Silicon Carbide

Silicon Carbide is the only chemical compound of carbon and silicon. It was originally produced by a high temperature electro-chemical reaction of sand and carbon. Silicon carbide is an excellent abrasive and has been produced and made into grinding wheels and other abrasive products for over one hundred years. Today the material has been developed into a high quality technical grade ceramic with very good mechanical properties. It is used in abrasives, refractories, ceramics, and numerous high-performance applications. The material can also be made an electrical conductor and has applications in resistance heating, flame igniters and electronic components. Structural and wear applications are constantly developing.

Low density; High strength;
Low thermal expansion;
High thermal conductivity;
High hardness; High elastic modulus

Typical Uses
Fixed and moving turbine components
Suction box covers
Seals, bearings
Ball valve parts
Hot gas flow liners
Heat exchangers
Semiconductor process equipment

Parameter         SSiC         RBSiC         Carbide SiC
Purity( % )        >97            >90           30%
Hardness( HRA )    >90            >90           >85
Grain Size( um )   0.5-0.7        8-20          20-40
Density( g/cm3 )   3.06-3.15      >3.05         >2.65
Bend Strength( MPa ) 400-580      350-450       200
Compressive Strength(MPa) 3900     >2500        1800
Fracture Toughness( MPA ) 3.05     -4.6         4.3  
Elastic Modulus( GPa ) 380         -410         420  
Thermal Conductivity(W/M.K) 102.6  35-110       125
heat Expansion      4.02x10-6      4.3x10-6     3x10-6
Poisson Ratio           0.14        0.15

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