Zirconium Toughened Alumina

ZTA - Aluminum Zirconium

Zirconia toughened alumina is a composite of alumina and zirconia which leads to an increase in strength and fracture toughness as compared to other aluminas.

Increased Fracture Toughness

The high fracture toughness gives it very good edge strength and makes the material ideal for components subjected to impact loading.

Excellent Wear Resistance

During the sintering process, an extremely smooth microstructure is achieved which leads to superior wear performance.

Good Thermal Conductivity

ZTA materials provide for good dissipation of heat generated by friction.

ZTA Wear Tiles
Zirconia Toughened Alumina (ZTA) Wear Tiles

Zirconia Toughened Alumina Ceramic Properties

All properties are at room temperature (20°C) unless otherwise stated.

Physical Property Units Typical Value
Density g/cc 4.17
Grain Size μm 6
Hardness (Vickers) GPa 14.5
Fracture Toughness MPam^1/2 6
Flexural Strength MPa 586
Tensile Strength MPa 344
Compressive Strength MPa 2758
Elastic Modulus GPa 338
Poisson's Ratio - 0.23
Coefficient of Thermal Expansion 1 x 10-6 in/in °C 6.0
Volume Resistivity Ω-cm 10^14