Corrosion-resistant and wear-resistant silicon carbide water pump mechanical seal ring/face

Silicon Carbide (SiC) is one of the most popular high performance tribo-materials, which has been commercially available for more than twenty-five years. Its features include:· Excellent abrasion and wear resistance· Excellent corrosion resistance· Low coefficient of friction· Low coefficient of therm

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Silicon Carbide (SiC) is one of the most popular high performance tribo-materials, which has been commercially available for more than twenty-five years. Its features include:

· Excellent abrasion and wear resistance
· Excellent corrosion resistance
· Low coefficient of friction
· Low coefficient of thermal expansion
· High thermal conductivity
· Hardness greater than Tungsten Carbide

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.

 
ParameterUnitRB SiCSSiC
Densityg/cm33.0 - 3.053.1
Free Silicon Content-12%-
Crystal Sizeµm8 - 205 - 7
HardnessRockwellHRA 90HRA 93
Compressive StrengthMPa27003000
Flexural StrengthMPa400400
Fracture ToughnessMPa4.34.5
Elastic ModulusGPa390410
Poisson's Ratio-0.150.15
Coefficient of Thermal Expansion1 x 10-6 / K4.34.3

Corrosion and Abrasion Resistance Silicon Carbide Water Pump Mechanical Seal Rings/Faces

 

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