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Carbon fiber reinforced silicon carbide (C / SiC) ceramic matrix carbon composites (CMC), the silicon carbide ceramic matrix instead of the carbon matrix, because it has good oxidation resistance, high temperature thermal shock resistance, thermal conductivity and carbon fiber with good compatibility has become in the fields of aviation and aerospace very promising a new generation of high temperature structural materials. Now, there are different methods to prepare /SiC C ceramic matrix composites, such as hot pressing method (HP), chemical vapor infiltration method (CVI), liquid silicon infiltration method (LSI), precursor conversion method (PIP) and so on. Most of these methods can not be used to realize the low cost of ceramic matrix composites. The method of liquid silicon infiltration (LSI)…
In July 2012, scientists at the Keel University and the University of Hamburg, Germany, developed the Flying graphite The world's lightest material "flying graphite" (Aero graphite), its density is only 0.2 mg / cubic centimeter, replaced the air gel became the world's lightest material. Looks like a black opaque sponge, made up of 99.99% air. This new material has a stable performance, good electrical conductivity, ductility and very strong. It is composed of a porous carbon annotate in the nanometer and micron scale, which is composed of a mesh structure. Although its quality is very light, but the flexibility is very good, has a strong anti compression capacity and tension load. It can be compressed to 95%, and then restored…
Carbon carbon composite material due to its excellent thermodynamic properties has been widely used as solid rocket engine nozzle throat liner material, but graphite throat lining material due to the absence of carbon fiber reinforced, low strength, poor thermal shock resistance, low reliability; and multidimensional weaving and integrated felt carbon carbon throat lining, the complex production process, cycle is long, the production cost is higher. Acupuncture has no weft fabric preform due to its internal alternating vertical layer straight pull carbon fiber, greatly improve material X - Y to the mechanical properties of, by paving layer between carbon fiber net fetal Z to acupuncture, improves the strength between layers of materials. The forming process of carbon carbon composite material with…
