CeramTec SL 200 ST Silicon Nitride, Si3N4-Y2O3

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CeramTec SL 200 ST Silicon Nitride, Si3N4-Y2O3
Categories:	Ceramic; Nitride
Material Notes:	SL 200 ST is a silicon nitride ceramic especially suitable for components exposed to mechanical stress and engine-specific applications even at elevated temperatures. It is recognized for its high strength and crack resistance, as well as its resistance to sudden changes in temperature. In contrast to the other silicon nitride materials, this is a gas-pressure sintered Si3N4 and hence possesses much better mechanical properties such as greater flexural strength, fracture toughness, and a higher Weibull modulus.
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Physical Properties	Original Value	Comments

Density	3.21 g/cc	DIN EN 623-2 / ASTM-C373 / ASTM-C20
Water Absorption	0.00 %	DIN EN 623-2 / ASTM-C373
Permeability	0.00	Gas
Weibull Modulus	15	DINV ENV 843-5

Mechanical Properties	Original Value	Comments
Vickers Microhardness	1500	HV 0.5; DINV ENV 843-4
Tensile Strength at Break	750 MPa	ACMA Test #4 / DIN EN 843-1
Tensile Modulus	305 GPa	Young's; DINV ENV 843-2 / ASTM-F417
Flexural Strength	900 MPa	DIN EN 843-1
Compressive Strength	3000 MPa	ASTM C-773-88 / DIN 51067T1
Poissons Ratio	0.26	DINV ENV 843-2
Fracture Toughness	7.00 MPa-m½	DIN 51109
Shear Modulus	121 GPa	Calculated

Electrical Properties	Original Value	Comments
Volume Resistivity	1.00e+14 ohm-cm	ASTM-D257
Dielectric Constant	8.0 @Frequency 1e+6 Hz	IEC 672-1 / ASTM-C150
Dielectric Loss Index	0.00010 @Frequency 1e+9 Hz	IEC 672-1 / ASTM-D149,150

Thermal Properties	Original Value	Comments
CTE, linear	3.20 µm/m-°C @Temperature 20.0 - 200 °C	DIN EN 821-1
	4.30 µm/m-°C @Temperature 20.0 - 1000 °C	DIN EN 821-1
Specific Heat Capacity	0.700 J/g-°C @Temperature 100 - 200 °C	DINV ENV 821-3
Thermal Conductivity	21.0 W/m-K @Temperature 20.0 - 100 °C	DIN EN 821-2 / ASTM-C408
Maximum Service Temperature, Air	1300 °C
Maximum Service Temperature, Inert	1600 °C

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CCERA942 / 107542

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