Description
Silicon Carbide (SiC) is one of the best performing ceramic material, which has been commercially available for more than twenty-five years. SiC's 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 Champ sealing provides different grades of SiC:· 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. | Parameter | Measurements | RB SiC | SSiC | SSIC+C |
| Density | g/cm3 | ≥3.03 | 3.08~3.15 | 2.95~3.05 |
| Indicated Porosity | % | ≤1% | ≤1% | ≤1% |
| Crystal Size | µm | ≤10 | ≤10 | ≤10 |
| Hardness | Rockwell | ≥90 | ≥92 | ≥92 |
| Compressive Strength | MPa | 3000 | 3000 | ≥2200 |
| Transverse Strength | MPa | ≥350 | 400 | ≥200 |
| Maximum Temperature | ºC | 1200 | 1600 | 1500 |
| Elastic Modulus | GPa | 350 | 400 | ≥250 |
| Thermal Conductivity | W/m*k | 30~130 | 30~130 | 30~130 |
| Coefficient of Thermal Expansion | 1 x 10-6 / ºC | 4~5 | 4~5 | 4~5 |
Complaint
