Ferro-Ceramic Grinding Inc. machines over 15 different materials
Zirconia
Zirconia dioxide, simply known as zirconia, is an excellent ceramic material thanks to its remarkable hardness and resistance to fracture. Zirconia is a popular material of choice for many applications where durability is crucial, but zirconia machining is not as popular as other materials for various reasons.
For one, zirconia material is challenging to manufacture and is an expensive material in itself. Compared to other materials like alumina, zirconia requires more resources, so it’s typically used in limited quantities in smaller components as a supplemental material that enhances fracture and chip resistance.
Zirconia Properties
Zirconia ceramics have a martensite-type transformation mechanism of stress induction, giving the material the ability to absorb significant amounts of stress relative to other ceramic materials. Zirconia also exhibits the highest mechanical strength and toughness at room temperature.
Against wear, chemicals, and corrosion, zirconia is remarkably resistant. And zirconia provides low thermal conductivity, making it an excellent thermal insulator. There are many common applications for zirconia, including extrusion dies, wire and pipe extensions, guide and other wear rollers, pressure valves, and bearing materials.
If you’re interested in learning more about zirconia machining and the advantages that zirconia affords as a material, contact our helpful staff at Ferro-Ceramic.
| Properties | Units | Test | Value |
|---|---|---|---|
| Physical | |||
| Chemical Formula | - | - | iron, carbon alloy |
| Density, r | g/cm3 | ASTM C20 | 7.83 |
| Color | - | - | gray |
| Crystal Structure | - | - | - |
| Water Absorption | % @R.T. | ASTM C373 | - |
| Hardness | Moh's | - | 6.5 |
| Hardness | knoop (kg/mm2) | Knoop 100g | 605 |
| Mechanical | |||
| Compressive Strength | MPa @ R.T. | ASTM C773 | 1000 - 2000 |
| Tensile Strength | MPa @ R.T. | ACMA Test #4 | 1800 |
| Modulus of Elasticity (Young's Mod.) | GPa | ASTM C848 | 207 |
| Flexural Strength (MOR) | MPa @ R.T. | ASTM F417 | 276 |
| Poisson's Ratio, u | - | ASTM C818 | 0.30 |
| Fracture Toughness, KIc | MPa x m1/2 | Notched Beam Test | 50 - 80 |
| Thermal | |||
| Max. Use Temperature (* denotes inert atm.) | ºC | No load cond. | 760 |
| Thermal Shock Resistance | DT (ºC) | Quenching | 230 |
| Thermal Conductivity | W/m-K @ R.T. | ASTM C408 | 25 |
| Coefficient of Linear Thermal Expansion, al | mm/m-ºC (~25ºC through ±1000ºC) | ASTM C372 | 6.0 |
| Specific Heat, cp | cal/g-ºC @ R.T. | ASTM C351 | 0.12 |
| Electrical | |||
| Dielectric Constant | 1MHz @ R.T. | ASTM D150 | - |
| Dielectric Strength | kV/mm | ASTM D116 | - |
| Electrical Resistivity | Wcm @ R.T. | ASTM D1829 | 7.5 x 10-7 |