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Carbon carbon composite material has the similar properties as the graphite material,such as low density,high-thermal resistance,ablation resistance,high strength,good thermal shock resistance and easy designed etc. meanwhile it also has some other properties which graphite material doesn’t have,such as brittleness of polycrystalline graphite,and the easy layering property of the pyrolytic graphite. Now the carbon carbon composite material is the most appropriate material used for the throat,nozzle of the rocket engine. The carbon carbon composite material consists of two parts: carbon fiber perform and the carbon matrix. The structure of material decides the property of it. To the C/C composite material,as for the anisotropy,the structure and the performance of the material is very complex. The property of carbon carbon composite material is…
The bearing is a sliding parts commonly used in machinery industry, material and metal, nonmetal, composite materials don't. Graphite bearing is the performance requirements of the mechanical equipment, in the metal bearing on the basis of the development and development of carbon bearings, graphite materials as the main substrate. Graphite bearing is different from the metal bearing characteristics, mainly in: self lubrication, high temperature resistance, corrosion resistance, light weight, etc.. Bearings are rolling bearings and plain bearings, and graphite bearings are used for sliding bearings. Used in food, beverage, textile, chemical and other industrial sectors of transport, dryers, textile machines, submersible pump motors and other bearings, such as the use of grease lubricant inevitably lead to pollution, and graphite bearing…
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…
