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Silicon Nitride Fasteners
Purity: ≥99%
Silicon Nitride Fasteners are high-performance ceramic bolts, nuts, and screws made from Si₃N₄, designed for demanding applications where conventional metal fasteners fall short. These components offer excellent thermal resistance, electrical insulation, and mechanical strength, making them suitable for semiconductor equipment, aerospace systems, and high-end automotive applications. Their resistance to corrosion and thermal shock ensures stable performance in extreme environments. We can supply high-quality silicon nitride fasteners with various specifications and competitive prices, offering customized solutions to meet specific requirements.
Or email us at sales@heegermaterials.com.Silicon Nitride Fasteners Data Sheet
| Reference Code: | HM2568 |
| Purity: | ≥99% |
| Color: | Black |
| Chemical Formula: | Si3N4 |
| Material Grades: | HMSN1000, HMSN2000, HMSN3000, HMSN4000 |
| Density: | 3.20 g/cm3 |
| Dimension: | customized |
| Shape: | Hex head, flat head, custom threading, etc. |
| Type: | Bolts, screws, nuts, washers, studs, etc. |
Silicon Nitride Fasteners Description
Silicon nitride fasteners offer a unique combination of lightweight structure, high hardness, and exceptional dimensional stability under extreme temperatures. Unlike traditional metal fasteners, they remain reliable in corrosive, high-heat, and high-vacuum environments. These ceramic fasteners are ideal for applications where thermal insulation and mechanical reliability are critical, such as electronic assembly, plasma systems, and specialty manufacturing equipment.
Silicon Nitride Fasteners Features
- High Mechanical Strength and Wear Resistance: Silicon nitride fasteners exhibit exceptional hardness and durability, allowing them to withstand heavy mechanical loads and abrasive conditions.
- Excellent High-Temperature Performance: Silicon nitride fasteners remain stable and reliable at temperatures up to 1200°C, making them suitable for extreme thermal environments.
- Superior Chemical Resistance: Silicon nitride fasteners resist corrosion from acids, alkalis, and other harsh chemicals, ensuring long-term integrity in aggressive settings.
- Precision Dimensional Stability: Silicon nitride fasteners are manufactured with tight tolerances, providing consistent fit and performance in high-precision assemblies.
- Electrical Insulation and Thermal Conductivity: Silicon nitride fasteners combine electrical insulation with good thermal management, making them effective in electronic and high-voltage systems.
Silicon Nitride Fasteners Applications
- Semiconductor Equipment: Used as durable, heat-resistant fasteners in semiconductor manufacturing tools where stability under high temperatures is critical.
- Aerospace Components: Applied in spacecraft and aircraft assemblies that require lightweight, thermally stable, and corrosion-resistant fastening solutions.
- High-Performance Automotive Systems: Employed in engine and exhaust environments to withstand extreme heat and chemical exposure.
- Electrical and Thermal Management Devices: Serve as insulating and structurally reliable fasteners in high-voltage or thermally sensitive systems.
- Chemical Processing Equipment: Used in corrosive environments where conventional metal fasteners may fail, ensuring long-term reliability.
Silicon Nitride Material Properties
Silicon Nitride Material Grades
HMSN1000 is produced through a gas over-pressure sintering technique, which is widely recognized for enabling the manufacture of high-strength silicon nitride parts with intricate shapes. The process starts with a silicon nitride powder blend that includes sintering additives—such as yttria, magnesium oxide, or alumina—to create a liquid phase during sintering, as well as binders to enhance the structural integrity of the pre-sintered form. After shaping the powder into the desired geometry and performing any necessary green machining, the components are densified in a nitrogen-pressurized furnace. This environment ensures proper consolidation while minimizing material loss due to evaporation or decomposition of silicon, nitrogen, and the additive elements.
Common Uses
- Components for aerospace systems
- Rolling and sliding elements in bearing units
- High-durability parts for internal combustion engines
- Tools and accessories for casting and metal processing
- Structural parts in mechanical assemblies
- Biocompatible elements for medical devices
HMSN2000 is manufactured using a hot pressing technique, where silicon nitride powder is compacted under high pressure and elevated temperature simultaneously. This method relies on specialized equipment, including precision dies and uniaxial presses. The result is a dense ceramic with outstanding strength and durability. However, the process is best suited for forming basic geometries due to the limitations of the equipment. Since components cannot be machined in the pre-sintered (green) state, all post-processing must be done through diamond grinding, which is both time-consuming and costly. As a result, this method is generally reserved for small-scale production of straightforward parts where premium material performance is required.
Common Uses
- Structural parts in aircraft and spacecraft systems
- Equipment and piping components in chemical processing industries
- Friction-resistant elements for engines
- Tools and wear parts used in metal casting environments
- Load-bearing and precision parts in industrial machinery
- Specialized pieces in medical and dental instruments
HMSN3000 utilizes the Hot Isostatic Pressing (HIP) process, where silicon nitride powder is compacted under both high pressure and high temperature. The material is placed in a chamber that is pressurized with inert gas, subjecting the component to uniform pressure from all sides at up to 2000 bar while it is simultaneously heated. This method helps to remove any residual porosity or defects during the sintering process, resulting in a material with a density close to its theoretical maximum. While HIP significantly improves the mechanical properties, durability, and overall reliability of the material, the high cost and complexity of the process limit its use to highly specialized applications.
Common Uses
- Components for aerospace and defense industries
- Precision bearing applications, especially in high-performance environments
- Equipment and components in chemical processing and industrial plants
- Engine parts subjected to extreme wear and thermal stress
- Foundry tools and wear-resistant components
- High-performance parts for mechanical engineering systems
- Medical components requiring high strength and biocompatibility
HMSN4000 is produced through an extruded gas over-pressure sintering process, where silicon nitride powder is blended with sintering additives, such as yttria, magnesium oxide, and/or alumina, to facilitate liquid-phase sintering. Additionally, binders are incorporated to enhance the mechanical properties of the green ceramic structure. The extrusion process helps form the material into the desired shape, and the parts are then subjected to gas over-pressure sintering in a controlled environment. This method ensures uniform density and superior mechanical performance, making it ideal for high-performance applications.
Common Uses
- Aerospace industry components
- Bearings used in high-performance machinery
- Equipment for chemical plants and industrial processing
- Wear-resistant parts for engines
- Components used in foundry operations
- Parts for mechanical engineering systems
- Medical-grade components for high-precision instruments
Silicon Nitride Ceramic Machining
Silicon nitride can be machined in green, biscuit, or fully sintered forms, each with different machining properties. In green or biscuit states, it is easier to shape into complex forms, but the material shrinks about 20% during sintering, affecting dimensional accuracy. For tight tolerances, fully sintered silicon nitride must be machined using diamond tools, a precise but costly process due to the material’s hardness and toughness.
Machining Methods and Considerations:
- Green or Biscuit Machining: Easier to machine into complex shapes but lacks final dimensional accuracy.
- Sintering Shrinkage: The material shrinks approximately 20% during the sintering process, affecting post-sintering dimensions.
- Tight Tolerances: For precise dimensions, post-sintered material must be machined using diamond tools.
- Diamond Grinding: This technique involves the use of diamond-coated tools or wheels to abrade the material and achieve the desired shape.
- Cost and Time: Machining fully dense silicon nitride is a slow, expensive process due to the hardness and toughness of the material.
Silicon Nitride Ceramic Packaging
Silicon nitride ceramic products are typically packaged in vacuum-sealed bags to prevent moisture or contamination and wrapped with foam to cushion vibrations and impacts during transport, ensuring the quality of products in their original condition.
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