A kind of rapid preparation method of c/c composite material

Abstract

The invention discloses a rapid preparation method of a C / C composite material, which belongs to the technical field of material preparation. The method comprises the following steps: 1) preparation of a preform; 2) heat treatment of the preform; 3) preparation of a water-based graphite slurry ; 4) Graphite slurry injection; 5) Graphite slurry refilling; 6) Preparation of biscuit; 7) Carbonization treatment; One or more combinations of C / C porous preforms are densified. The invention adopts the method of slurry injection, and uniformly introduces graphite powder without destroying the bonding strength of the carbon fiber prefabricated body. On the one hand, it ensures the strength and uniformity of the material body, and on the other hand, it greatly shortens the later densification time. , which reduces the cost and is suitable for industrial production; the use of water-based graphite slurry has low cost and no pollution; the C / C composite material prepared by this method has high strength, good wear resistance, and reliable high-temperature performance.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and in particular relates to a rapid preparation method of a C / C composite material. Background technique [0002] C / C composite material, that is, carbon fiber reinforced carbon matrix composite material, is a typical high-tech material, with carbon fiber as reinforcement and carbonaceous material as matrix, and has the advantages of both carbon material and fiber reinforced composite material. C / C composite materials have a series of excellent properties such as low density, high specific modulus, high specific strength, low thermal expansion coefficient, high temperature resistance, corrosion resistance and wear resistance, and have been widely used in aerospace, aviation, nuclear energy, chemical industry, machinery and other fields. However, the problems of long preparation period, high cost, complicated manufacturing process and high technical difficulty of C / C composite mater...

AI Technical Summary

Problems solved by technology

But in fact, this method still uses long-term CVI and repeated impregnation carbonization to prepare C / C composite materials, which takes about several hundred hours, and does not fundamentally solve the problem of long period in the preparation process. Because of this, larger parts cannot usually be fabricated

[0005] Chinese patent CN 104649701B discloses a method for the preparation of high-strength lightweight carbon / carbon composites, which utilizes pretreated continuous filament carbon fiber winding to make preforms of highly oriented conical C / C composites body, then vacuum impregnation, pressurized carbonization, and then chemical vapor deposition CVD, graphitization, impregnation, and CVD to obtain high-strength and lightweight C / C composite materials, but the subsequent densification procedures are complicated, time-consuming, and costly.

Although the above two methods shorten the preparation cycle, they are poor in the controllability of the material structure, and have high requirements for grouting equipment and molds. Different molds are required to prepare materials of different specifications, which is not conducive to the diversified production of products.

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