Ceramic Properties - Silicon Carbide (SiC)
SiC is an artificial (man-made) mineral known for its very high hardness and abrasion resistance. Common ceramic parts applications include pump seals, valve components, and wear intensive applications such as rollers and paper industry retainers.
Properties Units Test Value Physical Chemical Formula a-SiC Density, r g/cm3 ASTM C20 3.21 Color dark gray Crystal Structure hexagonal Water Absorption % @R.T. ASTM C373 0.0 Hardness Moh's 9 - 10 Hardness knoop (kg/mm2) Knoop 100g 2800 Mechanical Compressive Strength MPa @ R.T. ASTM C773 1725 - 2500 Tensile Strength MPa @ R.T. ACMA Test #4 310 Modulus of Elasticity
GPa ASTM C848 476 Flexural Strength (MOR) MPa @ R.T. ASTM F417 324 Poisson's Ratio, u ASTM C818 0.19 Fracture Toughness, KIc MPa x m1/2 Notched Beam Test 4.0 Thermal Max. Use Temperature
(* denotes inert atm.)
C No load cond. 1400 Thermal Shock Resistance DT (C) Quenching 350 - 500 Thermal Conductivity W/m-K @ R.T. ASTM C408 41 Coefficient of Linear Thermal Expansion, al mm/m-C (~25C through 1000C) ASTM C372 5.12 Specific Heat, cp cal/g-C @ R.T. ASTM C351 0.15 Electrical Dielectric Constant 1MHz @ R.T. ASTM D150 10.2 Dielectric Strength kV/mm ASTM D116 -- Electrical Resistivity Wcm @ R.T. ASTM D1829 108
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