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Syalon 101

Syalon 101 is an advanced silicon nitride (Si3N4) ceramic offering outstanding mechanical strength, thermal shock resistance and corrosion resistant properties.

Syalon 101 automotive partsSyalon 101, a silicon nitride based advanced ceramic, is the first of the Si–Al–O–N family of engineering ceramic materials which has been developed, characterised and is now being manufactured under carefully controlled conditions, ensuring a high quality material is consistantly produced.

Syalon 101 is a beta-sialon type ceramic and is an outstanding engineering grade material which is characterised by high strength, toughness and hardness and chemical and thermal stability. It has found use in applications demanding wear, corrosion and thermal shock resistance, where temperatures do not continuously exceed 1000°C, such as industrial wear, non-ferrous molten metal handling and metal forming.

The table below lists typical mechanical, thermal and electrical property data for Syalon 101.

Physical property data for Syalon 101

Property Value Units
Composition β-Sialon -
Density 3.24 g/cc
Porosity 0 %
3 point Modulus of Rupture at 20°C
(Specimen 3 × 3 × 50mm, span 19.05mm)
945 MPa
3 point Modulus of Rupture at 1000°C
700 MPa
Weibull Modulus 15 -
Compressive Strength >3500 MPa
Young's Modulus of Elasticity 288 GPa
Poisson's Ratio 0.23 -
Hardness (HRA) 92 -
Hardness (Vickers Hv50) 14.71 (1500) GPa (Kg/mm2)
Fracture Toughness K1C 7.7 MPa m½
Thermal Expansion Coefficient (0-1200°C) 3.0X10-6 K-1
Thermal Conductivity 28 W/(mK)
Specific Heat 650 J/kg/K
Thermal Shock Resistance 900 ΔT°C quenched in cold water
Maximum Use Temperature 1200 °C
Electrical Resistivity 1012 ohm cm
Dielectric Constant 8.1 -
Loss Tangent (10GHz) 0.0019 -

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.

In addition to this outstanding property data, Syalon 101 also has excellent resistance to corrosion, often required for applications in the chemical and process industries.

The tables below show the corrosion resistant behaviour of Syalon 101 in various acids and alkalis and molten metals.

Syalon 101 corrosion behaviour in acids and alkalis.

Acid/Alkali Conc. % Temp. Exposure time / hrs Reaction
Acetic Acid 100 Boiling 100 None
Benzoic Acid 100 Boiling 100 None
Formic Acid 100 Boiling 100 None
Hydrochloric Acid 33 Boiling 100 None
Hydrofluric Acid 100 Boiling 100 Strong
Nitric Acid 69 Boiling 100 Weak
Phosphoric Acid 100 Boiling 100 Weak
Sulphuric Acid 98 Boiling 100 None
Ammonium Chloride 98 Boiling 100 None
Potassium Chloride 100 Boiling 100 None
Sodium Chloride 100 Boiling 100 None
Sodium hydroxide 50 Boiling 100 None

Syalon 101 corrosion behaviour in molten metals.

Metal Temp. / °C Exposure time / hrs Reaction
Aluminium 950 1000 None
Bismuth 800 10 None
Brass 950 50 None
Cadmium 550 10 None
Cast iron 1450 2 Slight
Copper 1150 (in air) 10 Strong (reacts with CuO)
Copper 1150 (in vacuum) 10 None
Lead 400 200 None
Magnesium 750 100 None
Stainless steel 1450 10 Strong
Tin 300 100 None

Typical corrosion data obtained under test conditions. 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 101 with other engineering ceramics. For a comparison of the physical properties of all our materials see our Material Properties Datasheet.

Download the Syalon 101 Property Data Sheet PDF (0.19 Mb).

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