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Saint-Gobain Innovative Materials - NBD-200 Silicon Nitride Ceramic Balls
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CERBEC ® ceramic balls are used in hybrid bearings for a wide variety of applications.
CERBEC Balls are made from two types of silicon nitrides made by Saint-Gobain Ceramics: NBD200 and SN101C. They are both fabricated using glass encapsulation HIPing which assures 100% density, high beta phase content,micron-sized grains, and minimal levels of glass phase.
NBD-200 is a "Magnesia" doped materia. It is Hot Isostatically Pressed (HIP) and meets the demanding requirements of ball bearing and check valve applications.
Due to the HIP processing, it has zero porosity, fine grain microstructures, minimal level of dopant, and appropriate levels of strength, hardness, toughness, and rolling contact fatigue behavior to work exceptionally well in ball bearing and check valve applications.
The dopant or "sintering aid" is the controlling factor concerning corrosion resistance. Magnesia based silicon nitrides are highly inert in most liquids and gases.
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