Preparation method of reinforced magnesium matrix composite

Abstract

The invention provides a preparation method of a reinforced magnesium matrix composite and relates to an alloy which contains non-metal fibers or filaments and is manufactured through contact of fibers or filaments with molten metal. According to the preparation method, carbon nanotubes grow on nano silicon carbide particles in situ with a floating catalytic method, then carbon nanotube-silicon carbide in-situ composite reinforcement phases are prepared, and the carbon nano tube-silicon carbide hybrid reinforced magnesium matrix composite is prepared with a spark plasma sintering process on the basis of mechanical stirring and mixing of a liquid phase. The defects that an existing preparation method of a reinforced magnesium matrix composite has a poor carbon nanotube synthesis effect, structural damage is easily caused, the reinforcement effect is poor, reinforcement phases are non-uniformly distributed in a magnesium matrix, the reinforcement phases and the magnesium matrix have a poor interface reaction easily, carbon nanotube-aluminum oxide composite reinforcement phases have poor structural design and are not suitable for serving as reinforcement phases of the magnesium matrix composite, and the mechanical performance of the prepared magnesium matrix composite is non-ideal are overcome.

Description

technical field [0001] The technical solution of the invention relates to the manufacture of an alloy containing non-metallic fibers or filaments by contacting the fibers or filaments with molten metal, specifically a method for preparing reinforced magnesium-based composite materials. Background technique [0002] Magnesium-based composites are metal-based composites that use magnesium or magnesium alloys as the matrix material and particles, whiskers or fibers as the reinforcing phase. Magnesium-based composites inherit the advantages of low density, good vibration damping, good damping and machinability of pure magnesium, overcome the shortcomings of low hardness and unstable chemical properties of pure magnesium, and have good thermal stability, high specific modulus and Excellent performance of high specific stiffness. Therefore, as a new type of metal matrix composite material with excellent comprehensive performance, magnesium matrix composite material has great appl...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for preparing a reinforced magnesium-based composite material, which is a method of in-situ growing carbon nanotubes on nano-silicon carbide particles to prepare carbon nanotube-silicon carbide in-situ composites. Reinforcement phase, on the basis of liquid-phase mechanical stirring and mixing, the method of preparing carbon nanotube-silicon carbide hybrid reinforced magnesium-based composite materials by spark plasma sintering process overcomes the existing shortcomings of the existing preparation methods of reinforced magnesium-based composite materials The synthesis effect of carbon nanotubes is poor, prone to structural damage and poor reinforcement effect, the reinforcement phase is unevenly distributed in the magnesium matrix, the reinforcement phase-magnesium matrix is ​​prone to adverse interface reactions, and the structure design of the carbon nanotube-alumina composite reinforcement phase is not good. It is not suitable as a reinforcing phase of magnesium-based composites, and the mechanical properties of the prepared magnesium-based composites are not ideal.

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