Graphene/aluminum-matrix composite for high-speed impact resistance and preparation method thereof

Abstract

The invention relates to a graphene / aluminum-matrix composite for high-speed impact resistance and a preparation method thereof, and aims to solve the problem that graphene is poor in dispersity in metal powder, the problem that graphene / aluminum composites prepared with the powder metallurgy method are insufficient in interface bonding strength and the problem about arrangement of graphene in as-cast and as-extruded graphene / aluminum composites. The graphene / aluminum-matrix composite is prepared from a reinforcement body and an aluminum matrix; and the mass fraction of the reinforcement bodyin the composite ranges from 0.15% to 3.0%. The method includes the following steps that I, weighing is performed; II, ball-milling is performed; III, preform is prepared through cold pressing; IV, pressure infiltration, hot extrusion forming and hot rolling forming are performed. The prepared graphene / aluminum-matrix composite for high-speed impact resistance is good in mechanical property, excellent in elasticity modulus, high in graphene / aluminum interface bonding strength, capable of realizing directional arrangement of graphene and excellent in high-speed impact performance. The inventionis used for preparing the graphene / aluminum-matrix composite for high-speed impact resistance.

Description

technical field [0001] The invention relates to a graphene aluminum-based composite material for high-speed impact resistance and a preparation method thereof. Background technique [0002] With the increasing exploration of the space environment, there are more and more studies on the high-speed impact performance of materials, among which there are many studies on high-speed impact with high strain rates. Currently B 4 C. Al 2 o 3 and TiB 2 Particle-reinforced aluminum matrix composites have been widely used in space debris high-speed impact materials, but with the development of new carbon materials such as graphene, especially the high in-plane Young's modulus (>1TPa) of graphene, is relatively low Density (2.2g·cm -3 ), so that the in-plane stress propagation velocity of graphene is very high (22.2km s -1 ), the research shows that under the dynamic condition of high strain rate, the local stress generated by the inertial effect becomes very obvious, and the ad...

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Problems solved by technology

[0007] The present invention aims to solve the poor dispersion of graphene in metal powder; the preparation of graphene / aluminum composite material by powder metallurgy method, the interface bonding strength is not enough; the problem of graphene arrangement in cast and extruded graphene-aluminum composite materials , and provide a graphene-aluminum matrix composite material for high-speed impact resistance and a preparation method thereof

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