Preparation method of cracking carbon nanotube strengthened copper-based composite material

Abstract

The invention discloses a preparation method of a cracking carbon nanotube strengthened copper-based composite material. The preparation method comprises the following steps: dispersing carbon nanotubes into concentrated sulfuric acid, then adding concentrated phosphoric acid and potassium permanganate for magnetic stirring, cooling to room temperature after heating for heat preservation, then adding deionized water containing hydrogen peroxide in an ice-bath condition, obtaining a cracking carbon nanotube after cleaning, preparing the obtained cracking carbon nanotube and copper acetate intoa precursor in a solution, dropwise adding glucose and hydrazine hydrate under magnetic stirring, carrying out suction filtration, drying and annealing treatment to obtain composite powder, preparingthe composite powder into a block material through SPS sintering, and then obtaining the cracking carbon nanotube strengthened copper-based composite material through heat extrusion and annealing treatment. According to the preparation method, oxidative cracking treatment is carried out on the carbon nanotubes, the length-width ratio controllable cracking carbon nanotube is obtained, and the plasticity of the material can be considered while the strength of the composite material is improved, so that the composite material has good comprehensive mechanical property.

Description

technical field [0001] The invention relates to a method for preparing cracked carbon nanotube-reinforced copper-based composite materials, and belongs to the technical field of composite material preparation. Background technique [0002] Due to their unique physical and chemical properties, carbon nanotubes (CNTs) have attracted extensive attention from researchers as reinforcements of composite materials. However, due to the nanowire structure of carbon nanotubes (CNTs) and the chemical inertness of the surface, carbon nanotubes (CNTs) are very easy to agglomerate, especially when used as a reinforcement in composite materials, which often leads to poor performance of each part of the composite material. Uniform. During the load transfer process, only the outer layer of carbon nanotubes (CNTs) with defects plays a role of load transfer, and the inner layer is hardly utilized. Compared with carbon nanotubes (CNTs), the two-dimensional structure of graphene oxide (Graphen...

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Problems solved by technology

In the composite materials prepared by the above method, the strengthening efficiency of the reinforcement is still far from the theoretical value, which is due to the poor wettability of the carbon nanotubes (CNTs) and the metal matrix, so that the carbon nanotubes (CNTs) ) is difficult to disperse evenly in the metal matrix, so it is difficult to form a strong interface bond with the matrix, resulting in low strengthening efficiency, and the strengthening effect is much lower than theoretical prediction

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