Nano foamed aluminum composite sandwich panel with gradient interface and preparation method thereof

A nano-foam and sandwich panel technology, applied in the field of foamed aluminum sandwich panel materials, can solve the problems of uneven interfacial stress, decreased mechanical strength, decreased bearing capacity, etc. The effect of improving the service life

Inactive Publication Date: 2017-07-28
DONGGUAN JIAQIAN NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the aluminum foam sandwich panel has good energy absorption characteristics, impact resistance, high specific strength, electromagnetic shielding, sound absorption performance, high damping, low thermal conductivity and electrical conductivity, etc., and is widely used in electronics, communications, chemical industry, metallurgy, machinery , construction, transportation, aerospace technology, military protection and other fields have broad application prospects, but the aluminum foam sandwich panel is prone to peeling of the surface layer when it is stressed, and its strength is low, which limits the application field
[0003] Chinese patent CN 103935080B discloses a polymer / aluminum foam integrated composite sandwich panel. The middle of the sandwich panel is an aluminum foam core layer, the upper and lower sides are polymer / aluminum foam composite layers, and the upper and lower surfaces are pure polymer protective surfaces. The two ends of the open-cell foam aluminum plate are respectively immersed in the polymer fluid and solidified. The composite sandwich panel prepared by this method replaces the metal surface layer. Good, but the mechanical strength is reduced compared to the metal finish, and the bearing capacity is reduced
It can be known from the above prior art that the existing aluminum foam sandwich panels are all at the obvious interface, and the structure and composition on both sides of the interface are discontinuous. When the mechanical load is applied, the interface stress is uneven or the stress is concentrated, which is easy to cause interface debonding or interface debonding. Shear and tear failure of adjacent foamed aluminum

Method used

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  • Nano foamed aluminum composite sandwich panel with gradient interface and preparation method thereof
  • Nano foamed aluminum composite sandwich panel with gradient interface and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Mix 139.3g of 150-mesh Al-11Si alloy powder with 0.7g of 325-mesh foaming agent titanium hydride powder on a mixer to make a mixed powder, and the mixing time is 8h. Among them, the aluminum alloy powder The mass fraction of the mixed powder is 99.5%, and the mass percentage of the titanium hydride powder is 0.5%.

[0036] (2) Take 1 / 4 of the mixed powder and mix it with titanium dioxide nanofibers, carbon nanotubes and micronized SiC with a mass ratio of 1:1:1, and ball mill for 1 hour to obtain the intermediate layer powder, wherein the nanomaterials account for the intermediate layer powder The mass percentage is 0.02%.

[0037] (3) Put 90g of 150-mesh 3003 aluminum alloy powder, 1 / 2 of the middle layer powder, 3 / 4 of the mixed powder, 1 / 2 of the middle layer powder and 90g of 150-mesh 3003 aluminum alloy powder into pre-processing And in the assembled abrasive tool, the three powders are distributed in layers. Each powder is pre-pressed with a steel pressure he...

Embodiment 2

[0042] (1) 261.1g of 150-mesh Al-10Si-0.5Mg alloy powder and 1.3g of 325-mesh blowing agent titanium hydride powder are mixed on the mixer to make mixed powder, and the mixing time is 8h, wherein, The aluminum alloy powder accounts for 99.5 percent by mass of the mixed powder, and the titanium hydride powder accounts for 0.5 percent by mass of the mixed powder.

[0043] (2) Take 1 / 4 of the mixed powder and mix it with titanium dioxide nanofibers, carbon nanotubes and micronized SiC with a mass ratio of 1:1:1, and ball mill for 3 hours to obtain the intermediate layer powder, wherein the nanomaterials account for the intermediate layer powder The mass percentage is 0.03%.

[0044] (3) Put 118.8g of 150-mesh pure aluminum powder, 1 / 2 of the middle layer powder, 3 / 4 of the mixed powder, 1 / 2 of the middle layer powder and 118.8g of 150-mesh pure aluminum powder into the pre-processing in sequence And in the assembled abrasive tool, the three powders are distributed in layers. Eac...

Embodiment 3

[0049] (1) Mix 400g of 150-mesh 6061 aluminum alloy powder with 4g of 325-mesh foaming agent titanium hydride powder on a mixer to make a mixed powder. The mixing time is 16 hours, and the aluminum alloy powder accounts for the mixed powder. The mass fraction of titanium hydride powder is 99.5%, and the mass percentage of titanium hydride powder in the mixed powder is 0.5%.

[0050] (2) Take 1 / 4 of the mixed powder and mix it with titanium dioxide nanofibers, carbon nanotubes and micron-grained SiC with a mass ratio of 1:1:1, and ball mill for 1.5 hours to obtain the intermediate layer powder, in which nanomaterials account for the intermediate layer The mass percentage of powder is 0.025%.

[0051] (3) 292g of 150 mesh Ti-6Al-4V alloy powder, 1 / 2 of the middle layer powder, 3 / 4 of mixed powder, 1 / 2 of the middle layer powder and 292g of 150 mesh Ti-6Al-4V alloy powder Load into the pre-processed and assembled grinding tools in sequence. The three powders are distributed in l...

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Abstract

The invention provides a nano foamed aluminum composite sandwich panel with a gradient interface and a preparation method thereof. The nano foamed aluminum composite sandwich panel with the gradient interface comprises upper and lower metal surface layers, upper and lower middle layers and a core layer. The core layer is a foamed aluminum sandwich layer with the gradient interface. The upper and lower middle layers are nano material and foamed aluminum composite layers. The upper and lower metal surface layers are made of one of aluminum, aluminum alloy, steel, titanium and titanium alloy. No clear interface exists between the upper and lower metal surface layers and the upper and lower middle layers as well as between the upper and lower middle layers and the foamed core layer, and a gradient interface area exists. Compositions and structures in the interface area achieve continuous transition, and mechanical strength of the nano material and foamed aluminum composite reinforced sandwich panel is high. The foamed aluminum sandwich panel prepared through the method is high in mechanical strength, long in service life, not prone to layering, capable of solving the surface layer stripping problem happening when the foamed aluminum sandwich panel is stressed and prolonging the service life of the foamed aluminum sandwich panel, simple in preparation method and high in size controllability.

Description

technical field [0001] The invention belongs to the technical field of aluminum foam sandwich panel materials, and in particular relates to a nano-foam aluminum composite sandwich panel with a gradient interface and a preparation method thereof. Background technique [0002] The foamed aluminum sandwich panel is a metal material with many cellular pores formed by a solid frame or a planar interlaced structure. The core layer of the foamed aluminum sandwich panel is foamed aluminum or foamed aluminum alloy, and the panel is a metal panel. The cell structure is divided into closed cells and closed cells. There are two forms of open cells. The open cell structure means that the internal cells are connected to each other, and each cell is not closed. The closed structure means that the internal cells are independent of each other, and each cell is closed. Therefore, the aluminum foam sandwich panel has good energy absorption characteristics, impact resistance, high specific stre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/11B22F7/02C22C47/14C22C49/06C22C49/14C22C101/02
CPCB22F3/1125B22F7/006C22C47/14C22C49/06C22C49/14
Inventor 王海燕
Owner DONGGUAN JIAQIAN NEW MATERIAL TECH CO LTD
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