Boron Carbide vs. Aluminum Nitride
Both boron carbide and aluminum nitride are non-oxide engineering ceramics. There are 16 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.
For each property being compared, the top bar is boron carbide and the bottom bar is aluminum nitride.
Metric UnitsUS Customary Units
Mechanical Properties
| Compressive (Crushing) Strength, MPa | 1710 to 2200 | |
| 2100 |
| Elastic (Young's, Tensile) Modulus, GPa | 240 to 460 | |
| 330 |
| Flexural Strength, MPa | 170 to 410 | |
| 190 to 400 |
| Fracture Toughness, MPa-m1/2 | 2.5 to 3.5 | |
| 2.9 |
| Knoop Hardness | 2600 to 3200 | |
| 1160 |
| Poisson's Ratio | 0.17 to 0.19 | |
| 0.21 to 0.31 |
Thermal Properties
| Maximum Temperature: Mechanical, °C | 1000 to 2500 | |
| 1380 |
| Specific Heat Capacity, J/kg-K | 950 | |
| 780 |
| Thermal Conductivity, W/m-K | 31 to 90 | |
| 80 to 190 |
| Thermal Expansion, µm/m-K | 4.5 to 5.6 | |
| 4.2 to 5.4 |
Electrical Properties
| Dielectric Constant (Relative Permittivity) At 1 MHz | 6.4 | |
| 6.9 to 28 |
| Electrical Resistivity Order of Magnitude, 10x Ω-m | 0 to 11 | |
| 10 to 12 |
Otherwise Unclassified Properties
| Density, g/cm3 | 2.1 to 2.7 | |
| 2.9 to 3.3 |
Common Calculations
| Stiffness to Weight: Axial, points | 63 to 100 | |
| 55 to 63 |
| Stiffness to Weight: Bending, points | 91 to 100 | |
| 69 to 80 |
| Thermal Diffusivity, mm2/s | 16 to 38 | |
| 31 to 74 |