Silicon carbide is a kind of inorganic non-metallic materials, with excellent mechanical strength and hardness, small creep deformation, good oxidation resistance, good corrosion resistance and good wear resistance, it is an ideal choice for high temperature engineering materials. Due to the outstanding properties, silicon carbide ceramic is also recognized as a mechanical sealing ring material better than metals, tungsten carbide, al2o3 ceramics and more. Moreover, it also has advantages of self-lubricating properties and low friction coefficient.
Kinds of Grade:
Various kinds of wear parts made in silicon carbide (SiC). Such as, seal faces, bushing/sleeves, spray nozzles ad more. Different grades of silicon Carbide are available as following:
• Reaction bonded silicon carbide (RB SiC)-a very economical material which gives excellent wear characteristics, as well as good chemical resistance.
• Sintered silicon carbide (SSiC)-the absence of free silicon makes it most resistant to chemically-aggressive fluids, and ideal for high temperature applications.
• Graphite-loaded silicon carbide-this is a composite of silicon carbide and free graphite. Graphite is added to RB SiC (RB SiC + C) or SSiC (SSiC + C), to improve tribological behavior by enhanced lubricity.
|Main Performance Index of Sintered Reaction Silicon Carbide|
|Item||Units||Reaction sintered SiC(SiSIC)||Pressureless sintered SiC(SSIC)|
|Coefficient of Heat Expansion||J/oC||4.3x10-6||4.02x10-6|
|Sintered Silicon Carbide (S-SiC) main applications|
|High temperature, hydraulics, grindings||Nozzles, spindle seals, bearings, glove valves, valve plates||Anti-wear, anti-heat|
|Chemical||Strong acid or alkali||Spindle seals, bearings, pump parts, heat exchanger tubes||Anti-wear, anti-corrosion, airtight|
|High-temperature oxidation||Steam channels, thermocouple sleeves||Anti-heat, anti-oxidation|
|Mechanical||Engines||Nozzles, turbine blades, rotors,?burner parts||Anti-heat-shock, anti-wear, anti-heat|
|Grindings||Sand-blasting nozzles, inner liners||Anti-wear|
|Ordinary industries||Pulp waste liquid||Spindle seals, bearings, forming plates||Anti-corrosion, anti-wear|
|High temperature||Kiln devices, crucibles,?heat-transfer devices||Anti-heat, high thermo-conductivity|
|Large power cooling||Seals, base boards||High thermo-conductivity|
|Metallurgy||Refractory materials, heat exchangers||Anti-heat, anti-corrosion, anti-oxidation, airtight|
|Military||Tanks, helicopters, warships||Bulletproof sheets||Light in weight, high bulletproof coefficient|