High Precision Wear-resistant Silicon Nitride Ceramic Shaft

Overview of Silicon Nitride Ceramic Shafts

Silicon Nitride Ceramic Shafts is a high-performance shaft component. It is made of Silicon Nitride Ceramic, which is characterized by high strength and high hardness and can withstand large loads. At the same time, silicon nitride ceramic shafts have good wear resistance and corrosion resistance and can work in harsh environments. Its high-temperature resistance is excellent and can maintain stable mechanical properties. In addition, Silicon Nitride Ceramic Shafts have a low coefficient of friction and high precision and are widely used in aerospace, automotive, machinery and other fields.

Features of Silicon Nitride Ceramic Shafts

Silicon Nitride Ceramic Shafts have the following significant features:

High Strength and Hardness: Silicon Nitride Ceramic Shafts are extremely strong and hard, with its hardness second only to diamond and a few other substances. This makes it able to maintain good stability and wear resistance when subjected to high loads and high speeds, and it is not easy to deform and wear, which can effectively extend the service life.

Good abrasion and corrosion resistance: Silicon nitride ceramic shaft has a smooth surface and low coefficient of friction, which can effectively reduce wear. At the same time, it has excellent corrosion resistance to most acids, alkalis, salts and other chemicals and can work stably in harsh chemical environments.

Excellent high-temperature resistance: Silicon nitride ceramic shaft has excellent high-temperature resistance, can maintain good mechanical properties and dimensional stability in high-temperature environments, and can withstand temperatures as high as 1200℃ or even higher, which makes it suitable for a variety of high-temperature working conditions.

Low density: the density of silicon nitride ceramic shafts is relatively low, much lighter than traditional metal shafts, which helps to reduce the weight of the equipment, improve the operational efficiency and flexibility of the equipment, and has an important application value in the field of aerospace, high-speed trains and other areas with strict requirements on weight.

Good insulation: Silicon Nitride ceramic shafts have good electrical insulation properties, which can effectively avoid current leakage and short-circuit problems, and are widely used in some equipment with special requirements on electrical performance.

Specifications table of Silicon Nitride Ceramic Shafts

Property	Typical Value
Material	Si₃N₄
Density	3.1 – 3.3 g/cm³3
Color	Gray, gray – black
Hardness	Mohs 9 or above, HRA 92 – 94
Max. Service Temperature	1200 – 1600 °C
Thermal Conductivity	23 – 27 W/(m·K)2
Bending Strength	≥900 MPa
Fracture Toughness	6 – 8 (MPa·m¹/²)
Thermal Expansion Coefficient (0 – 1400 °C)	2.95 – 3×10⁻⁶/°C
Dielectric Strength	20 kV/mm2
Max. Manufacturable Size	Length ≤ 1200 mm, diameter ≤ 300 mm, thickness ≤ 50 mm

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Applications of Silicon Nitride Ceramic Shafts

Silicon Nitride Ceramic Shafts have a wide range of applications due to their excellent properties:

Aerospace: The requirements for material properties in this field are extremely stringent. The low density of silicon nitride ceramic shafts helps to reduce the overall weight of the aircraft and improve fuel efficiency and range; its high strength, high hardness and high-temperature resistance can ensure that the aviation engine and other key components to withstand the harsh conditions of high speed, high loads, and extreme temperatures, to protect the flight safety and efficient operation of the engine.

Automotive industry: In the valve system and turbocharger of automobile engines, silicon nitride ceramic shafts are able to withstand high temperatures and high speeds, reduce friction loss, improve the thermal efficiency and power output of the engine, and at the same time, reduce wear and tear and extend the service life of the engine.

Industrial machinery field: In high-speed machine tools, textile machinery and other equipment, the high precision and low coefficient of friction of silicon nitride ceramic shafts can realize precise transmission and efficient operation and improve processing accuracy and product quality.

In the field of electronics industry: In semiconductor manufacturing equipment, the good insulating properties and high-precision rotary performance of silicon nitride ceramic shafts make them an ideal choice for transmission parts in key equipment such as ion implanters and photolithography machines, which helps to improve the manufacturing precision and quality of semiconductor devices.

Company Profile

RBOSCHCO is a trusted global chemical material supplier & manufacturer with over 12 years of experience in providing super high-quality chemicals and Nanomaterials. The company exports to many countries, such as the USA, Canada, Europe, UAE, South Africa, Tanzania, Kenya, Egypt, Nigeria, Cameroon, Uganda, Turkey, Mexico, Azerbaijan, Belgium, Cyprus, Czech Republic, Brazil, Chile, Argentina, Dubai, Japan, Korea, Vietnam, Thailand, Malaysia, Indonesia, Australia, Germany, France, Italy, Portugal etc. As a leading nanotechnology development manufacturer, RBOSCHCO dominates the market. Our professional work team provides perfect solutions to help improve the efficiency of various industries, create value, and easily cope with various challenges. If you are interested, please send an email to sales1@rboschco.com

Payment Term

T/T, Western Union, Paypal, Credit Card etc.

Shipment Term

By air, by sea, by express, as customers request.

5 FAQs of Silicon Nitride Ceramic Shafts

Disadvantages of silicon nitride ceramic shaft and countermeasures?

High brittleness: weak impact resistance, need to avoid collision. Solution: Gradient porosity design with a dense surface layer and cushioned core.

Difficult to process: High hardness leads to low processing efficiency, and grinding time is more than 50 times that of steel balls. Solution: Use of diamond grinding wheels and laser microstructuring technology.

High cost: the HIP process is 3-5 times more expensive than the normal process. Solution: Scale production to reduce the unit cost and accelerate the domestic substitution (e.g., Sinoma Hi-Tech, Jiangsu Lixing).

Q2:How to maintain the silicon nitride ceramic shaft?

Installation: Avoid knocking; use uniform pressure assembly to prevent surface damage.

Lubrication: low viscosity lubricant can be used in high-speed operation, and self-lubrication can meet the demand in normal working conditions.

Cleaning: Regularly use gasoline or special cleaning agents to remove adhesions and prevent increased wear.

Temperature control: avoid sudden cooling and heating to prevent thermal stress cracking; the working temperature is recommended to be ≤1000℃.

Q3:What is the market prospect of silicon nitride ceramic shaft?

Growth driver: Increasing penetration rate of new energy vehicles (38.6% by 2024), demand for HIP silicon nitride bearing balls will increase by more than 20% annually.

Technology trends: nano-composite, 3D printing and other technologies to improve the toughness of materials, intelligent monitoring systems (such as vibration sensors) to improve reliability.

Q4: How environmentally friendly are silicon nitride ceramic shafts?

Production: Non-toxic raw materials are used; some processes (e.g., HIP) consume more energy, but the product has a long life, reducing the frequency of replacement.

Recycling: Ceramic materials are difficult to degrade and need professional recycling treatment; currently, the main recycling powder is through physical crushing.

Q5: What are the typical failures and causes of silicon nitride ceramic shafts?

Fracture: impact load or thermal stress is too large, need to optimize the structural design.

Wear: Insufficient lubrication or intrusion of foreign matter, regular cleaning and inspection of seals.

Corrosion: Long-term exposure to strong acids and alkalis, choose a corrosion-resistant coating (e.g., SiC).