Foamed aluminum sandwich structure composite material and preparing method thereof

A composite material and sandwich structure technology, applied in the field of materials, can solve problems such as interface debonding damage, and achieve the effects of improving the interface bonding strength, reducing the preparation cost and improving the preparation efficiency.
CN106273902AActive Publication Date: 2017-01-04SHENZHEN ACAD OF AEROSPACE TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHENZHEN ACAD OF AEROSPACE TECH
Publication Date
2017-01-04

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Abstract

The invention provides a foamed aluminum sandwich structure composite material and a preparing method thereof. The foamed aluminum sandwich structure composite material comprises a foamed aluminum core material, a toughening interface layer and skin, wherein the toughening interface layer is located between the foamed aluminum core material and the skin, the toughening interface layer is made of an epoxy resin composite material, and the epoxy resin composite material is composed of an epoxy resin matrix, a toughening agent, a diluent, hollow microspheres, chopped fiber, a curing agent and an accelerant; pores in the surface of the foamed aluminum core material is filled with the epoxy resin composite material to form the toughening interface layer. According to the technical scheme, the toughening interface layer is formed between the composite material skin and the foamed aluminum core material by means of multi-component low-density epoxy filling adhesive, and interface bonding strength can be effectively improved; by means of the skin designed based on functional gradient, the interface bonding property of the foamed aluminum sandwich structure in a humid and hot environment is improved, and the impact resistance of the foamed aluminum sandwich structure is improved.
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Description

technical field

[0001] The invention belongs to the technical field of materials, in particular to an aluminum foam sandwich structure composite material and a preparation method thereof. Background technique

[0002] Sandwich structure composites are composed of a thin, high-strength skin and a low-density core. Due to its outstanding advantages such as high specific stiffness and light weight, it has been widely used in aerospace, automobile, rail transit, construction and other engineering fields. The foam core materials used in traditional sandwich structures include polymer foams such as PU, PS, PVC, and PET, but their application fields are limited due to their high temperature resistance and poor flame retardancy. Aluminum foam is formed by adding additives to pure aluminum or aluminum alloy and foaming. It has excellent comprehensive properties such as low density, high temperature resistance, low thermal conductivity, sound insulation and flame retardancy. The app...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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