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Silicon Nitride/Aluminium Nitride/Aluminium Oxide ( Sialon )

Material Information

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Common Brand Names:
Syalon®
 
General Description:  

Sialon® is a solid solution of Silicon Nitride with Aluminium Oxide and Aluminium Nitride. It exhibits high strength at high temperatures, is hard, tough and wear resistant. It is chemically inert and thermal shock resistant. These properties all make Sialon® ideal for foundry use, including use as containers for molten metals. Sialon® is non-wetting for most non-ferrous metals up to 1000C. It has found use as thermocouple sheaths and the high wear resistance lends itself to components such as extrusion tools drawing dies and plugs. The surface finish of Sialon® after firing may be improved by diamond grinding.

   

Chemical Resistance

Acids - concentrated Good
Acids - dilute Good
Alkalis Fair

Electrical Properties

Volume resistivity @25C ( Ohmcm ) 1012-1017

Mechanical Properties

Compressive strength ( MPa ) >3500
Hardness - Vickers ( kgf mm-2 ) 1650-1800
Tensile modulus ( GPa ) 280-300

Physical Properties

Apparent porosity ( % ) 0.01
Density ( g cm-3 ) 3.24

Thermal Properties

Coefficient of thermal expansion @20-1000C ( x10-6 K-1 ) 3.3-3.7
Specific heat @25C ( J K-1 kg-1 ) 620-710
Thermal conductivity @20C ( W m-1 K-1 ) 20
Upper continuous use temperature ( C ) 1000

Buy Silicon Nitride/Aluminium Nitride/Aluminium Oxide on-line

We stock and supply the following standard forms:
Sheet
Sheet

Choose a form to search our on-line catalogue  

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