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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…
1、Determination of temperature in the process of graphitization The temperature of carbon carbon composite material graphitization is one of the most important index during the processing. For a long time,it is basically determined by experience. In the old days,people think the temperature is the higher the better,but it’s wrong. To any carbon composite material,there is always a ideal temperature,to the resin carbon,the best temperature is 2480℃,as for the CVD carbon,pitch carbon and mixed matrix carbon,the ideal temperature is influence by the relative content,mix form and the different type and property of the carbon fiber,and the application is also need to be considered. Usually, the resin carbon can be partly graphitized at about 2500℃,as for the pitch carbon,it’s easily to be…
