CeramaZirc Ultra Tough
Advanced High Fracture Toughness Zirconia Composite
Dubbed ‘ceramic steel’ Zirconia (ZrO2) ceramic materials offer a combination of high hardness, wear and corrosion resistance while still maintaining one of the highest figures for fracture toughness amongst ceramic materials.
CeramaZirc Ultra Tough is an advanced zirconia-based ceramic composite material based on partially stabilised zirconia and alumina platelets and is the latest and toughest composite to be introduced by Precision Ceramics.
- Use temperatures up to 1500°C
- Sintered to full density for a pore free structure and competitive price
- No compromise between bending strength, hardness and fracture toughness
- Remarkably high fracture toughness and impact resistance while maintaining above average values for bending strength and hardness
- Toughening by crack deflection provided by a unique microstructure in a partially stabilised zirconia matrix
- Increased resistance to hydrothermal ageing through Ceria partial stabilisation
The below table compares the typical properties of the different CeramaZirc materials:
| Properties | Unit | 3YZ | Nano-HIP | Ultra-Tough | Ultra-Tough HIP |
|---|---|---|---|---|---|
| Density | g/cm3 | 6.05 | 6.07 | 5.7 | 5.7 |
| Flexural Strength | MPa | 1200 | 1400 | 1000 | 1000 |
| Compressive Strength | MPa | 2100 | 2100 | >2000 | >2000 |
| Youngs Modulous | GPa | 200 | 200 | 235 | 235 |
| Poisson Ratio | 0.30 | 0.30 | 0.29 | 0.29 | |
| Hardness HV0.5 | GPa | 13.5 | 14.5 | 13 | 13 |
| Fracture Toughness KIC | Mpa/m2 | 8 | 8 | 17 | 17 |
| Max Use Temperature | °C | 1000 | 1000 | 1000 (under load) 1500 (no load) | 1000 (under load) 1500 (no load) |
| Thermal Expansion Coefficient | X10-6/°C | 10 | 10 | ||
| Thermal Conductivity | W/mk | 2 | 2 | ||
| Thermal Shock Resistance | ʌT°C | 250 | 250 |
