Preparation method of enhanced metal-matrix composite material

Abstract

The invention discloses a preparation method of an enhanced metal-matrix composite material. The preparation method comprises the following steps that S1, the surfaces of nanoparticles are coated withmagnesium nitride in an evaporated mode; S2, metal raw materials are taken to be put into a medium-frequency induction furnace for alloy smelting; S3, the coated nanoparticles are loaded into a powder storage tank; S4, high-pressure gas is opened, airflow passes through the powder storage tank to carry the nanoparticles so as to form solid phase flow and gas phase flow; and S5, after the high-pressure gas phase flow and the high-pressure solid phase flow pass through an atomizer, molten metal liquid flow is broken; and S6, prepared powder particles are collected in a collector. The surfaces of nanoparticles are coated with generated magnesium oxide in an evaporated mode in the preparation process, thus the wettability of enhanced body particles and matrix melt can be improved significantly, and the adverse reaction between the particles and the outside world can be avoided through a magnesium oxide film; and metal droplets and the pretreated nanoparticles are subjected to complex andintense energy exchanging, thus the overall uniformity of enhanced combination is promoted, and relative to combination of solid phase particles, the preparation method is quicker in combination and facilitates scale production.

Description

technical field [0001] The invention relates to the field of metal matrix composite materials, in particular to a preparation method of reinforced metal matrix composite materials. Background technique [0002] Metal matrix composite (MMC) is a composite material that is artificially combined with metal and its alloys as the matrix and one or several metal or non-metal reinforcements. Most of its reinforcing materials are inorganic non-metals, such as ceramics, carbon, graphite and boron, etc., and metal wires can also be used. Together with polymer matrix composites, ceramic matrix composites and carbon / carbon composites, it forms a modern composite system. Compared with traditional matrix alloys, composite materials have the characteristics of high specific strength and specific stiffness, excellent high-temperature mechanical properties, and good wear resistance. They have very broad application prospects in aerospace, automotive, electronics, and transportation industri...

AI Technical Summary

Problems solved by technology

[0007] S1: Preprocessing of particles: Evaporating magnesium nitride film on the surface of nanoparticles can significantly increase the wettability of nanoparticles and metal solution. The magnesium oxide film can avoid the adverse interface reaction of nanoparticles and overcome the vacuum pressure infiltration process. Disadvantages such as complexity, high cost, and high chemical treatment temperature;