High temperature resistance: Maintains strength without degradation at temperatures up to 1200℃, with short-term temperature resistance up to 1400℃.
Thermal shock resistance: Low thermal expansion coefficient (3.2×10⁻⁶/℃), able to withstand drastic temperature changes without cracking.
Abrasion resistance: High hardness and self-lubricating properties, resulting in a low coefficient of friction.
Chemical stability: Resistant to most acids and bases (except hydrofluoric acid and concentrated strong alkalis).
High mechanical strength: Compressive strength can reach over 2000 MPa, and flexural strength is 300-600 MPa.
Product Introduction of Silicon Nitride Ceramic Piston Liners
Silicon nitride ceramic piston liners are high-performance engineering ceramic components made from silicon nitride (Si₃N₄) material. This material possesses excellent properties such as high strength, high hardness, high temperature resistance, and corrosion resistance, making it particularly suitable for use in high-temperature, high-load, and high-wear environments.
Manufacturing Process
1. Forming Process: Dry pressing, isostatic pressing.
2. Sintering Process: Reaction sintering, atmospheric pressure sintering, gas pressure sintering, hot pressing sintering.
3. Machining Accuracy: Up to 0.003mm, with excellent concentricity and parallelism.
Application Fields
1. Automotive Industry: Engine piston rings, cylinder liners, turbochargers, etc.
2. Aerospace: High-temperature components for aircraft engines.
3. Mechanical Engineering: High-load mechanical seals, wear-resistant components.
4. Energy Equipment: Hydraulic system piston rods, pneumatic equipment components.
Technical Parameters
Parameter Name | Numerical range | Remark |
Bulk density | 3.1-3.3 g/cm³ | High-density structure |
Flexural strength | 600-800 MPa | High-strength properties |
Operating temperature | ≤1200℃ (in air) / ≤1400℃ (in protective atmosphere) | High temperature stability |
hardness | Mohs hardness scale: 8.5-9 | Second only to diamond |
Minimum machined inner diameter | 0.04mm | High-precision machining capabilities |
Surface finish | Ra0.03 | Ultra-smooth surface |
Product Advantages Comparison
characteristic | Silicon nitride ceramics | Traditional metal materials |
High temperature resistance | Excellent (≤1200℃) | Normal (≤600℃) |
Wear resistance | excellent | generally |
weight | Light (low density) | Heavier |
Corrosion resistance | Excellent | Poor |
cost | Higher | lower |
Supports custom specifications.
If you have any suggestions or questions, Please free to contact us.
