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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…
Graphite crucible - maintaining 1, specifications that copper crucible capacity (#/ kg) 2, the graphite crucible to prevent wet storage must be kept in a dry place or the gallows. 3, when moving gently, it is strictly prohibited earthquake. 4, before the use of the drying equipment or furnace hot baking, temperature rise to 500 degrees Celsius. 5, should be placed in the mouth below the surface of the crucible furnace crucible is cover wear prevention. 6, feeding should be based on the crucible dissolution, can not be added too much, too tight to prevent tightening crucible. 7, out of things and to comply with the shape of crucible clamp, clamp the central prevention department stress damage of crucible. 8,…
The development of semiconductor and the application of graphite materials in the semiconductor industry are inseparable. In the semiconductor industry, a large number of high purity graphite materials are used in the heating system of the single crystal furnace. In the semiconductor wafer processing (including the zone melting, epitaxy, contour processing, etc.) the graphite materials are the auxiliary tool, parts, in the production of polysilicon materials used in the semiconductor silicon wafer as an auxiliary tool, parts. Graphite products for electronic engineering, first of all, to achieve the application in the semiconductor industry. Entering the 21st century, photovoltaic industry has been rapid development, the polysilicon ingot material used in solar battery appeared rapid increase on the yield and market ,…
