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The ablation of carbon carbon composite material throat is mainly from complex gas environment,and the main reason includes: carbon sublimation, surface chemical reaction, mechanical erosion,and the fiber properties, prefabricated structure,material density, porosity, matrix carbon, degree of graphite, impurity,and there are some factors that affect the interaction. Carbon carbon composite material has many good properties,such as high specific strength, high specific modulus, high temperature resistance, corrosion resistance, thermal shock resistance,and chemical stability. Now the carbon carbon composite material is double functional composite material with structure material and thermal protection materials,and it’s already widely used in aerospace industry and other industrial system. Carbon carbon composite material now is the preferred material for nozzle throat. During the working state,the carbon carbon nozzle throat…
Guide with new type of knitting process can be enhanced by carbon fiber knitted fabric, the fabric is woven from a carbon fiber filament continuous, it can replace mutual enhancement or woven fabric reinforced material, and the knitting technology can provide can be formed and costs are relatively cheap products. Reinforcing knitted fabric from the matrix resin and any limitations of presoak process, a certain stability, fiber distribution can be obtained the permanent and certain tensile properties of the composites, the composite material due to the organizational structure of reinforced material apparent anisotropy, but its space deformation may be woven or orientation enhanced composite materials, the stereo configuration of the knitting knitting circle more effectively prevent the up layer phenomena…
Graphite (siliconized) is a kind of composite material which is made of silicon carbide coating on the surface of graphite material. The hardness of silicon carbide is the hardness of SiC, it is only after diamond, boron nitride, boron carbide, the hardness is higher than that of tungsten carbide, three aluminum oxide, two. Silicified graphite used as phosphoric acid, hydrofluoric acid and amine and phosphorus bearing pump. In addition, the semiconductor industry, as silicon epitaxial growth of the heating sheet matrix and fixture and manufacture of artificial joint, artificial heart valve, artificial root and so on There are three methods to make the production of siliconized graphite : chemical vapor deposition (CVD), Chemical vapor reaction method (CVR), and liquid silicon…
