News
China is the world's leading graphite producing areas, it has the most variety of graphite in the world ,and the production quantity accounted for more than 70% of the world's graphite production. There are 3 main types of graphite in China, namely natural flake graphite, amorphous graphite and artificial graphite. Chinese flake graphite is very famous in the world with more reserves and big production and export volume. The flake graphite was characterized as hexagonal crystal structure, which was in layered structure distribution .The production areas of natural flake graphite mainly concentrated in Jixi, Luobei, Mishan and Muling of Heilongjiang Province, Pingdu, Laixi, Nanshu and Beishu of Shandong Province,Xinghe, Wuchuan and Hohhot of Inner Mongolia. The natural flake graphite production…
The density of carbon carbon composite material can be adjust between 1.3~2.0g/m3,and it can be widely used for any parts of the nozzle. According to the different ablation environment,the middle and high density carbon carbon composite material can be used for the throat part,the low density C/C composite material can be used for the back expansion part and the middle and low density material can be used for the front expansion part and the head. In addition,the screw,pin which are also made from the carbon carbon composite material can be used in the nozzle,and the function is connection. The carbon carbon composite material nozzle and expansion part was widely used in the SRM since 1990s, multilevel SRM, strategic missile SRM,rocket…
As the high tempterature and complexity of the throat environment and the polytrope during the ablation process,the carbon carbon composite material throat also show a complex process,and there are many effects of different degrees from the carbon fiber micro complexity,different technology etc. The type and quality of the carbon fiber has a big influence to the strength and ablation properties of the carbon carbon composite material. There are many different carbon fiber,like PAN base carbon fiber,pitch base carbon fiber,and rayon base carbon fiber,and each kind of the carbon fiber can be divided into many series. The carbon carbon composite material is mainly desined according to the purpose and working environment,the main properties include strength, modulus,thermal property etc. Generally speaking,the high…
