Preparation method of graphene-modified c/sic heat-proof composite material

Abstract

The invention discloses a preparation method of a graphene modified C / SiC composite ceramic material. According to the method, through the steps of carbon fiber fabric cleaning, graphene dispersion solution preparation, graphene modified boron phenolic resin solution preparation, prefabricated element preparation, graphene modification precursor solution preparation, precursor solution impregnation, curing, high-temperature cracking and C / SiC composite material blank mechanical processing preparation, the graphene modified C / SiC heat-proof composite material product is obtained. The characteristics of high-intensity feature, high specific surface area and the like of the graphene are utilized; the modification reinforcement of the graphene on the C / SiC composite material at the molecular level can be realized; the microcosmic interface performance of the C / SiC composite material can be obviously improved, so that the mechanical property and the ablation-resistant performance of the C / SiC can be improved.

Description

technical field [0001] The invention relates to the technical field of ceramic-based heat-resistant composite materials, in particular to a preparation method of graphene-modified C / SiC heat-resistant composite materials. The material can be used for anti-ablation and heat-resistant parts such as missile body heat-proof materials, engine after-combustion chamber heat-proof materials, air rudders, and front wings. Background technique [0002] C / SiC composite materials are widely used as thermal protection materials in aviation, aerospace, nuclear power and other fields due to their excellent properties such as high specific strength, high specific modulus, high hardness, high temperature resistance, ablation resistance, and thermal shock resistance. Especially in the front wing of the aerospace vehicle, the thermal protection of the afterburner of the solid impulse engine, and the special parts with high temperature resistance, ablation resistance, and erosion resistance of ...

AI Technical Summary

Problems solved by technology

[0003] At present, C / SiC composite materials are mostly prepared by precursor impregnation-cracking process, which has the characteristics of designability of material shape and structure, high strength retention rate of fibers, etc., but there are also problems such as slow densification process, long preparation cycle, and high cost. Disadvantages, to a certain extent, restrict its wide citation

However, the densification degree of the C / SiC composite material prepared in a short cycle is not enough, resulting in a decline in its mechanical properties. Therefore, how to ensure the mechanical properties of the material on the premise of shortening the cycle and reducing costs has become a major difficulty.