Extended service life: High wear resistance significantly extends maintenance cycles.
Improved operating efficiency: Low friction coefficient reduces energy loss.
Adaptability to special environments: Stable operation under high temperature, corrosive, and high load conditions.
Precision machining capabilities: Capable of machining complex and irregularly shaped structures with dimensional accuracy up to 0.01mm.
Environmentally friendly and safe: Non-polluting, non-magnetic, and electrically insulating.
Product Introduction of Silicon Nitride Bearing Multi-Groove Polished Shaped Parts
Silicon nitride bearing multi-groove polished shaped parts are high-performance ceramic structural components made from silicon nitride (Si₃N₄) ceramic material, possessing the following significant characteristics:
1.High strength and high toughness: Bending strength > 800 MPa, fracture toughness > 6 MPa·m¹/², capable of withstanding high mechanical and thermal stresses.
2.Superior wear resistance: Vickers hardness reaches Hv 1400-1600, with a low coefficient of friction and self-lubricating properties.
3.Excellent high-temperature performance: Operating temperature can reach 1200°C (in air) to 1400°C (in a protective atmosphere).
4.Chemical stability: Resistant to acid and alkali corrosion, and a protective silicon dioxide layer forms on the surface in an oxidizing atmosphere.
5.Low density: Density is only about 40% of steel (approximately 3.2-3.3 g/cm³), suitable for lightweight applications.
Application Fields
1. Aerospace: High-speed bearings, high-temperature structural components, reducing weight and improving reliability.
2. Precision Instruments: High-precision spindle bearings, reducing vibration and noise.
3. Automotive Manufacturing: Engine components, motor bearings for new energy vehicles.
4. Medical Devices: High-speed centrifuge bearings, with good biocompatibility.
5. Chemical Equipment: Corrosion-resistant pumps, valves, and seals.
6. Energy Sector: Wind power generation bearings, reducing maintenance costs.
Technical Parameters
Performance indicators | Reference values | Remark |
Bending strength | >800 MPa | It can reach over 1000 MPa. |
fracture toughness | >6 MPa·m¹/² | Superior to most ceramic materials. |
Vickers hardness | Hv 1400-1600 | Approaching the hardness of diamond. |
Coefficient of thermal expansion | ~3.2×10⁻⁶/K | Good compatibility with metal materials. |
Thermal conductivity | 20-30 W/m·K | Good compatibility with metal materials. |
Surface roughness | Ra≤0.2μm | After precision polishing |
Operating temperature | In air, ≤1200°C | Protective atmosphere, ≤1400°C |
Supports custom specifications.
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