ZTA (Zirconia Toughened Alumina) is a composite material made from alumina and zirconia. It combines the outstanding characteristics of both materials.
Compared to conventional alumina, ZTA possesses superior hardness, higher flexural strength, and similar density. Compared to conventional zirconia, it possesses a lower coefficient of linear thermal expansion and higher thermal conductivity.
By leveraging these features, ZTA has been widely adopted in milling parts and wear-resistant parts that require cooling.
Slurry Wear Resistance Test
Test Conditions
| Material Material Code |
ZTA | Alumina | Zirconia | Stainless Steel | |||||
|---|---|---|---|---|---|---|---|---|---|
| AZ201O (AZ201) |
AZ205O (AZ205) |
AO479M (A479M) |
AO484O (A484) |
ZO201N (Z201N) |
SUS304 | ||||
| Alumina Content | ％ | - | - | 99.5 | 92 | - | - | ||
| Color | - | White | White | Ivory | White | Ivory | - | ||
| Density | g/cm3 | 4.0 | 4.3 | 3.9 | 3.6 | 6.0 | 7.9 | ||
| Mechanical Characteristics | Vickers Hardness HV9.807N | GPa | 17.0 | 16.0 | 15.7 | 12.3 | 12.3 | - | |
| Flexural Strength (3-point Bending) | MPa | 700 | 700 | 370 | 370 | 1,000 | - | ||
| Young’s Modulus | GPa | 380 | 335 | 370 | 280 | 200 | 193 | ||
| Poisson’s Ratio | - | 0.24 | 0.25 | 0.23 | 0.23 | 0.31 | 0.29 | ||
| Thermal Characteristics | Coefficient of Linear Thermal Expansion | 40～400℃ | × 10-6/K | 7.2 | 7.7 | 7.2 | 6.8 | 10.5 | 10.9 |
| 40～800℃ | 8.1 | 8.7 | 8.0 | 7.7 | 11.0 | - | |||
| Thermal Conductivity | 20℃ | W/ (m・K) | 30 | 17 | 32 | 17 | 3 | 16.7 | |
| Specific Heat Capacity | J/ (g・K) | 0.77 | 0.72 | 0.78 | 0.78 | 0.46 | 0.50 | ||
Disc Shape
Cylindrical Shape
Values are based on typical material properties and
may vary according to product configuration and manufacturing process.
