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Carbon/carbon composites is reinforced by carbon fiber and matrix carbon in two parts, according to the carbon fiber in the matrix form of carbon can be divided into the following three types: The first: carbon fiber in the form of short fiber bundle randomly distributed in the matrix carbon. The second: carbon fiber with continuous filament woven cloth, then composite laminated plates of forms exist in the matrix carbon. The third: carbon fiber to between carbon cloth laminated plates and the transition between the two kinds of structure of 3 d braid structure, namely the form of a needled felt exist in the matrix carbon. Carbon matrix according to its source and form can be divided into liquid phase method…
Carbon carbon composite material for a series of unique mechanical, thermal and tribological system can replace the metal base composite material of a new generation of brake materials, its main characteristics are as follows: Density is small, the density of the material at about 1.8 g/cm3, is 1/3 to 1/4 of metal matrix composites. Using the materials of brake components, compared to about 40% weight loss. For military aircraft, the aircraft can be improved measure of payload and lighter; For commercial aircraft, lose weight 1 kg equivalent to 3000 litres of fuel savings annually. So the cost of its use effect is remarkable. Thermal stability is good, when to stop the plane take off, the surface temperature of the brake…
Research and development on the low carbon content graphite sheet is one area of graphite sealing material. Actually,to some instruments such as farm equipment , extensive chemical machinery,it’s no need to use the high carbon content flexible graphite sheet.it’s enough that If the sealing property could be better than the asbestine,and under this situation,it could reduce costs and selling price,and it also could promote the replace of flexible graphite sheet. As per the process flow: Expandable graphite > High temperature expansion > Pre press > Thermal treatment > molded press > Further repression,the expandable graphite could be process to the graphite sheet. According to the study showing that,the appropriate reduction of the carbon content could totally satisfied to the seal…
