Silicon Carbide Properties

Silicon Carbide (SiC) is highly wear resistant and also has good mechanical properties, including high temperature strength and thermal shock resistance. Silicon Carbide (SiC), as a technical ceramic, is produced in two main ways. Reaction bonded SiC is made by infiltrating compacts made of mixtures of Silicon Carbide (SiC) and Carbon with liquid Silicon. The Silicon reacts with the Carbon forming Silicon Carbide (SiC). The reaction product bonds the SiC particles. Sintered SiC is produced from pure SiC powder with non-oxide sintering aids. Conventional ceramic forming processes are used and the material is sintered in an inert atmosphere at temperatures up to 2000°C or higher.

Silicon Carbide (SiC) maintains its high mechanical strength in temperatures as high as 1,400. It has higher chemical corrosion resistance than other ceramics.

Silicon Carbide Properties

Provided in the table below are properties of grades of silicon carbide supplied by FELDCO INTERNATIONAL.

Properties Units
Silicon Carbide 105
Silicon Carbide 106
Density g/cm3
3.15-3.20
3.17-3.20
Elastic Modulus (GPa)
400-430
400-450
Weibull Modulus -
12-15
12-18
Hardness HV(0.3) Kg/mm2
2300-2600
2300-2850
Fracture Toughness (MPa.m1/2)
3.5-4.1
4.1-4.3
Thermal Expansion Coefficient 10-6/°C; (RT - 1000°C)
60-120
115-120
Thermal Conductivity W/[email protected]°C.
60-120
60-120
Thermal Shock Parameter (°C)
164-180
164-240
Electrical Resistivity (ohm-cm)
100-106
107

This information has been sourced, reviewed and adapted from materials provided by FELDCO International.

For more information on this source please visit FELDCO International.

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