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Carbon carbon composite material is a new type of high temperature material, with light weight, high modulus, high specific strength, low thermal expansion coefficient, high temperature resistance, heat shock resistance, corrosion resistance, good vibration absorption and so on. In the application, as an anti ablation, short time use of the material, carbon carbon composites have been successfully applied in the aerospace industry, such as rocket engine exhaust nozzle, throat lining, aerospace aircraft wing leading edge and so on. In the field of aerospace applications, the most successful example when the number of carbon carbon composite material brake disc, in this area has formed a mature market. Carbon carbon composite brake disk advantages mainly due to its own density, high temperature…
High purity graphite is a graphite with a carbon content of more than 99.99%. High purity graphite with high temperature resistance, corrosion resistance, thermal shock resistance, thermal expansion coefficient is small, self lubrication, resistance coefficient is small and easy to processing machinery, and other advantages, is widely used in metallurgical, mechanical, environmental, chemical, electronic, medical, military and aerospace fields, the position in the national economy is becoming more and more important, especially in the solar photovoltaic industry. The global photovoltaic industry average annual growth rate of 40%, China as the world's largest producer of solar photovoltaic, 70% of its share to the global, high-grade graphite materials consumed by the industry in 2011 reached 2.3 million T to expected future photovoltaic…
One way to decrease the ablation property of the carbon carbon composite material is add the coating which can be antioxidant and anti-scouring during the high temperature. Now the recognized method in the international community is HfC,TaC,ZrC and SiC etc. The technology mainly include CVI/CVD,CVR, liquid phase impregnation and coating. The C/C composite material throat made in Russia,using the Hf and Ta to dip into it,which can bear the 3800 centigrade and meet 8.0Mpa pressure,the ablation property is much lower than the normal carbon carbon composite throat. The SiC coating C/C composite material can be made from two different kinds of the composite material matrix,one is needle felt reinforced material,using the CVD to densify to 1.3g/cm3 then using resin impregnant…
