Silicon carbide (SiC) is a ceramic material with excellent physical and chemical properties. Its density is typically above 3.06 g/cm³, providing superior performance while maintaining a relatively low mass. Silicon carbide has an extremely high microhardness, generally ≥2300 kgf/mm², making it perform exceptionally well in high-wear environments and capable of withstanding significant abrasion and scratching.
Its bending strength is ≥350 MPa, demonstrating good mechanical strength and toughness, allowing it to endure substantial external forces without breaking. Silicon carbide has a melting point up to 2600°C (liquid), which enables it to maintain stable physical and chemical properties in high-temperature environments. It is suitable for use in high-temperature, high-pressure, and strong acid and alkali environments, and can withstand high-temperature oxidation and slurry waste, while remaining stable in high-temperature gases without erosion.
Silicon carbide is widely used in high-temperature operating environments, such as high-temperature furnace linings and spray equipment, due to its excellent melting point and high-temperature stability, making it a preferred material for such applications. Its high hardness also makes it suitable for high-pressure grinding and cutting applications, such as grinding wheels and cutting tools.
It can resist strong acids and alkalis, making it useful in the chemical industry for handling corrosive media and high-temperature gases, such as linings in acid-alkali reactors. In the nuclear industry, silicon carbide is used for seal armor, reactor linings, and other components because it can operate stably under extreme conditions. Additionally, silicon carbide is used in the manufacture of valve blocks, casting inner layers, pipe molds, and pump components, leveraging its excellent wear resistance and high-temperature stability.
