Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Radial negative gradient foamed aluminum sandwich panel and preparation method thereof

A technology of radial gradient and foamed aluminum, which is applied in chemical instruments and methods, laminated, layered products, etc., can solve the problems that affect popularization and application, low strength and limitations of uniform foamed aluminum sandwich panels, and achieve broad application prospects , high specific stiffness and reasonable structure

Active Publication Date: 2020-05-26
TAIYUAN UNIV OF TECH
View PDF9 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the low strength of homogeneous foamed aluminum sandwich panels restricts and affects its popularization and application in load-bearing structures, and from the perspective of light weight, the homogeneous foam core layer in sandwich panels is not optimal, so It is necessary to design an optimized inner core structure and preparation method to meet the application requirements of foamed aluminum sandwich panels

Method used

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Radial negative gradient foamed aluminum sandwich panel and preparation method thereof
  • Radial negative gradient foamed aluminum sandwich panel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] First, select closed-cell aluminum foams of different densities, and use a wire-cut electric discharge machine to cut the foam materials into cylindrical, circular, and other shapes of the same volume, and splicing and combining them according to the density. Taking the density change area divided into three layers as an example, the central layer is in the shape of a cylinder with a density of ρ 1 ; The middle layer is in the shape of a ring with a density of ρ 2 ;The outermost layer is a cube or cuboid after removing the cylinder inside, and the density is ρ 3 ,but ρ 1 ρ 2 ρ 3 ; According to the order of density and shape, weld or bond to obtain the radial gradient aluminum foam unit cell 3 . The porosity of the radial gradient aluminum foam unit cell gradually changes from the inside to the outside along the radial direction, from 90% to 50%.

[0029]Then, a certain number of radially negative gradient aluminum foam cells 3 are arranged sequentially in the p...

Embodiment 2

[0031] Example 2: First, using the method for preparing gradient porous materials in Chinese patent CN 101418391 B, the matrix powder is mixed with a porogen, and then absolute ethanol is added to prepare a suspension; then the suspension is poured into a mold, and then Centrifugal deposition; drying after centrifugal deposition, taking out the rough after demoulding, and then sintering in a graphite mold to obtain a billet; removing the porogen in the billet to obtain a radial negative gradient aluminum foam unit cell 3. The porosity of the radially gradient aluminum foam density gradually changes from the inside to the outside along the radial direction, from 80% to 10%, and the pore size is 30-480µm;

[0032] Then, a certain number of radially negative gradient aluminum foam cells 3 are arranged sequentially in the plane, and the surface contact parts between the cells are welded to obtain the radial gradient aluminum foam core layer 2 .

[0033] Finally, use sandpaper to p...

Embodiment 3

[0034] Example 3: First, select closed-cell aluminum foams of different densities, and use a wire-cut electric discharge machine to cut the foam materials into shapes such as cylinders and rings of the same volume, and splice and combine them according to the density. Taking the density change area divided into three layers as an example, the central layer is in the shape of a cylinder with a density of ρ 1 ; The middle layer is in the shape of a ring with a density of ρ 2 ;The outermost layer is a cube or cuboid after removing the cylinder inside, and the density is ρ 3 ,but ρ 1 ρ 2 ρ 3 ; According to the order of density and shape, weld or bond to obtain the radial gradient aluminum foam unit cell 3 . The density of the radial gradient aluminum foam is that the porosity gradually changes from the inside to the outside along the radial direction, from 90% to 50%.

[0035] Then, a certain number of radial negative gradient aluminum foam cells 3 are arranged sequential...

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
Login to View More

PUM

PropertyMeasurementUnit
sizeaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the technical field of structural design of metal materials, and provides a radial negative gradient foamed aluminum sandwich panel. The aluminum sandwich panel is of a layered structure and sequentially comprises a lower plate layer, a radial negative gradient foamed aluminum core layer and an upper plate layer from bottom to top. The inner surfaces of the upper plate andthe lower plate are connected and fixed with the top and the bottom of the radial gradient foamed aluminum core layer by gluing or welding; the radial negative gradient foamed aluminum core layer isformed by sequentially arranging a plurality of radial negative gradient foamed aluminum unit cells in a plane, and the contact parts between the unit cells are welded or subjected to secondary foaming connection; the density of the negative gradient foamed aluminum unit cells starts from the center of a square and is gradually increased in the radius direction. The panel is reasonable in structure, excellent in performance, low in density, large in specific stiffness, high in specific strength, good in stability, impact resistance, electromagnetic shielding, excellent in damping characteristic, low in heat conductivity and electric conductivity, heat-insulating and sound-insulating, and has wide application prospects in the fields of engineering materials for chemical engineering, metallurgy, machinery, building civil engineering, high-speed automobiles, ships, packaging and transportation, aerospace, military protection and the like.

Description

technical field [0001] The invention belongs to the technical field of metal material structure design, and specifically relates to a radial negative gradient aluminum foam sandwich panel and a preparation method thereof; the radial negative gradient aluminum foam sandwich panel is suitable for civil engineering, aerospace, high-speed train ships, Fan blades and other engineering materials. Background technique [0002] Aluminum foam is made by adding additives to pure aluminum or aluminum alloy after foaming process. It has both metal and air bubble characteristics. It is a new multi-functional material with complex mesoscopic structure. It has high specific strength, specific High stiffness and good energy absorption and other characteristics. Gradient foam material refers to a material whose composition or structure changes gradually so that the corresponding mechanical properties of the material change. There are many types of gradient foam materials, such as hierarchi...

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
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B32B15/01B32B15/08B32B15/18B32B15/20B32B17/06B32B3/22B32B7/10B32B7/12B32B37/10B32B37/12
CPCB32B3/18B32B5/18B32B7/10B32B7/12B32B15/046B32B15/18B32B15/20B32B17/066B32B27/065B32B37/06B32B37/12B32B2250/40B32B2266/045B32B2307/102B32B2307/212B32B2307/304B32B2307/558B32B2307/56B32B2307/718B32B2307/722
Inventor 王根伟王维刘冕宋辉郭美卿
Owner TAIYUAN UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com