Preparation device and preparation method of metallic aluminum coating on surface of carbon fiber

Abstract

The invention discloses a preparation device and a preparation method of a metallic aluminum coating on the surface of a carbon fiber. The device comprises a molding device for molding an aluminum coating on the surface of the carbon fiber, wherein a cooling device for cooling the carbon fiber coated with the aluminum coating is arranged at the lower side of the molding device; a collection device for collecting the carbon fiber coated with the n aluminum coating is arranged at the lower side of the cooling device; the molding device comprises a melt tank and a thermal insulation plate; a plurality of axial through holes through which the carbon fiber passes are uniformly formed in the side wall of the melt tank; a discharge hole is arranged between the axial through holes and the inside of the melt tank; an overflow opening is arranged between the axial through hole and the melt tank; and a feeding hole and a pressurizing hole are formed in the top of the melt tank. Fast and continuous preparation of the aluminum coating on the surface of the carbon fiber can be achieved by controlling the drawing rate of the fiber and the extrusion pressure of molten aluminum; the contact time of the carbon fiber and the molten aluminum is shortened; and reduction of the mechanical property of the carbon fiber is effectively prevented.

Description

technical field [0001] The invention belongs to the technical field of surface coating preparation devices, and in particular relates to a preparation device and method for a metal aluminum coating on the surface of carbon fibers. Background technique [0002] Carbon fiber is a new type of fiber material with low density, high strength and high modulus ratio with a carbon content of more than 95%. It has good wear resistance, heat resistance, electrical conductivity, lubricity and acid and alkali resistance. It is a kind of reinforcement material with great development potential and broad application prospect. Its composite materials are widely used in aerospace, mechanical engineering and bioceramics and other fields. However, when carbon fiber is used to reinforce metal matrix composites, its application is limited due to the poor wettability and chemical compatibility between the fiber and the matrix metal. Therefore, in order to improve the bonding performance between ...

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Problems solved by technology

Among them, the equipment required for physical and chemical vapor deposition is expensive, the operation is complicated, the coating preparation time is long, and the energy consumption is large, while the electroplating and chemical plating methods have strict requirements on the activity of the coated metal, especially on the surface of carbon fiber. When preparing metal aluminum coatings, electroplating and electroless plating methods cannot effectively solve the following problems: 1) When preparing aluminum coatings, the substrate needs to be immersed in high-temperature molten salt for a long time, which will greatly damage the mechanical properties of carbon fibers; 2) Aluminum coatings It is difficult to effectively control the thickness and uniformity of the layer; 3) It is impossible to realize the continuous preparation of aluminum coating on the surface of carbon fiber

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