CVD Diamond vs. Reaction Bonded Silicon Carbide
Both CVD diamond and reaction bonded silicon carbide are non-oxide engineering ceramics. There are 15 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.
For each property being compared, the top bar is CVD diamond and the bottom bar is reaction bonded silicon carbide.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 1050 | |
| 370 |
| Fracture Toughness, MPa-m1/2 | 5.5 | |
| 4.0 |
| Poisson's Ratio | 0.1 | |
| 0.19 |
| Tensile Strength: Ultimate (UTS), MPa | 750 | |
| 310 |
Thermal Properties
| Specific Heat Capacity, J/kg-K | 500 | |
| 1180 |
| Thermal Conductivity, W/m-K | 1900 | |
| 140 |
| Thermal Expansion, µm/m-K | 1.0 | |
| 4.3 |
Electrical Properties
| Electrical Resistivity Order of Magnitude, 10x Ω-m | 13 | |
| 0.94 |
Otherwise Unclassified Properties
| Density, g/cm3 | 3.5 | |
| 3.0 |
Common Calculations
| Stiffness to Weight: Axial, points | 170 | |
| 69 |
| Stiffness to Weight: Bending, points | 96 | |
| 80 |
| Strength to Weight: Axial, points | 59 | |
| 28 |
| Strength to Weight: Bending, points | 52 | |
| 34 |
| Thermal Diffusivity, mm2/s | 1080 | |
| 38 |
| Thermal Shock Resistance, points | 51 | |
| 14 |