Carbon fiber and metal composite structure and preparation method thereof

Abstract

The invention discloses a preparation method of a carbon fiber and metal composite structure, which comprises the following steps: 1. carrying out shot blasting or shot penning treatment on the bonding surface of metal at least once to form roughened metal; 2, spraying an acetone resin solution on the surface of the rough metal, and carrying out pretreatment; 3, coating the surface of the pretreated rough metal with a binder; 4, carrying out infiltration treatment on an aramid short fiber film by using an acetone resin solution, and placing the aramid short fiber film on the rough metal surface; and 5, carrying out infiltration treatment on carbon fiber cloth by using an acetone resin solution, coating the surface of the carbon fiber cloth with a binder, covering the rough metal surface treated in the step 4 with the carbon fiber cloth, and carrying out static pressing until the carbon fiber and metal composite structure is cured and molded. Joint reinforcement of two interface layersbetween metal and a binder and between carbon fibers and the binder and a binder layer is realized.

Description

technical field [0001] The invention belongs to the field of composite materials, and relates to a carbon fiber and metal composite structure and a preparation method thereof. Background technique [0002] Due to its high strength, uniform material, stable quality, good plasticity and toughness, easy construction and easy maintenance, metal structures are more and more used in various fields. Carbon Fiber Reinforced Polymer, referred to as CFRP, not only has the advantages of high strength, high elastic modulus, light weight, strong corrosion resistance, good fatigue performance and good shock absorption performance, but also can maximize the self-weight of reinforced components. The carbon fiber-metal composite structure has been widely used in civil engineering, aviation, aerospace, automobile, petroleum industry and other fields without substantial increase, cross-sectional size and appearance of reinforced components will not change significantly. [0003] In order to i...

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Problems solved by technology

Due to the high viscosity and insufficient fluidity of the adhesive, the adhesive cannot completely penetrate into the inside of the aramid fiber and the very small pits or gaps on the metal surface, and pores will be formed in the adhesive layer and the inside of the aramid fiber. There are gaps on the metal surface, and the adhesive is brittle after curing and is sensitive to defects. Therefore, these gaps and pores will reduce the bonding strength of the carbon fiber and metal composite structure

If the metal surface is sandblasted, since the diameter of the aramid fiber is basically the same as the size of the pit on the sandblasted metal surface, the number of aramid fibers embedded in the rough metal surface is limited, which will directly affect the aramid fiber reinforced carbon fiber and metal composite structure Enhanced effect of

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