Laser 3D-printing silicon carbide ceramic-aluminum composite material and preparation method thereof

Abstract

The invention discloses a laser 3D-printing silicon carbide ceramic-aluminum composite material. The composite material is prepared from, by volume, 50%-75% of silicon carbide particles, 3%-10% of a binder and 15%-47% of an aluminum alloy matrix. The composite material is characterized in that a silicon carbide porous ceramic preform is formed through laser 3D-printing of the silicon carbide particles and the binder and is filled with an aluminum alloy; the particle size of the silicon carbide particles ranges from 10 [mu]m to 50 [mu]m; and the binder is aluminum powder with the particle sizeranging from 5 [mu]m to [40]mu m. According to the composite material, the porous ceramic preform is prepared with the selective laser sintering 3D-printing technology, the problems that traditional preparation methods are long in technological process, complex in procedure, high in cost and the like are solved, the internal structure of the material is uniform, the size precision of the materialis higher, and the structure stability and the performance reliability of the material are improved remarkably.

Description

technical field [0001] The invention relates to a silicon carbide ceramic-aluminum composite material and a preparation method thereof, in particular to a laser 3D printing silicon carbide ceramic-aluminum composite material and a preparation method thereof. Background technique [0002] Particle-reinforced aluminum matrix composites have been widely used in aerospace, high-speed rail, and precision instruments in recent years because of their large specific modulus, high specific strength, low thermal expansion coefficient, high thermal conductivity, electrical conductivity, wear resistance, and good fatigue resistance. , Electronic packaging and other fields. The performance of particle-reinforced aluminum matrix composites largely depends on its preparation process and method. At present, the preparation methods of aluminum matrix composites mainly include powder metallurgy, stirring casting method, melt infiltration method, etc., but the preparation methods of these meth...

AI Technical Summary

Problems solved by technology

[0007] To sum up, the current 3D printing of ceramic and metal composite materials is mainly through the preparation of ceramic powder or metal powder into slurry, and then printing out ceramic or metal blanks through 3D printing technology. The advantages of preparation cycle and reduced preparation cost, etc., but the material prepared by slurry 3D printing is relatively rough, the internal sintering of the material is not complete, and preparation defects are easy to remain, and the dimensional accuracy of the product is poor

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