Silicon Nitride (Si3N4 sintered SSN) vs Silicon Carbide (SiC sintered)
Property comparison of Silicon Nitride (Si3N4 sintered SSN) and Silicon Carbide (SiC sintered), both ceramic.
| Property | Silicon Nitride (Si3N4 sintered SSN) | Silicon Carbide (SiC sintered) | Difference |
|---|---|---|---|
| Elastic modulus | 270,000 MPa | 410,000 MPa | +52% |
| Shear modulus | 110,000 MPa | 170,000 MPa | +55% |
| Poisson ratio | 0.28 | 0.16 | -43% |
| Density | 3,200 kg/m³ | 3,150 kg/m³ | -2% |
| Thermal conductivity | 16 W/m·K | 120 W/m·K | +650% |
| Specific heat | 720 J/kg·K | 750 J/kg·K | +4% |
| Coefficient of thermal expansion | 0.000003 1/K | 0.000004 1/K | +33% |
Difference is Silicon Carbide (SiC sintered) relative to Silicon Nitride (Si3N4 sintered SSN). Values are taken from the representative row of each material; both materials may have multiple heat treatments or conditions on their individual pages.
Identification
- standard
- ASTM
- standard
- ASTM
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