Silicon nitride ceramics with low high-temperature creep

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User: In extreme high temperature and high pressure environments, I need a material that can maintain dimensional stability and mechanical properties for a long time, avoiding component failure due to creep. Is there a solution?
Answer: Silicon nitride ceramics with low high-temperature creep are designed for such challenges. It can solve the core problems you face in aerospace, energy, and industrial manufacturing: dimensional drift, structural instability, and shortened lifespan caused by creep (slow plastic deformation) of materials in high temperature environments above 1300 ° C. Silicon nitride ceramics, through their unique grain boundary design and microstructure, significantly suppress high-temperature creep, ensuring that components maintain high strength and shape integrity under long-term thermo mechanical loads, thereby improving equipment reliability and efficiency.

What is silicon nitride ceramic with low high-temperature creep?
Silicon nitride (Si ∝ N ₄) ceramics are an advanced structural ceramic with a crystal structure dominated by covalent bonds, which endows them with excellent high-temperature stability. By optimizing the sintering process (such as pressure sintering or hot pressing sintering) and adding additives (such as Y ₂ O3, Al ₂ O3), the formation of grain boundary glass phase can be controlled, thereby significantly reducing the creep rate at high temperatures. Its creep performance is usually 1-2 orders of magnitude lower than traditional superalloys, and it can still maintain a bending strength of>500 MPa in the range of 1200-1500 ° C.

Core advantages of the product

1. Excellent high-temperature creep resistance
   Under sustained high temperatures (up to 1500 ° C) and stress loads, the creep strain rate of silicon nitride ceramics is extremely low (can be below 10 ⁻⁸/s), far superior to metals and most oxide ceramics, and suitable for harsh environments with long-term service.
2. Outstanding comprehensive mechanical performance
   -High hardness (Hv ≥ 14 GPa) and wear resistance
   -High fracture toughness (6-8 MPa · m ¹/²)
   -Low thermal expansion coefficient (3.2 × 10 ⁻⁶/K), excellent thermal shock resistance
3. Chemical and thermal stability
   It is inert to most molten metals and corrosive gases, has good oxidation resistance, and can work for a long time in oxidizing or reducing atmospheres.

Application field
-Aerospace: Turbine engine blades, combustion chamber liners, bearing components, reducing weight and improving temperature resistance limits.
-Energy and Chemical Industry: Gas turbine sealing rings and high-temperature heat exchanger components enhance energy conversion efficiency.
-Industrial manufacturing: sintering tools, rollers, glass processing fixtures, extend service life and reduce downtime.
-Semiconductor: wafer processing arm, heat treatment bracket, ensuring dimensional accuracy during high-temperature processes.

Specifications and Customization Services
We provide comprehensive customized solutions to meet diverse needs:
-Size range: from miniature bearing balls (diameter 1-30mm) to large structural components (length ≤ 500 mm, can be designed for splicing).
-Shape complexity: Supports near net forming and can process complex geometric shapes (such as structures with internal cavities and threaded holes).
-Performance regulation: Adjust the microstructure and composition according to the usage temperature, atmosphere, and load conditions, and optimize the creep resistance level.
-Surface treatment: Polishing, coating, or finishing can be provided to meet specific tribological or sealing requirements.

Customer Application Case (Anonymous)
-A certain aerospace company: using our silicon nitride ceramic turbine rotor, it has been continuously operated for more than 5000 hours at 1300 ° C and high speed conditions, with a creep deformation of less than 0.1%, successfully replacing traditional nickel based alloys and reducing weight by 40%.
-New Energy Technology Company: The connecting plate used for high-temperature fuel cells maintains dimensional stability for over 2 years in an oxidation-reduction alternating environment, resulting in a 15% increase in system efficiency.
-Semiconductor equipment manufacturer: As a wafer heat treatment bracket, there is no flatness deviation caused by creep under repeated thermal cycles (room temperature to 1200 ° C), and the product yield is increased by 8%.

Silicon nitride ceramics with low high-temperature creep are your reliable partners for dealing with extreme working conditions. If you have specific working condition requirements or sample testing intentions, please feel free to contact us immediately for customized solutions and procurement support – let us use material science to help you achieve technological breakthroughs!

Brudeze Ceramics supplies and sells a wide range of high-quality quartz glass, including alumina ceramics, zirconia ceramics, silicon nitride ceramics, aluminum nitride ceramics, silicon carbide ceramics, boron carbide ceramics, bioceramics, machinable ceramics, etc. We can meet the customization requirements of various ceramic products.