... Silicon nitride(Si3N4)Key Properties1, High strength over a wide temperature range2, High fracture toughness3, High hardness4, ... cam followers,tappet shims5, Turbine blades,vanes,buckets6, Metal tube forming rolls and dies7, Precision shafts and axies ... seals and shaft guides9, Oxygen sensors10, High temperature induction furnace susceptors11, Fuel cell membranes12, Electric furnace heaters over ...