Syalon 501

Syalon 501 is an advanced silicon nitride (Si3N4) ceramic composite offering outstanding mechanical properties combined with electrical conductivity.

Syalon 501 is a composite grade silicon nitride based sialon ceramic developed to provide an electrically conducting advanced ceramic with the traditional silicon nitride properties of high strength, toughness and hardness. This allows Syalon 501 to be electro–discharge machined into more complex shapes than other types of silicon nitride without the need for expensive diamond grinding and any major loss in it's fundamental properties.

Silicon nitride and sialon ceramics are generally electrical insulators. However, the composite nature of Syalon 501 imparts electrical conductivity while maintaining excellent wear resistance. It has found application as extrusion dies, complex moulds for metal and plastic forming and die pressing and as a level sensor in the non-ferrous molten metal industry.

The physical property data for Syalon 501, shown in the table below, although reduced slightly compared to Syalon 101, are still better than those of many aluminas and silicon carbide ceramics. Syalon 501 can be used in air up to around 700°C.

Physical property data for Syalon 501

Property Value Units
Composition β-Sialon/TiN -
Density 4.01 g/cc
Porosity 0 %
3 point Modulus of Rupture at 20°C
(Specimen 3 × 3 × 50mm, span 19.05mm)
825 MPa
Weibull Modulus 11 -
Young's Modulus of Elasticity 340 GPa
Poisson's Ratio 0.31 -
Hardness (HRA) 90.5 -
Hardness (Vickers Hv50) 13.24 (1350) GPa (Kg/mm2)
Fracture Toughness K1C 5.7 MPa m½
Thermal Expansion Coefficient (0-1200°C) 5.6X10-6 K-1
Thermal Conductivity 19 W/(mK)
Specific Heat 630 J/kg/K
Thermal Shock Resistance 400 ΔT°C quenched in cold water
Maximum Use Temperature 700 °C
Electrical Resistivity 7.2X10-4 ohm cm

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.

In addition, see our resources section for guides on designing with ceramics and more property data comparing Syalon 501 with other engineering ceramics.

Syalon 501