Syalon 101 | Silicon Nitride Ceramic

Syalon 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.