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The inner surface of the nozzle made of carbon carbon composite material is relatively uniform and smooth. no pit, which is beneficial to improve the efficiency of the nozzle, is generally considered to be the best material for the throat lining at present. In spite of the carbon carbon composite material has good thermal insulation, anti erosion and good machinability, but its production process is complex, high cost, ablation resistance as tungsten copper infiltrated materials. In order to increase of the ablated material ablation resistant ability, in the carbon carbon composite material nozzle ablation surface is coated with a layer of erosion resistant coating. In the carbon carbon composite material is coated on the surface of the dense tungsten coating,…
Carbon carbon composite materials with the unique properties of structural materials and functional materials, is widely used in aerospace and other fields, carbon / carbon composite materials, there is only one element, that is, the carbon element, carbon / carbon composites have many advantages, such as low density, and the actual density of carbon and graphite materials, which is about 2g/cm3. The function not only to meet the as a thermal conductivity material with high temperature resistance, high thermal conductivity coefficient characteristics, and as a friction material has the advantages of abrasion resistance, ablation resistance and other characteristics, at the same time as the structural materials must have high mechanical properties, including high specific strength, high specific modulus, brittleness and…
Carbon carbon composite material with low density, high specific strength, good friction and wear properties and excellent high temperature mechanics,performance, mainly used as aerospace high temperature structural materials. In recent years, it has been used to make artificial joints and other biological hard tissue substitute materials because of its high elastic modulus and good biocompatibility with human bone. With the increase of the density of the carbon / carbon composite, the density of the material increases gradually, and the porosity and densification efficiency decrease gradually. At the same time, the needle preform has a higher densification efficiency than the 3D Fine fabricated preform due to the presence of more impregnated diffusion channels, but the density of the final product is…
