Silicon Nitride Bonded Silicon Carbide Port Bricks
Erosion resistance and absence of aluminum melt contamination
Application
In casting processes during the melting and refining of aluminum and its alloys.
Description
Silicon carbide (SiC) and silicon nitride-bonded silicon carbide (Si₃N₄-SiC) are high-performance specialty ceramic materials widely used in extreme environments requiring high temperature resistance, corrosion resistance, and high wear resistance. By combining the high hardness of SiC with the toughness of Si₃N₄, the composite exhibits superior flexural strength and fracture toughness compared to pure SiC. While pure SiC offers higher hardness, it is more brittle; the incorporation of Si₃N₄ as a bonding phase enhances the material’s toughness, making it more suitable for applications involving mechanical impact.
Specifications
| Item | Si₃N₄ Bonded SiC Port Bricks |
|---|---|
| SiC % ≥ | 72 |
| Si3N4 % ≥ | 20 |
| Fe2O3 % ≤ | 0.7 |
| Service Temperature °С | 1550 |
| Bulk Density g/cm3 ≥ | 2.6 |
| Apparent Porosity % ≤ | 20 |
| CCS MPa ≥ | 120 |
| CMOR MPa ≥ | |
| Normal Temperature | 35 |
| 1200°С | 40 |
| Service Area | Casting port of aluminum (aluminum alloy) melting and refining |
Features
Excellent thermal shock resistance
Due to the low thermal expansion coefficient of Si₃N₄