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Silicon nitride ceramics are inorganic material ceramics that do not shrink during sintering.
Silicon nitride hardness is extremely high, especially hot-pressed silicon nitride, is one of the hardest substances in the world, with high hardness, low density, high temperature resistance and other properties.
Si3N4 has good impact resistance due to its low thermal expansion coefficient and high thermal conductivity.
Properties of Silicon Nitride :
Low density (3.2 g/cm3);Low-friction and non-magnetic
High fracture toughness (7 MPam1/2)
Good flexural strength (850 MPa)
Low thermal expansion coefficient (3.2 10-6K-1)
Creep resistance;High hardness
Excellent Wear and Corrosion Resistance
Silicon Nitride applications:
Bearing balls and rollers
Cutting tools;Turbine blades
Valves, turbocharger rotors for engines
Glow plugsMolten metal handling
Thermocouple sheaths;Welding nozzles
Welding jigs and fixtures
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