Silicon Nitride vs. Carbon-carbon
Both silicon nitride and carbon-carbon are non-oxide engineering ceramics. There are 12 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.
For each property being compared, the top bar is silicon nitride and the bottom bar is carbon-carbon.
Metric UnitsUS Customary Units
Mechanical Properties
| Compressive (Crushing) Strength, MPa | 600 to 2950 | |
| 240 |
| Elastic (Young's, Tensile) Modulus, GPa | 140 to 310 | |
| 95 |
| Poisson's Ratio | 0.24 to 0.27 | |
| 0.32 |
Thermal Properties
| Maximum Temperature: Mechanical, °C | 1000 to 1330 | |
| 2400 |
| Specific Heat Capacity, J/kg-K | 720 to 800 | |
| 760 |
| Thermal Conductivity, W/m-K | 12 to 31 | |
| 40 |
| Thermal Expansion, µm/m-K | 2.5 to 3.2 | |
| 4.0 |
Electrical Properties
| Electrical Resistivity Order of Magnitude, 10x Ω-m | 11 to 12 | |
| -5.0 |
Otherwise Unclassified Properties
| Density, g/cm3 | 2.2 to 3.4 | |
| 1.7 |
Common Calculations
| Stiffness to Weight: Axial, points | 34 to 53 | |
| 31 |
| Stiffness to Weight: Bending, points | 65 to 78 | |
| 89 |
| Thermal Diffusivity, mm2/s | 7.5 to 13 | |
| 31 |