Application situation Since the Ultra high power Graphite Electrode was discovered, countries all over the world attached great importance to it, conducted a lot of research, and developed the preparation process, characterization method and various detection methods of carbon / carbon composite materials. The carbon / carbon composite material is a composite material of carbon fiber reinforced carbon matrix. Although carbon / carbon composite materials have not been used as general industrial materials at present, their excellent performance will continue to expand their application range.

There are many coating process methods that have been developed, such as embedding conversion method, CVD method, sol-gel method, liquid phase infiltration method, liquid phase infiltration method, etc . Many thermosetting greases have a high carbon retention rate, such as phenolic resin, furan resin, polyimide, polyphenylene and polyphenylene oxide.

In view of the unique properties of this material, carbon / carbon composite materials have unparalleled advantages over other materials in high-temperature and long-life applications, and will be the most important trend for the development of high-temperature structural materials in the future. This technology can not only increase the residual carbon rate, reduce the pore size of the impregnable preform, but also effectively prevent the asphalt from being pyrolyzed by the gas generated by the pyrolysis of the gas pores, thereby greatly improving the densification efficiency.

The asphalt impregnation process is similar to the resin impregnation process, except that the asphalt needs to be vacuum-melted in the melting tank, and then the asphalt is injected from the melting tank into the impregnation tank for impregnation. The densification methods of carbon / carbon composite materials are mainly divided into two categories: the liquid-phase impregnation process of resin and asphalt and the gas-phase infiltration process (CVI) of hydrocarbon gas.0g / cm3), only 1/4 of nickel-based superalloys and 1/2 of ceramic materials. Studies have shown that the use of this process can greatly shorten the deposition cycle, showing a good application prospect. The basic theoretical issues related to carbon / carbon composite materials, such as interfacial bonding, fracture behavior, high temperature performance, etc. (1) The entire system is composed of carbon elements.

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