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Carbon-carbon vs. Silicon Carbide

Both carbon-carbon and silicon carbide are non-oxide engineering ceramics. There are 16 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is carbon-carbon and the bottom bar is silicon carbide.

Metric UnitsUS Customary Units

Mechanical Properties

Compressive (Crushing) Strength, MPa 240
2780 to 3900
Elastic (Young's, Tensile) Modulus, GPa 95
370 to 490
Poisson's Ratio 0.32
0.14 to 0.21
Tensile Strength: Ultimate (UTS), MPa 19
210 to 370

Thermal Properties

Maximum Temperature: Mechanical, °C 2400
500 to 1590
Specific Heat Capacity, J/kg-K 760
670 to 1180
Thermal Conductivity, W/m-K 40
120 to 170
Thermal Expansion, µm/m-K 4.0
4.0 to 4.5

Electrical Properties

Electrical Resistivity Order of Magnitude, 10x Ω-m -5.0
0.94 to 3.3

Otherwise Unclassified Properties

Density, g/cm3 1.7
3.0 to 3.2

Common Calculations

Stiffness to Weight: Axial, points 31
69 to 84
Stiffness to Weight: Bending, points 89
79 to 82
Strength to Weight: Axial, points 3.0
18 to 34
Strength to Weight: Bending, points 9.1
24 to 38
Thermal Diffusivity, mm2/s 31
38 to 79
Thermal Shock Resistance, points 3.5
6.9 to 18