-finished product into thermal extruding equipment, preheating the semi-finished product to 400-480 DEG C, preheating a mold to 200-400 DEG C, keeping the temperature of the semi-finished product and the mold for 1-3 hours to finish the preheating process, and then performing hot extrusion formation at an extrusion pressure of 5MPa to 15MPa and at an extrusion ratio of 4 to 25 to obtain the high-entropy alloy reinforced aluminum-based composite material.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a high-entropy alloy-reinforced aluminum-based composite material and a preparation method thereof. Background technique [0002] Particle reinforced aluminum matrix composites have excellent properties such as high specific strength, high specific modulus, wear resistance and good dimensional stability. As a new type of structural and functional material, it has broad application prospects in aerospace, military, electronics, instrumentation and other fields. However, due to the poor plasticity and toughness of particle reinforced aluminum matrix composites, this limits its application in structural materials. How to improve its plasticity and toughness has always been the goal pursued by researchers. [0003] For a long time, the research on the design and preparation process of particle-reinforced aluminum matrix composites has been relatively in-dept...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C1/04
Inventor 朱德智陈奇丁霞
Owner GUANGDONG XINGFA ALUMINUM
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