Aluminum-based dot matrix material based on 3D printing technology and preparation method thereof

Abstract

The invention discloses an aluminum-based dot matrix material based on 3D printing technology. In the dot matrix material, industrial pure aluminum or any aluminum alloy is employed as a base body. Unit cell configuration and a periodic structure thereof are modeled and designed with CATIA software and the model is produced from high-molecular materials through the 3D printing technology. An investment casting shell mould is prepared from soluble gypsum and the aluminum-based dot matrix material is prepared through an air-pressure seepage process. The aluminum-based dot matrix material can be in a pyramid type, a Kagome type and a grating type in the unit cell configuration. The invention also provides a sandwiched plate composite structure composed of the dot matrix material and a compact surface plate. The diameter of a unit cell bar is 0.5-5.0 mm, the length of the unit cell bar is 0.5-15.0 mm, and an included angle between the unit cell bar and a protective surface is 30-70 degrees. The compact surface plate is made from industrial pure aluminum, aluminum alloy, iron alloy or high-molecular materials. The dot matrix material with the industrial pure aluminum as the base body can reach higher than 5 MPa / g*cm<-3> in specific compressive strength.

Description

Technical field [0001] The invention relates to a design and preparation method of an aluminum-based lattice material based on 3D printing technology. Through computer design, a certain unit cell configuration and topological structure are obtained, and then a polymer lattice model is prepared using 3D printing technology, and then the gypsum slurry shell and air pressure infiltration method are used to obtain the complete structure of the polymer lattice model. Consistent aluminum-based (pure aluminum or aluminum alloy) lattice material. Background technique [0002] Lattice material is a kind of ordered porous material of space grid composed of nodes and connecting rod units. Compared with traditional metal foam and metal honeycomb materials, the lattice material based on light metal has higher specific strength, specific rigidity and energy absorption per unit mass, especially when the relative density is low, the lattice material has particularly With outstanding quality, e...

AI Technical Summary

Problems solved by technology

However, for light metals such as Al and Mg whose matrix materials are easily oxidized, direct 3D printing is likely to cause defects such as residual oxidation inclusions and gaps in the matrix, resulting in a decrease in its mechanical properties.

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