Silicon Nitride Nut Product Introduction
Silicon nitride (Si₃N₄) is a high-performance structural ceramic material with the following core characteristics:
1. Physical properties: Vickers hardness up to HV10 ≥ 1600, second only to superhard materials such as diamond; excellent fracture toughness (6-7 MPa·m¹/²), bending strength >800 MPa.
2. Thermal properties: High temperature resistance (stable in air up to 1000-1200℃), low thermal expansion coefficient (2.3-3.2 × 10⁻⁶/K), and strong thermal shock resistance.
3. Chemical stability: Corrosion resistance (except to hydrofluoric acid), oxidation resistance, suitable for harsh environments.
Application Fields
Silicon nitride nuts are mainly used in the following applications:
1. Industrial field: Mechanical sealing rings, high-temperature molds, wear-resistant components.
2. High-end manufacturing: Aerospace engine components, high-temperature resistant parts for semiconductor equipment.
3. Special environments: Corrosive chemical environments, high-temperature continuous casting equipment in metallurgy.
Comparison with other materials
characteristic | Silicon nitride | Aluminum oxide | Zirconia | Silicon carbide |
hardness | Very high (HV10 ≥ 1600) | high | Higher | Highest |
fracture toughness | Excellent (6-7 MPa·m¹/²) | Low | High (room temperature) | Low |
High temperature resistance | Up to 1200°C (in air) | Up to 1600℃ | Up to 800℃ (ductility decreases) | Up to 1600℃ |
cost | Higher | Low | medium | high |
Applicable scenarios | High impact, thermal cycling | Low-cost, conventional environment | High toughness required at room temperature. | Extreme hardness requirements |
Supports custom specifications.
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