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Silicon Carbide (SiC) - Hot Pressed Silicon Carbide - Supplier Data by Goodfellow

Silicon Carbide (SiC) - Hot Pressed Silicon Carbide - Supplier Data by Goodfellow

Jan 6 2004

Background

Silicon Carbide - Hot Pressed Silicon Carbide is a high density, high strength material which has been used in refractory applications for many years. It is now used for a wide range of engineering applications.Silicon Carbide - Hot Pressed Silicon Carbide can be highly polished and has potential for space-based mirrors, because of its high specific strength and stiffness compared with those of glass.

Key Properties

The key properties of Silicon Carbide (SiC) - Hot Pressed Silicon Carbide are tabulated below.

Table 1.Key properties

Chemical Resistance
Acids - concentratedGood
Acids - diluteGood
AlkalisGood-Poor
HalogensGood-Poor
MetalsFair
Electrical Properties
Dielectric constant40
Volume resistivity (Ohm.cm)10 3-10 5 @ 25 °C
Mechanical Properties
Compressive strength (MPa)1000-1700
Hardness - Vickers (kgf.mm-2)2400-2800
Shear strength (MPa)210-380
Tensile modulus (GPa)200-500
Tensile strength (MPa)400
Physical Properties
Apparent porosity (%)0
Density (g.cm-3)3.15
Thermal Properties
Coefficient of thermal expansion (x10-6 K-1)4.5 @ 20-1000 °C
Melting point (°C)2650-2950
Specific heat (J.K-1.kg-1)670-710 @ 25 °C
Thermal conductivity (W.m-1.K-1)90-160 @ 20 °C
Upper continuous use temperature (°C)1500-1650

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