Method for preparing porous metal foam in 3D printing mode and printing device

Abstract

The invention relates to the technical field of metal foam (namely foamed metal, metal sponge and porous metal) preparation, in particular to a method for preparing the porous metal foam in a 3D printing mode and a 3D printing device. The method comprises the steps that firstly, metal powder, an adhesive and a filling agent are evenly mixed, and a raw material suitable for 3D printing is obtained; secondly, a three-dimensional structural drawing of a product is drawn, outline data is obtained, and the outline data is subjected to filling processing so as to generate a scanning path; thirdly, the 3D printing device is started for processing, and the designed product is obtained. The raw material comprises the metal powder and the adhesive, in the laying and sintering process, the adhesive is subjected to gasification or sublimation or solid solution or decomposition, and the porous metal foam different in mean pore size is obtained through the particle size of the metal powder, the type and quantity of the adhesive and the adhesive-metal powder interaction. The method has the advantages that the metal foam in any shape and size can be prepared, the processing method is simple, the cost is low, and the pore size and the porosity which can reach a nanometer level are controllable; and the method and the 3D printing method are widely suitable for various metals and alloy materials.

Description

technical field [0001] The invention relates to the technical field of preparation of metal foam (also known as metal foam, metal sponge, porous metal), and in particular to a method and 3D printing equipment for preparing porous metal foam by 3D printing. Background technique [0002] Metal foam (also known as foam metal, metal sponge, porous metal) refers to a special metal material containing foam pores. It is a new type of functional material with many pores in its internal structure, which is in the form of a skeleton structure or a honeycomb structure. Its characteristics and uses are closely related to the high porosity of the material, and a variety of metals or alloys can be made into metal foams. Metal foam has a series of good advantages such as small density, high porosity, large specific surface area, good heat insulation performance, good sound insulation performance, and the ability to absorb electromagnetic waves. It is often used in electronics, communicatio...

AI Technical Summary

Problems solved by technology

Generally speaking, the foaming method is complex and difficult to control; the casting method is only suitable for metals and alloys with low melting points; the sintering method is difficult to control the pore size and porosity; the metal foam prepared by the metal deposition method has high porosity and uniformity. However, the process is cumbersome and the preparation cost is high; the sputtering method has high preparation cost and limited materials

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