Silicon carbide whiskers is a little flawed, there is a certain aspect ratio of single crystal fibers, it has a very good temperature resistance and high strength. Mainly used for applications requiring high temperature high-strength material toughening occasions. Such as: aerospace materials, high-speed cutting tool. Currently, with high cost performance.
Silicon carbide whisker belong to a diamond crystal, is now synthesized whiskers highest hardness, modulus maximum, maximum tensile strength, heat resistance temperature of the highest whiskers products, divided the α type and β type two forms, which is superior to α-type β-type and has a higher hardness (Mohs hardness of 9.5 and above), better toughness and conductivity, wear resistance, high temperature, particularly resistant to earthquake , corrosion resistance, radiation has been applied on and engine, high-temperature turbine rotor, special parts on aircraft, missiles shell.
Silicon carbide whiskers is a little flawed, there is a certain aspect ratio of single crystal fibers, it has a very good temperature resistance and high strength. Mainly used for applications requiring high temperature high-strength material toughening occasions. Such as: aerospace materials, high-speed cutting tool. Currently, with high cost performance.
Cubic silicon carbide whisker whiskers, and belong to a diamond crystal, is now synthesized whiskers highest hardness, modulus maximum, maximum tensile strength, heat resistance temperature of the highest whiskers products, divided the α type and β type in two forms, including β-type performance than α type. β type than the α type having a higher hardness (Mohs hardness of 9.5 and above), better toughness and conductivity, wear resistance, high temperature, especially earthquake-resistant, corrosion-resistant, resistant to radiation, have housing in aircraft, missiles on and engine, high-temperature turbine rotor, has been applied on special parts.
Silicon carbide is extremely anisotropic crystal growth is achieved by a catalyst on the basis of silicon carbide particles on the surface along the crystal growth of the short fibers, there are two main methods currently producing a gas phase reaction method and a solid material, which method is more solid material It is economical and suitable for industrial production.
Japan and the United States show the synthesis of silicon carbide of a high enthusiasm, in terms of reducing costs and improving the quality of work done a lot of research. Ramsey and other American to amorphous silica as silicon source rice husk species (obtained from burning carbonized rice husk), were mixed in pulverized petroleum coke carbonized rice husk and powder sintering to produce a silicon carbide products. Japan Tanaka and other acid-boiled rice husk, cleaning, carbonation, sintering and other steps to obtain high-purity silicon carbide products.
The first production of silicon carbide whiskers of manufacturers, production of silicon carbide whiskers is a high strength beard shape (one-dimensional) single crystal, high strength, high modulus, and many other excellent mechanical properties, it is widely used in metal matrix, ceramic matrix composite. Mainly used in ceramic cutting tools, high temperature components in the field of aerospace, main bearing strong, large mud pumps, etc. Add to this new material has obtained a more excellent high temperature components, wear resistance, widely used as a structural material in aviation, aerospace, automotive, machinery, petrochemical and other, known as the king of whiskers said. In particular, it has a special significance in the automotive, aerospace engines, housing and so on.
In addition, it was added as an enhanced component plastic matrix, metal matrix or ceramic matrix and play a role in enhancing toughening, high thermal conductivity Sic use of nano materials, high insulation resistance, as large scale integrated circuit substrates in the electronics industry and packaging materials. As an optical material information in the television show, fields of modern communications and the Internet with a high value.
Silicon carbide whiskers in the manufacture of high-strength plastic, metal and ceramic applications work, you can speed up the upgrading of key traditional products. As the nano-silicon carbide whiskers of outstanding features, it has a special role in the aerospace industry industry sectors, namely in aircraft, missile applications and engine housing, the high temperature turbine rotor, special components, military industry and so it huge demand for civilian industry.
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