CeramTec SL 303 Silicon Nitride, SiAION+SiC

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CeramTec SL 303 Silicon Nitride, SiAION+SiC
Categories:	Ceramic; Nitride
Material Notes:	SL 303 is a silicon nitride ceramic. Silicon nitrides are ideal for components working under mechanical loads and engine parts, even and especially at elevated temperatures. Their property profile includes: extremely high strength, good crack resistance, outstanding wear resistance, good heat conductivity, very low heat expansion, and good resistance to sudden changes in temperature. Due to these properties and its low weight, silicon nitride is a material for the highest demands.
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Physical Properties	Original Value	Comments

Density	3.25 g/cc	DIN EN 623-2
Water Absorption	0.00 %	Open Porosity; DIN EN 623-2
Permeability	0.00	%, Gas
Weibull Modulus	12	DINV ENV 843-5

Mechanical Properties	Original Value	Comments
Vickers Microhardness	1730	HV1; DINV ENV 843-4
Tensile Modulus	345 GPa	Young's; DINV ENV 843-2
Flexural Strength	750 MPa	DIN EN 843-1
Compressive Strength	3000 MPa	DIN 51067T1
Poissons Ratio	0.25	DINV ENV 843-2
Fracture Toughness	5.50 MPa-m½	K_IC (SEVNB); DIN CEN/TS 14425-1
Shear Modulus	138 GPa	Calculated

Electrical Properties	Original Value	Comments
Volume Resistivity	2.00e+8 ohm-cm @Temperature 400 °C	IEC 672-1
	1.00e+10 ohm-cm @Temperature 20.0 °C	IEC 672-1
Dielectric Strength	2.80 kV/mm	IEC 672-1

Thermal Properties	Original Value	Comments
CTE, linear	2.00 µm/m-°C @Temperature 20.0 - 100 °C	DIN EN 821-1
	3.50 µm/m-°C @Temperature 20.0 - 400 °C	DIN EN 821-1
	3.60 µm/m-°C @Temperature 20.0 - 600 °C	DIN EN 821-1
Specific Heat Capacity	0.700 J/g-°C	DINV ENV 821-3
Thermal Conductivity	19.0 W/m-K	DIN EN 821-2
Maximum Service Temperature, Air	800 °C
Maximum Service Temperature, Inert	1600 °C

Descriptive Properties
Ra = Arithmetic Mean Roughness Value (µm)	<0.1
Thermal Shock Resistance R1 (K)	466	calculated; R1 = [σ_s (1-µ)] / (α·E)

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CCERA917 / 107517

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