Sintered Silicon Carbide (SSiC)

Sintered Silicon Carbide (SSiC)

Sintered from high purity ultra-fine silicon carbide powder (sub-micron) in a vacuum furnace at the temperature of 2100°C – 2200°C. The sintering process will densify the green body. Direct Sintered SiC is better grade than Reaction Bonded SiC, and is commonly specified for high temperature work and hard-faced seal components. Pressureless sintering is the sintering of a powder compact (sometimes at very high temperatures, depending on the powder) without applied pressure. This avoids density variations in the final component, which occurs with more traditional hot-pressing methods.

Application of SSiC:

  • Automotive components & Seal Faces
  • Mechanical Seals
  • Bearings
  • Heat exchanger tubes
  • Process industry valve application
  • Ballistics (body armor & armor plates)

Technical properties of SSiC product :

Properties Unit of Measurement Values
Purity (silicon) % >=98.5
Density g/cm3 3.12~3.15
Hardness HV 2820
Closed porosity % <2
Compressive strength MPa >3000
Young’s modulus GPa 400
Transverse rupture strength MPa >390
Coefficient of thermal expansion 10-6/ok 4
Elastic modulus GPa >=410
Thermal conductivity W / m.ok 110
Mean specific heat J/kg K 1200
Max. use temp oC 1750
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