Method for preparing continuous carbon fiber toughened ultrahigh-temperature ceramic-based composite material through electrophoretic deposition

Abstract

The invention belongs to the field of ultrahigh-temperature ceramic matrix composite materials, and particularly relates to a method for preparing a continuous carbon fiber toughened ultrahigh-temperature ceramic matrix composite material by electrophoretic deposition. The method comprises the following steps: preparing a polydopamine coating on carbon fibers; secondly, adsorbing polyethyleneimineon the surface of the ultrahigh-temperature ceramic powder and electrifying the ultrahigh-temperature ceramic powder; then, uniformly depositing charged ultrahigh-temperature ceramic powder on the carbon fiber containing the polydopamine coating through an electrophoretic deposition technology; and finally, carrying out hot pressed sintering to obtain the compact continuous carbon fiber toughenedultrahigh-temperature ceramic-based composite material. The preparation method has the effects and benefits that firstly, the ultrahigh-temperature ceramic powder is effectively introduced into the carbon fiber bundle so that the problem that the continuous carbon fiber toughened ultrahigh-temperature ceramic-based composite material is difficult to densify in preparation is solved; and secondly,chemical corrosion of the carbon fibers is avoided, matrix components are optimized, a good fiber-matrix interface is obtained, and the fracture resistance and the ultra-high temperature resistance of the composite material are improved.

Description

technical field [0001] The invention belongs to the field of ultra-high-temperature ceramic-based composite materials, and in particular relates to a method for preparing continuous carbon fiber toughened ultra-high-temperature ceramic-based composite materials by electrophoretic deposition. Background technique [0002] With the rapid development of aerospace technology, advanced technologies based on hypersonic missiles, transatmospheric vehicles, aerospace aircraft, etc. have gradually become a development trend. When flying at hypersonic speed, the aerodynamic heating will make the local surface temperature of the aircraft very high, especially the temperature of key parts such as the nose cone, wing leading edge, and fuselage belly of the aircraft will be as high as 2000 °C or more. Although traditional high-temperature-resistant materials (such as carbon fiber reinforced carbon matrix composites, carbon fiber toughened silicon carbide matrix composites, etc.) have exce...

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Problems solved by technology

[0007] The purpose of the present invention is to provide a method for preparing continuous carbon fiber toughened ultra-high temperature ceramic matrix composites by electrophoretic deposition, which aims to solve the problem of difficult preparation of continuous carbon fiber toughened ultrahigh temperature ceramic matrix composites and avoid the difficulty of fiber in the process of composite material preparation. Reactive erosion of the matrix phase and obtaining a good fiber-matrix bonding interface, thereby preparing carbon fiber toughened ultra-high temperature ceramic matrix composites with better fracture performance

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