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Aluminum-based porous composite material as well as preparation method and application thereof

A composite material, aluminum-based porous technology, used in mechanical equipment, springs/shock absorbers, low internal friction springs, etc., can solve problems such as unfavorable impact energy, large stress peaks, relaxation absorption, etc.

Active Publication Date: 2021-07-06
GUANGDONG INST OF NEW MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing aluminum-based porous composite materials always have a large stress peak when impacted, and the components of each micro-domain tend to collapse in a short-term chain, which is not conducive to the relaxation and absorption of impact energy.

Method used

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  • Aluminum-based porous composite material as well as preparation method and application thereof
  • Aluminum-based porous composite material as well as preparation method and application thereof
  • Aluminum-based porous composite material as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0053] This embodiment provides a method for preparing an aluminum-based porous composite material, comprising the following steps:

[0054] (1) Preparation of composite blank raw materials: according to the volume fraction of hollow microspheres of 20%, 40% and 60%, respectively weigh 1100 aluminum powder with a mesh particle size of 200 to 400 mesh and Al powder with a mesh particle size of 60 to 150 mesh 2 o 3 Ceramic hollow microspheres (compressive strength is 38MPa), weigh a group of raw materials under the volume fraction of each group, put each group of raw materials into a mixer and mix for 2 hours, then add a mass fraction of 5% water glass binder (that is, the mass fraction of the water glass binder accounts for 5% of the total mass of the hollow microspheres and the aluminum powder) and mix for 4 hours.

[0055] (2) Prefabricated green body forming: the green body raw materials mixed uniformly in step (1) are laid in the steel mold layer by layer along the steel m...

Embodiment 2

[0060] This embodiment provides a method for preparing an aluminum-based porous composite material, comprising the following steps:

[0061] (1) Preparation of composite body raw materials: According to the volume fraction of hollow microspheres of 35%, 55% and 75%, respectively weigh 5A03 aluminum powder with a mesh size of 800-1000 mesh, and a mesh particle size of 150-400 mesh and 500-1000 mesh The purpose glass hollow microspheres (compressive strengths are 42MPa and 110MPa respectively), wherein, in the composite raw material with a volume fraction of hollow microspheres of 35%, the volume fraction ratio of 150-400 mesh and 500-1000 mesh is 2:1; In the composite raw material with a volume fraction of spheres of 55%, the ratio of volume fractions between 150-400 mesh and 500-1000 mesh is 1:1; The volume fraction ratio is 1:2; weigh a group of raw materials for each group of volume fractions, put each group of raw materials into a mixer and mix for 4 hours, then add 5% wate...

Embodiment 3

[0068] This embodiment provides a method for preparing an aluminum-based porous composite material, comprising the following steps:

[0069] (1) Preparation of composite body raw materials: According to the volume fraction of hollow microspheres being 20% ​​and 60%, respectively weigh 4032 aluminum powder with a mesh size of 200 to 400 mesh and iron hollow microspheres with a mesh size of 16 to 30 mesh (anti The compressive strength is 65 MPa), and each group of volume fractions weighs two groups of raw materials, puts each group of raw materials into a mixer and mixes them for 3 hours, then adds a mass fraction of 3% water glass binder and mixes them for 8 hours.

[0070] (2) Prefabricated green body forming: the green body raw material mixed uniformly in step (1), according to the order that the volume fraction of the hollow microspheres of the raw material is 20%-60%-20%-60% along the axial direction of the steel mold from bottom to bottom The top layer is laid in a steel m...

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Abstract

The invention discloses an aluminum-based porous composite material as well as a preparation method and application thereof, and relates to the technical field of composite materials. The preparation method of the aluminum-based porous composite material comprises the steps that multiple sets of composite blank raw materials are laid in a mold layer by layer and subjected to cold press molding, and a prefabricated blank is obtained; pressure infiltration is performed on the prefabricated blank by adopting an aluminum melt; the multiple sets of composite blank raw materials comprise aluminum material powder and hollow microspheres; and the proportions of the aluminum material powder and the hollow microspheres in every two adjacent sets of composite blank raw materials are different. The composite material with gradient distribution or periodic distribution of the hollow microspheres can be prepared through the preparation method, interlayer interface bonding is good, continuous transmission of impact loads is facilitated, and the material has more excellent buffering and energy absorbing performance.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to an aluminum-based porous composite material, its preparation method and application. Background technique [0002] At present, shock-resistant, shock-absorbing and energy-absorbing protective materials have a wide range of application requirements in the fields of aerospace, industrial construction, automobile safety, nuclear power chemical industry, and public safety. The aluminum-based porous composite material is a new type of cushioning and energy-absorbing material with hollow microspheres as "holes" and aluminum alloy as the matrix. It has the advantages of light weight, high specific strength, high rigidity, and functional designability. The aluminum-based porous composite material exhibits an excellent stress platform effect under dynamic loads. Compared with aluminum foam, its energy absorption performance is significantly improved, which is in line with the ...

Claims

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Application Information

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IPC IPC(8): B22D23/04F16F1/02
CPCB22D23/04F16F1/021F16F1/025
Inventor 林颖菲冯晓伟陈恒屈娇冯波路建宁罗铁钢
Owner GUANGDONG INST OF NEW MATERIALS
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