Silicon Nitride Shaft Product Introduction
Silicon nitride (Si₃N₄) shafts are high-performance engineering ceramic products with the following significant characteristics:
1. High strength and high hardness: Vickers hardness HV0.5 ≥ 1550, bending strength ≥ 600 MPa, fracture toughness ≥ 6.0 MPa·m¹/².
2. Excellent wear resistance: Friction coefficient as low as 0.02-0.04 (under dry friction conditions), with self-lubricating effect.
3. High temperature resistance: Can operate stably in high-temperature environments up to 1200°C.
4. Low density: Density is approximately 40% of steel, suitable for lightweight applications.
5. Corrosion resistance: Excellent corrosion resistance to a variety of chemical media.
Application Fields
1. Aerospace: Used in high-temperature and high-pressure environments such as engine components and combustion chambers.
2. Precision Instruments: Improves operating accuracy and stability, and reduces mechanical vibration and noise.
3. Automotive Manufacturing: Improves engine efficiency and lifespan, and reduces fuel consumption.
4. Energy Equipment: Key components for wind turbines, nuclear power plants, etc.
5. Chemical Equipment: Corrosion-resistant bushings, pumps, valves, etc.
6. Medical Devices: High-precision, low-noise components for medical equipment.
Technical Parameters
Performance indicators | Parameter value | Remark |
Vickers hardness | ≥1550 HV | It is 1.5 times harder than cemented carbide. |
Flexural strength | ≥600 MPa | Capable of withstanding dynamic loads up to 200 MPa. |
fracture toughness | ≥6.0 MPa·m¹/² | Three times higher than alumina ceramics. |
Coefficient of thermal expansion | 3.2×10⁻⁶/℃ | Similar to silicon-based materials |
coefficient of friction | 0.02-0.04 | Under dry friction conditions |
Operating temperature | ≤1200°C (in air) | ≤1400°C (protective atmosphere) |
Supports custom specifications.
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