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A kind of high-entropy alloy reinforced aluminum matrix composite material and its preparation method

A technology of aluminum-based composite materials and high-entropy alloys, applied in the field of composite materials, to achieve the effects of high hardness, high elongation, and high interface bonding strength

Active Publication Date: 2016-05-04
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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  • A kind of high-entropy alloy reinforced aluminum matrix composite material and its preparation method
  • A kind of high-entropy alloy reinforced aluminum matrix composite material and its preparation method
  • A kind of high-entropy alloy reinforced aluminum matrix composite material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Powder mixing: AlCrFeNiCoTi series high-entropy alloy particles are selected for the reinforcement phase, the composition is Al0.25CrFeNiCoTi0.75, the average particle size is 30μm, and the volume fraction is 10%. In this example, the high-entropy alloy particles are prepared by a mechanical alloying process, and a planetary ball mill is used for mechanical alloying, the speed is ≥250 rpm, the ball milling time is 50 hours, and the ball-to-battery ratio is 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 are weighed out with an electronic balance, and they are placed in a grinding tank and sealed, and then dried with a common dry Mixing method: Mix powder for 10h;

[0029] (2) Encapsulation billet: After powder mixing, the Al0.25CrFeNiCoTi0.75 high-entropy alloy particles and 7075Al powder are packed into the aluminum alloy sleeve, and...

Embodiment 2

[0033] (1) Powder mixing: AlCrFeNiCoTi series high-entropy alloy particles are selected for the reinforcement phase, the specific composition of the high-entropy alloy is Al0.25CrFeNiCoTi0.75, the average particle size is 30μm, and the volume fraction is 20%. In this example, the high-entropy alloy particles are prepared by a mechanical alloying process, and a planetary ball mill is used for mechanical alloying, the speed is ≥250 rpm, the ball milling time is 50 hours, and the ball-to-battery ratio is 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, and they are placed in a grinding pot and sealed, and then dried with a common dry Mixing method mixing powder for 15h;

[0034] (2) Encapsulation billet: After powder mixing, the Al0.25CrFeNiCoTi0.75 high-entropy alloy particles and 7075Al powder are packed ...

Embodiment 3

[0038] (1) Powder mixing: AlCrFeNiCoTi series high-entropy alloy particles are selected for the reinforcement phase. The specific composition of the high-entropy alloy is Al0.5CrFeNiCoTi0.5, the average particle size is 30μm, and the volume fraction is 25%. In this example, the high-entropy alloy particles are prepared by a mechanical alloying process, and a planetary ball mill is used for mechanical alloying, the speed is ≥250 rpm, the ball milling time is 50 hours, and the ball-to-battery ratio is 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 are weighed out with an electronic balance, and they are put into a grinding tank and sealed, and then dried with a common dry Mixing method mixing powder for 12h;

[0039] (2) Blanket making by sheathing: After powder mixing, the Al0.5CrFeNiCoTi0.5 high-entropy alloy particles and 6061Al powder are pac...

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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 specifically 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 dimensional stability. As a new type of structural and functional material, it has broad application prospects in aerospace, military industry, 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 in-depth, mainly invol...

Claims

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Application Information

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