Syalon 201 – An Advanced Silicon Nitride Ceramic
Syalon 201 is an advanced silicon nitride based sialon ceramic offering outstanding mechanical strength retention at up to 1350°C.
Syalon 201, a silicon nitride based advanced ceramic, is a specially formulated grade based on the β-sialon phase found in Syalon 101 but with a crystalline intergranular phase of yttrium aluminium garnet (YAG). This enables Syalon 201 to exhibit significant retention of strength at high temperatures up to 1350°C.
Syalon 201 is an outstanding engineering grade material which is characterised by excellent high temperature strength and hardness. It has found use in molten metal handling applications where the use of Syalon 101 is limited due to its reduction in strength above about 1000°C.
The table below lists typical mechanical, thermal and electrical property data for Syalon 201.
Physical property data for Syalon 201
| Property | Value | Units |
|---|---|---|
| 3 point RT Modulus of Rupture (Specimen 3 × 3 × 50mm, span 19.05mm) |
825 | MPa |
| 3 point Modulus of Rupture at 1000°C | 750 | MPa |
| 3 point Modulus of Rupture at 1350°C | 600 | MPa |
| Weibull Modulus | 10 | - |
| RT Unit Tensile Strength | 350 | MPa |
| RT Young's Modulus of Elasticity | 290 | GPa |
| RT Hardness (HRA) | 92.7 | - |
| RT Hardness (Vickers Hv0.3) | 1600 | Kg/mm2 |
| Fracture Toughness K¹C | 4.5 | MPam½ |
| Poisson's Ratio | 0.23 | - |
| Density | 3.24 | g/cc |
| Porosity | 0 | % |
| Thermal Expansion Coefficient (0-1200°C) | 3X10-6 | K-1 |
| RT Thermal Conductivity | 21 | W/(mK) |
| Thermal Shock Resistance | 600 | ΔT°C quenched in cold water |
| RT Electrical Resistivity | 1010 | ohm m |
Typical physical property data obtained under test conditions. All properties have been measured by independent testing authorities. The values given only apply to the test bodies on which they were determined, and therefore can only be recommended values. See our disclaimer.
The successful integration of advanced technical ceramics into engineering systems requires close collaboration between you, the end-user, and ourselves, the material suppliers. Please contact our Technical Department to discuss your requirments in detail and assist in exploiting the significant advantages which silicon nitride based sialon fine ceramics offer.
Alternatively download the Syalon 201 Property Data Sheet PDF (0.13 Mb).