High-temperature performance: Strength is maintained up to 1200℃ without degradation, and decomposition only begins at 1900℃, far superior to metal materials.
Wear resistance: Hardness is second only to diamond, and surface roughness is superior to steel parts, reducing vibration and noise.
Chemical stability: Excellent corrosion resistance to most acids, bases, and molten salt media.
Coefficient of Thermal Expansion: 3.2 × 10⁻⁶/K.
Introduction to T-type Silicon Nitride Threaded Products
T-type silicon nitride threaded products are special industrial components made from silicon nitride (Si₃N₄) ceramic material, belonging to the category of advanced structural ceramic products. Silicon nitride ceramic is an atomic crystal material with the following significant characteristics:
1. Mechanical Properties: Bending strength can reach 600-800 MPa, Vickers hardness up to 2200, Mohs hardness 9-9.5 (second only to diamond), and elastic modulus 28420-46060 MPa.
2. Thermal Stability: Oxidation starting temperature is 1300-1400℃, thermal expansion coefficient is only 2.8-3.2 × 10⁻⁶/℃, and it can withstand rapid cooling and heating at 1000℃ without cracking.
3. Corrosion Resistance: Except for hydrofluoric acid, it can withstand most inorganic acids and sodium hydroxide solutions below 30%, and exhibits inertness to molten metals and salt media.
4. Processing Characteristics: The minimum machinable internal thread is M2, external threads are unlimited, dimensional accuracy can reach up to 0.003mm, and surface finish can reach R-grade.
Application Areas
Thanks to its excellent properties, T-shaped silicon nitride threads have a wide range of applications in various industrial fields:
Application areas | Specific use | Advantages demonstrated |
mechanical Engineering | High-speed bearings, sealing rings, permanent molds | High wear resistance, self-lubricating, and extended service life. |
Aerospace | Gas turbine guide vanes, turbine blades | High temperature resistance, high strength, lightweight |
semiconductor | Insulating substrates, heat-treated support components | High thermal conductivity, electrical insulation, and mechanical reliability. |
Chemical equipment | Corrosion-resistant components, reactor parts | Chemically inert, resistant to molten salt corrosion. |
high vacuum environment | Ceramic bearings, seals | Solving the problem of lubricant contamination. |
Supports custom specifications.
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