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YTZP (Yttria Stabilized Zirconia)

Yttria Stabilized Zirconia (YTZP) is the strongest ceramic material we offer. YTZP is a purely tetragonal phase, fine grain material. This material offers the highest flexural strength of all Zirconia based materials. YTZP exhibits a trait called transformation toughening which allows it to resist crack propagation. Applied stress, magnified by the stress concentration at a crack tip, can cause the tetragonal phase to convert to monoclinic, with the associated volume expansion.

This phase transformation can then put the crack into compression, retarding its growth, and enhancing the fracture toughness. This mechanism significantly extends the reliability and lifetime of products made with stabilized zirconia. YTZP is well suited to replacing metals due to its extremely high strength and toughness, it also offers far higher resistance to chemicals and superior erosion resistance.

Prime Features
Very high mechanical strengthVery low thermal conductivity
High impact resistanceHigh chemical resistance (acids/bases)
Very high wear resistanceHigh corrosion resistance
Very high erosion resistance 

 

Typical Applications
Structural ceramicsFiber optic ferrules and sleeves
Wear partsOxygen sensors
Cutting tools (knives, blades, shears)Precision ball valve, balls and seats
Deep well, down hole componentsRollers and guide for metal tube forming
Thread and wire guidesHot metal extrusion dies
Thermal barrier coatingsSolid oxide fuel cell components

 

Application Limitations

YTZP Properties degrade rapidly when exposed to water vapor at 200 - 300º C.

Strength & toughness degrade with increasing temperature, generally limiting structural use to below 500º C.