A kind of carbon fiber reinforced porous composite material and preparation method thereof

Abstract

The invention discloses a carbon fiber-reinforced porous composite material and a preparation method thereof. The carbon fiber-reinforced porous composite material is characterized by consisting of a matrix, a carbon fiber reinforcing body and pores, wherein carbon fibers and glass fibers or quartz fibers are woven or laminated to form a fabric reinforcing structure; a carbon and silicon carbide composite material is synthesized through the chemical vapor deposition or liquid-phase dipping method; then, hydrofluoric acid solution is used for corroding the glass fibers in the composite material to obtain the carbon fiber-reinforced porous composite material. The carbon fiber-reinforced porous composite material has the following advantages: the carbon fiber-reinforced porous composite material can be used as a biological material skeleton; other biological substances of dielectric medium and the like can be transported in the composite material; water, liquid nitrogen or other liquid and gas can be introduced in the composite material for absorbing heat to reduce the temperature of the material.

Description

technical field The invention relates to a composite material and a preparation method thereof, in particular to a carbon fiber reinforced porous composite material and a preparation method thereof. technical background C / C composite material has high specific strength and specific modulus, and it can still maintain its high strength, friction performance and thermal shock resistance at high temperatures above 2000 ° C. It is the most promising high-temperature structural material. However, carbon starts to oxidize in an aerobic atmosphere at 370 °C and rapidly oxidizes above 500 °C, leading to catastrophic failure of C / C composites. The oxidation resistance temperature of C / C composites in air can be increased to 800°C by matrix modification, that is, adding various antioxidants to the C matrix. C / SiC composite materials have a series of excellent properties such as low density, high strength, high temperature resistance, ablation resistance and erosion resistance, and hav...

AI Technical Summary

Problems solved by technology

The purpose of the present invention is to overcome the weak defect of existing carbon fiber reinforced composite material and coating, and to provide a method that can effectively improve the bonding strength of carbon fiber reinforced composite material and coating