Silicon Carbide vs. CVD Diamond
Both silicon carbide and CVD diamond are non-oxide engineering ceramics. There are 15 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 silicon carbide and the bottom bar is CVD diamond.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 370 to 490 | |
| 1050 |
| Fracture Toughness, MPa-m1/2 | 3.4 to 4.6 | |
| 5.5 |
| Poisson's Ratio | 0.14 to 0.21 | |
| 0.1 |
| Tensile Strength: Ultimate (UTS), MPa | 210 to 370 | |
| 750 |
Thermal Properties
| Specific Heat Capacity, J/kg-K | 670 to 1180 | |
| 500 |
| Thermal Conductivity, W/m-K | 120 to 170 | |
| 1900 |
| Thermal Expansion, µm/m-K | 4.0 to 4.5 | |
| 1.0 |
Electrical Properties
| Electrical Resistivity Order of Magnitude, 10x Ω-m | 0.94 to 3.3 | |
| 13 |
Otherwise Unclassified Properties
| Density, g/cm3 | 3.0 to 3.2 | |
| 3.5 |
Common Calculations
| Stiffness to Weight: Axial, points | 69 to 84 | |
| 170 |
| Stiffness to Weight: Bending, points | 79 to 82 | |
| 96 |
| Strength to Weight: Axial, points | 18 to 34 | |
| 59 |
| Strength to Weight: Bending, points | 24 to 38 | |
| 52 |
| Thermal Diffusivity, mm2/s | 38 to 79 | |
| 1080 |
| Thermal Shock Resistance, points | 6.9 to 18 | |
| 51 |