Boron Carbide vs. CVD Diamond
Both boron carbide and CVD diamond are non-oxide engineering ceramics. There are 16 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.
For each property being compared, the top bar is boron carbide and the bottom bar is CVD diamond.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 240 to 460 | |
| 1050 |
| Fracture Toughness, MPa-m1/2 | 2.5 to 3.5 | |
| 5.5 |
| Poisson's Ratio | 0.17 to 0.19 | |
| 0.1 |
| Tensile Strength: Ultimate (UTS), MPa | 350 | |
| 750 |
Thermal Properties
| Specific Heat Capacity, J/kg-K | 950 | |
| 500 |
| Thermal Conductivity, W/m-K | 31 to 90 | |
| 1900 |
| Thermal Expansion, µm/m-K | 4.5 to 5.6 | |
| 1.0 |
Electrical Properties
| Dielectric Constant (Relative Permittivity) At 1 MHz | 6.4 | |
| 5.7 |
| Electrical Resistivity Order of Magnitude, 10x Ω-m | 0 to 11 | |
| 13 |
Otherwise Unclassified Properties
| Density, g/cm3 | 2.1 to 2.7 | |
| 3.5 |
Common Calculations
| Stiffness to Weight: Axial, points | 63 to 100 | |
| 170 |
| Stiffness to Weight: Bending, points | 91 to 100 | |
| 96 |
| Strength to Weight: Axial, points | 37 to 47 | |
| 59 |
| Strength to Weight: Bending, points | 42 to 53 | |
| 52 |
| Thermal Diffusivity, mm2/s | 16 to 38 | |
| 1080 |
| Thermal Shock Resistance, points | 9.7 to 20 | |
| 51 |