Silicon Carbide vs. Gallium Arsenide
Silicon carbide belongs to the non-oxide engineering ceramics classification, while gallium arsenide belongs to the non-glass optical ceramics. There are 10 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 carbide and the bottom bar is gallium arsenide.
Metric UnitsUS Customary Units
Material Properties
| Density, g/cm3 | 3.0 to 3.2 | |
| 5.3 |
| Elastic (Young's, Tensile) Modulus, GPa | 370 to 490 | |
| 85 |
| Knoop Hardness | 2500 to 2900 | |
| 750 |
| Poisson's Ratio | 0.14 to 0.21 | |
| 0.31 |
| Specific Heat Capacity, J/kg-K | 670 to 1180 | |
| 360 |
| Stiffness to Weight: Axial, points | 69 to 84 | |
| 8.9 |
| Stiffness to Weight: Bending, points | 79 to 82 | |
| 28 |
| Thermal Conductivity, W/m-K | 120 to 170 | |
| 47 |
| Thermal Diffusivity, mm2/s | 38 to 79 | |
| 25 |
| Thermal Expansion, µm/m-K | 4.0 to 4.5 | |
| 5.6 |