Silicon Nitride Bearing Description
Silicon Nitride Bearing is an ideal material for bearings parts. Silicon Nitride Bearings have good wear and corrosion resistance, and great mechanical strength under high temperature. We can supply full ceramic and hybrid bearings products made by Silicon Nitride, Zirconia as well as SiC.
Silicon Nitride Bearing Specification
Comparison of ceramic and Steel for bearings
|
Si3N4 |
ZrO2 |
Steel |
Working temperature |
800 ℃ |
800 ℃ |
180 ℃ |
Density |
3.24 g/cm3 |
6 g/cm3 |
7.8 g/cm3 |
Thermal expansion coeff. |
3.4×10-6 K-1 |
10.5×10-6 K-1 |
12.5×10-6 K-1 |
Hardness, HV |
1500 |
1300 |
About 750 |
Young's Module |
320 GPa |
210 GPa |
208 GPa |
Corrosion resistance |
Good |
Good |
Poor |
Thermal conductivity |
Low |
Low |
High |
Magnetism |
None |
None |
Yes |
Wear resistance |
Excellent |
Excellent |
Good |
Silicon Nitride Bearing Applications
1. Aerospace Industry: Used in aircraft engines and other components where high strength and low weight are crucial.
2. Automotive Industry: Utilized in high-performance and electric vehicles for components like turbochargers, fuel pumps, and wheel bearings due to their ability to reduce friction and increase efficiency.
3. Machine Tooling: Their hardness and low thermal expansion are advantageous in high-speed and precision machine tools.
4. Wind Turbines: Used in the bearings of wind turbines for their durability and ability to withstand harsh environmental conditions.
5. Medical Devices: Incorporated in medical instruments and implants due to their biocompatibility and resistance to wear and corrosion.
6. Electronics: Applied in semiconductor manufacturing equipment where high precision and cleanliness are essential.
7. Chemical Industry: Utilized pumps and valves that handle corrosive chemicals, benefiting from silicon nitride’s chemical inertness.
8. Sports Equipment: It is found in high-performance bicycle wheel bearings and other sports equipment due to their lightweight and durability.
Silicon Nitride Bearing Packing
Our Silicon Nitride Bearing is carefully handled during storage and transportation to preserve the quality of our product in its original condition.