CeramTec Rocar® SiG Silicon Carbide, SiSiC

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CeramTec Rocar® SiG Silicon Carbide, SiSiC
Categories:	Ceramic; Carbide
Material Notes:	Rocar® is an extremely lightweight silicon carbide ceramic. It permits a reduction in mass forces at high speeds, and is considered for its hardness, excellent resistance to corrosion and sudden changes in temperature, excellent anti-friction properties, and higher heat conductivity over steel. The various types of Rocar® include sintered and silicon infiltrated silicon carbide. In SiSiC, the pore cavities are filled with metallic silicon. Since shrinkage during firing is minimal, complex components can be produced with low tolerances. Its maximum application temperature is 1350°C. However, it is not suitable for use in highly alkaline media because of its content of metallic silicon.
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Physical Properties	Original Value	Comments

Density	3.07 g/cc	DIN EN 623-2
Water Absorption	0.00 %	Open Porosity; DIN EN 623-2
Porosity	0.00 %	closed (approximate)
Permeability	0.00	%, Gas
Weibull Modulus	>= 14	DINV ENV 843-5

Mechanical Properties	Original Value	Comments
Vickers Microhardness	1200	HV 0.2; Si; DINV ENV 843-4
	2700	HV 0.2; SiC; DINV ENV 843-4
Tensile Strength at Break	340 MPa	ACMA Test #4 / DIN EN 843-1
Tensile Modulus	380 GPa	Young's; DINV ENV 843-2
Flexural Strength	340 MPa @Temperature 20.0 °C	DIN EN 843-1
	340 MPa @Temperature 1000 °C	DIN EN 820-1
Compressive Strength	3500 MPa	DIN 51067T1
Poissons Ratio	0.17	DINV ENV 843-2
Fracture Toughness	4.00 MPa-m½	K_IC (SEVNB); DIN CEN/TS 14425-1
Shear Modulus	162 GPa	Calculated

Electrical Properties	Original Value	Comments
Volume Resistivity	<= 1.0 ohm-cm @Temperature 20.0 °C	IEC 672-1
	100 ohm-cm @Temperature 400 °C	IEC 672-1

Thermal Properties	Original Value	Comments
CTE, linear	3.40 µm/m-°C @Temperature 20.0 - 100 °C	DIN EN 821-1
	4.10 µm/m-°C @Temperature 20.0 - 400 °C	DIN EN 821-1
	4.40 µm/m-°C @Temperature 20.0 - 600 °C	DIN EN 821-1
	4.90 µm/m-°C @Temperature 20.0 - 1000 °C	DIN EN 821-1
Specific Heat Capacity	0.700 J/g-°C @Temperature 20.0 °C	DINV ENV 821-3
	1.30 J/g-°C @Temperature 1000 °C	DINV ENV 821-3
Thermal Conductivity	40.0 W/m-K @Temperature 1000 °C	DIN EN 821-2
	115 W/m-K @Temperature 20.0 °C	DIN EN 821-2
Maximum Service Temperature, Air	1350 °C
Maximum Service Temperature, Inert	1350 °C

Descriptive Properties
Ra = Arithmetic Mean Roughness Value (µm)	<0.03
Thermal Shock Resistance R1 (K)	181	calculated; R1 = [σ_s (1-µ)] / (α·E)

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to go back to viewing the property data in MatWeb's normal format.

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CCERA914 / 107514

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