Preparation method of three-dimensional double-connected structure composite material based on additive manufacturing

Abstract

The invention relates to the technical field of composite material preparation, in particular to a preparation method of a three-dimensional double-connected structure composite material based on additive manufacturing. The three-dimensional double-connected structure composite material comprises a reinforced phase network skeleton and a matrix filling skeleton, wherein the reinforced phase network skeleton is constructed by reinforced phase rods; the method comprises the following steps: firstly, designing a reinforced phase spatial form, a volume ratio, a reinforced phase rod diameter and a reinforced phase rod cross section shape, and constructing a reinforced phase network skeleton and a matrix filling skeleton; then preparing a reinforced phase network skeleton by using a selective laser melting method, then filling matrix powder, compacting and sintering to obtain the three-dimensional double-connected structure composite material, according to the composite material preparation method based on additive manufacturing, high designability and customization of a 3D reinforced framework are achieved, and a compact defect-free three-dimensional double-communication structure composite material is prepared in combination with a subsequent sintering process.

Description

technical field [0001] The invention relates to the technical field of composite material preparation, and specifically designs a method for preparing a three-dimensional double-connected structure composite material based on additive manufacturing. Background technique [0002] Additive Manufacturing (AM) technology is based on the discrete-accumulation principle, using layered slicing software to slice, scan and fill the model of the part to be formed, and the powder or wire is controlled by the numerical control system to melt, solidify and Accumulate layer by layer, and finally complete the rapid prototyping of parts. Forming materials based on laser technology include metals, non-metals, composite materials, biological materials and even life materials, and laser and powder-based additive manufacturing technologies have formed two typical forming processes, laser deposition technology (Laser Deposition Manufacturing, LMD) Synchronous powder-feeding laser deposition man...

AI Technical Summary

Problems solved by technology

Taking nickel metal foam and silicon carbide ceramic foam as examples, they are composed of cells and struts, forming a three-dimensional network structure macroscopically, but the size, shape and distribution of the cell body and the thickness and length of the struts are random. In addition to the influence of the shape and size of the porogen particles, it is also affected by the sintering temperature, which will lead to the limitation of the permeability and strength of the foam during subsequent processing, and is not reliable

At present, there is no technology that can directly design the 3D distribution of reinforcements to achieve three-dimensional structure reinforced / toughened composites

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