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Magnesium/aluminum multi-layer composite material and preparation method thereof

A technology of multi-layer composite material and aluminum-based composite material, which is applied in the field of powder metallurgy to achieve the effects of reducing production cost, good economy and short production cycle

Active Publication Date: 2019-10-25
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few reports on the preparation of high-performance magnesium / aluminum bilayer composites by spark plasma sintering.

Method used

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  • Magnesium/aluminum multi-layer composite material and preparation method thereof
  • Magnesium/aluminum multi-layer composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0047] step one

[0048] Select a cylindrical graphite mold with an inner diameter of 20mm, and lay a thin layer of graphite paper along the inner wall of the female mold to avoid the sample from sticking to the mold. First, pour 5.5g of spherical magnesium powder with a particle size of 80μm into the graphite mold, and after simple vibration and flattening, Then 8.5 g of nearly spherical aluminum powder with a particle size of 50 μm was poured into the mold to form a magnesium / aluminum laminated powder structure.

[0049] step two

[0050] Load the magnesium / aluminum laminate powder structure obtained in step 1 into the plasma sintering furnace together with the graphite mold, and reduce the vacuum to 5×10 -3 Pa, heat up rapidly at 50°C / min to 410°C, then heat up to 430°C at 5°C / min and hold for 5 minutes, apply 20MPa during the process of heating and holding, cool to room temperature at 50°C / min after holding, take it out and get Magnesium / aluminum double layer composite. ...

example 2

[0053] step one

[0054] Select a cylindrical graphite mold with an inner diameter of 20 mm, and lay a thin layer of graphite paper along the inner wall of the female mold to avoid the sample from sticking to the mold. First, pour 5.5 g of spherical AZ61 magnesium alloy powder with a particle size of 80 μm into the graphite mold, and after simple vibration and pressing Then pour 8.5g of nearly spherical 2024 aluminum alloy powder with a particle size of 50 μm into the mold to form a magnesium / aluminum laminated powder structure.

[0055] step two

[0056] Load the magnesium / aluminum laminate powder structure obtained in step 1 into the plasma sintering furnace together with the graphite mold, and reduce the vacuum to 4×10 -3 Pa, firstly heat up rapidly to 410°C at 100°C / min, then heat up to 430°C at 20°C / min and hold for 5 minutes, apply 30MPa during the process of heating and holding, cool to room temperature at 50°C / min after holding, take it out and get Magnesium / aluminum...

example 3

[0059] step one

[0060] Select a cylindrical graphite mold with an inner diameter of 20 mm, and lay a thin layer of graphite paper along the inner wall of the female mold to avoid the sample from sticking to the mold. First, pour 5.5 g of spherical AZ61 magnesium alloy powder with a particle size of 80 μm into the graphite mold, and after simple vibration and pressing Then pour 8.5g of nearly spherical 2024 aluminum alloy powder with a particle size of 50 μm into the mold to form a magnesium / aluminum laminated powder structure.

[0061] step two

[0062] Load the magnesium / aluminum laminate powder structure obtained in step 1 into the plasma sintering furnace together with the graphite mold, and reduce the vacuum to 3×10 -3 Pa, heat up rapidly at 100°C / min to 410°C, then heat up to 440°C at 10°C / min and hold for 5 minutes, apply 40MPa during the process of heating and holding, cool to room temperature at 50°C / min after holding, take it out and get Magnesium / aluminum double ...

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Abstract

The invention relates to a powder metallurgy technology, in particular to a magnesium / aluminum multi-layer composite material and a preparation method thereof. The invention aims to solve the problemof bad connection property of magnesium / aluminum dissimilar materials caused by restriction of the prior art; meanwhile, by a compaction and connection integrated forming technology, significant economic benefit is created. The preparation method comprises the following steps: performing laminating and powder paving on aluminum-containing powder and magnesium-containing powder in a mold, heating to 430 to 440 DEG C by a gradient heating mode, controlling the pressure to 20 to 45 MPa and performing spark plasma sintering to further obtain the well-connected magnesium / aluminum multi-layer composite material with a compact base body. The magnesium / aluminum multi-layer material prepared by the method has the advantages of few processes, short time and excellent combination property. The preparation method is suitable for preparation of a series of magnesium / aluminum based composite materials and can be extended to preparation of other dissimilar metal double-layer structure materials withapproximate sintering temperature. The preparation method is simple to operate, easy to control and convenient in industrialized application.

Description

technical field [0001] The invention relates to powder metallurgy technology, in particular to a magnesium / aluminum multilayer composite material and a preparation method thereof. Background technique [0002] The new lightweight composite material has the characteristics of low density, high specific strength, and excellent comprehensive performance. Its huge application prospect is unmatched by a single material, especially in aerospace, automobile manufacturing and other fields. Magnesium, aluminum and their alloys, which are also lightweight metals, have made outstanding contributions to modern industrial manufacturing. The wide application of the two in various fields will inevitably lead to the connection of magnesium / aluminum dissimilar metals. Therefore, research on the preparation technology of magnesium / aluminum double-layer composite materials can not only greatly reduce the quality of all-aluminum structure products, but also take into account the excellent prope...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F3/105B22F7/02
CPCB22F3/105B22F7/02B22F2999/00B22F1/05B22F2201/20
Inventor 马运柱伍镭刘文胜刘洋杨伦
Owner CENT SOUTH UNIV
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