Silicon nitride parts

Features

1. Low Density: The density is only 3.20 g/cm³ (approximately 40% of bearing steel), resulting in low centrifugal force during high-speed rotation, which significantly increases the speed limit.
2. High Hardness and Strength: Hardness reaches HV10 1480, with high fracture toughness, enabling it to withstand extreme load conditions.
3. High Temperature Resistance: It maintains its original hardness up to 400℃, and its performance only begins to decline above 800℃. It can be used up to 1000℃ (in air) or 1400℃ (in a protective atmosphere).
4. Excellent Thermal Stability: It has a low thermal expansion coefficient (3.2×10⁻⁶/℃), a thermal conductivity of 20-25 W/m·K, and good thermal shock resistance.
5. Self-Lubricating Properties: It has a low coefficient of friction and can be used in environments without lubricating media, reducing friction loss.
6. Chemical Stability: It is resistant to most acids and bases (except hydrofluoric acid and concentrated strong bases).