SiC Fiber Unveiled: Properties, Production, and Pioneering Applications

SiC Fiber Unveiled: Properties, Production, and Pioneering Applications

Understanding SiC Fiber: Properties and Applications

What is SiC Fiber?

Silicon carbide fiber is an inorganic fiber with a β-silicon carbide structure and belongs to the ceramic fiber category.

It is made of organic silicon compounds as raw materials through processes such as spinning, carbonization or vapor deposition. This fiber material has many outstanding properties, such as high temperature stability, high strength, high modulus and excellent chemical stability.

SiC Fiber Unveiled: Properties, Production, and Pioneering Applications

What are the Properties of SiC Fiber?

Silicon carbide fiber performs really well.

Firstly, it has great high-temperature stability and keeps its crystaline structure and performance at very high temperature, which makes it much more widely used in high-temperature field.

Secondly, silicon carbide fiber also has the characteristics of high strength and high modulus, which means that it is very strong and not easy to deform, and can withstand large forces and stresses.

In addition, silicon carbide fiber also has excellent chemical stability, has good resistance to a variety of chemicals, and is not susceptible to corrosion or erosion.

What are the Applications of SiC Fiber?

Silicon carbide fiber has a wide range of applications.

First of all, in the aerospace field, silicon carbide fiber is often used to manufacture high-temperature components such as engines, pyrolysis reactors, and petrochemical plants due to its excellent high-temperature stability and high-strength properties.

In addition, its use in combination with carbon fiber or glass fiber can significantly enhance the performance of metal and ceramic products, such as jet aircraft brake pads, engine blades, landing gearboxes and fuselage structural materials.

Secondly, silicon carbide fiber is also widely used in the energy field. It can be used as a high-temperature resistant material to make heat shielding materials, high-temperature-resistant conveyor belts, and filter cloths for filtering high-temperature gases or molten metals.

The Applications of Silicon Carbide Fiber

Furthermore, in the chemical industry, silicon carbide fibers also play an important role and are used to manufacture various high-temperature and corrosion-resistant equipment and components.

Further silicon carbide fabrication opportunities include sporting goods. Due to its high melting point, shredded silicon carbide fibres are used in the manufacture of high-temperature furnace building material.

Silicon carbide in electric industry can be use as bodies of arrester valve, silicon carbon electric heating elements and far infrared generator and so on.

In the electronics industry, silicon carbide single crystals can be used as substrates for light-emitting diodes, and high-purity silicon carbide crystals are high-quality materials for manufacturing radiation-resistant, high-temperature semiconductors.

With the continuous development of science and technology, the application fields of silicon carbide fiber are still expanding, and its market demand is also continuing to grow.

In the future, silicon carbide fiber is expected to play a greater role in more fields and make greater contributions to technological progress and social development.

How is SiC Fiber Made?

There are four main methods for making silicon carbide fibers, including powder sintering, activated carbon fiber conversion, chemical vapor deposition and precursor conversion. Below we will compare the four methods.

Activated Carbon Fiber Conversion:

Among them, the activated carbon fiber conversion method is to react the carbon fiber with gaseous silicon oxide to convert the carbon fiber into silicon carbide fiber in situ. This process occurs under certain vacuum conditions, with the temperature controlled at 1200-1300°C, followed by high-temperature annealing in an inert atmosphere, and finally silicon carbide fibers containing β-SiC microcrystals are obtained.

Precursor Conversion:

The precursor conversion rule is to use organic polymers containing carbon and silicon as precursors, shape the polymers into fiber shapes through melt spinning, and pyrolyze them at high temperatures into inorganic fibers containing carbon and silicon elements. This method has relatively mature technology, high production efficiency and low cost, so it is suitable for industrial production.

Silicon carbide Fiber

Chemical Vapor Deposition:

The chemical vapor deposition method uses carbon fiber or tungsten fiber as the matrix, mixes silane compounds with hydrogen, and decomposes at high temperatures to deposit a layer of silicon carbide on the carbon fiber or tungsten wire.

Powder Sintering:

The powder sintering method is to disperse silicon carbide powder in a polymer melt containing sintering aids, and prepare continuous silicon carbide fibers through spinning, pre-sintering and high-temperature sintering.

Each of these methods has its own characteristics. In practical applications, the appropriate method can be selected according to specific needs and conditions.

Advantages of SiC Fiber in Composite Materials

  • High temperature antioxidant properties
  • Insulating properties
  • Flexibility in performance tuning
  • High strength and high modulus
  • Chemical Stability
  • High hardness
  • High thermal stability
  • Low density
  • Corrosion resistance

Conclusion

In conclusion, SiC fiber emerges as a cornerstone in the advancement of materials technology, with its remarkable properties and versatility paving the way for innovations across various sectors. From its exceptional thermal stability and resistance to environmental degradation to its pivotal role in enhancing the performance and longevity of composite materials, SiC fiber stands at the forefront of modern engineering solutions.

If you are looking for silicon carbide products,  contact us to explore our premium products for your industrial application.

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