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SiAlON vs. Carbon-carbon

Both SiAlON and carbon-carbon are non-oxide engineering ceramics. There are 17 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

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

Metric UnitsUS Customary Units

Mechanical Properties

Compressive (Crushing) Strength, MPa 2620
240
Elastic (Young's, Tensile) Modulus, GPa 290
95
Poisson's Ratio 0.23
0.32
Shear Modulus, GPa 120
36
Tensile Strength: Ultimate (UTS), MPa 190
19

Thermal Properties

Maximum Temperature: Mechanical, °C 1200
2400
Specific Heat Capacity, J/kg-K 880
760
Thermal Conductivity, W/m-K 19
40
Thermal Expansion, µm/m-K 3.6
4.0

Electrical Properties

Electrical Resistivity Order of Magnitude, 10x Ω-m 14
-5.0

Otherwise Unclassified Properties

Density, g/cm3 3.3
1.7

Common Calculations

Stiffness to Weight: Axial, points 50
31
Stiffness to Weight: Bending, points 67
89
Strength to Weight: Axial, points 16
3.0
Strength to Weight: Bending, points 22
9.1
Thermal Diffusivity, mm2/s 6.4
31
Thermal Shock Resistance, points 13
3.5