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.
|Very high mechanical strength||Very low thermal conductivity|
|High impact resistance||High chemical resistance (acids/bases)|
|Very high wear resistance||High corrosion resistance|
|Very high erosion resistance|
|Structural ceramics||Fiber optic ferrules and sleeves|
|Wear parts||Oxygen sensors|
|Cutting tools (knives, blades, shears)||Precision ball valve, balls and seats|
|Deep well, down hole components||Rollers and guide for metal tube forming|
|Thread and wire guides||Hot metal extrusion dies|
|Thermal barrier coatings||Solid oxide fuel cell components|
|YTZP Properties degrade rapidly when exposed to water vapor at 200 - 300° C.||Strength & toughness degrade with increasing temperature, generally limiting structural use to below 500° C.|
|Materials Property Chart|
|Note: The information in this data sheet is for design guidance only. STC does not warrant this data as absolute values. Forming methods and specific geometry could affect properties. Slight adjustments can be made to some of the properties to accommodate specific customer requirements. Most of the dense materials in the table are resistant to mechanical erosion and chemical attack. STC has performed ASTM testing qualification for certain compositions, in accordance with ASTM D2442. Please consult our technical staff for appropriate material and specific test results.|