2024 Aluminum vs. Silicon Nitride
2024 aluminum and silicon nitride belong to fundamentally different material chemistries. 2024 aluminum is a metal, while silicon nitride is a ceramic material. Therefore, their performance will be even more dissimilar than would be suggested by the difference in properties. There are 10 material properties with values for both materials. Properties with values for just one material (28, in this case) are not shown.
For each property being compared, the top bar is 2024 aluminum and the bottom bar is silicon nitride.
Metric UnitsUS Customary Units
Material Properties
Density, g/cm3 | 3.0 | |
2.2 to 3.4 |
Elastic (Young's, Tensile) Modulus, GPa | 71 | |
140 to 310 |
Maximum Temperature: Mechanical, °C | 200 | |
1000 to 1330 |
Poisson's Ratio | 0.33 | |
0.24 to 0.27 |
Specific Heat Capacity, J/kg-K | 880 | |
720 to 800 |
Stiffness to Weight: Axial, points | 13 | |
34 to 53 |
Stiffness to Weight: Bending, points | 46 | |
65 to 78 |
Thermal Conductivity, W/m-K | 120 | |
12 to 31 |
Thermal Diffusivity, mm2/s | 46 | |
7.5 to 13 |
Thermal Expansion, µm/m-K | 23 | |
2.5 to 3.2 |