Can Fluoroelastomer be used in aerospace applications?

Hey there! As a supplier of fluoroelastomer, I often get asked if fluoroelastomer can be used in aerospace applications. Well, you bet it can! In this blog, I'm gonna dive deep into the world of fluoroelastomer and explain why it's a top - choice material for aerospace.

Let's start with what fluoroelastomer is. Fluoroelastomers are a class of synthetic rubbers that are known for their excellent resistance to heat, chemicals, and fuels. These properties make them stand out from other elastomers in harsh environments.

Key Properties of Fluoroelastomer

Heat Resistance

One of the most important aspects of aerospace applications is the ability to withstand high temperatures. Engines, for example, generate a ton of heat, and any materials used near them need to be heat - resistant. Fluoroelastomers can handle continuous service temperatures up to 200 - 250°C, and in some cases, even higher for short periods. This means that they won't break down or lose their properties when exposed to the extreme heat generated by aerospace engines.

Chemical Resistance

Aerospace vehicles come into contact with a wide range of chemicals, including fuels, hydraulic fluids, and lubricants. Fluoroelastomers have outstanding resistance to these substances. They don't swell, crack, or degrade when in contact with fuels like jet fuel, which is a critical property. If a seal made of a less - resistant material were to swell or break down due to fuel exposure, it could lead to leaks, which are a major safety hazard in aerospace.

Low Compression Set

Compression set refers to the ability of a rubber material to return to its original shape after being compressed. In aerospace, seals and gaskets are often under constant compression. Fluoroelastomers have a low compression set, which means they can maintain a tight seal over long periods. This is crucial for preventing leaks of fluids and gases in various aerospace systems, such as fuel lines and hydraulic systems.

Types of Fluoroelastomers for Aerospace

There are different types of fluoroelastomers, and two of the most common ones used in aerospace are peroxy vulcanized and bisphenol vulcanized fluoroelastomers.

Peroxy Vulcanized Fluororubber Raw Rubber has excellent heat resistance and chemical resistance. It's often used in applications where high - temperature performance is a priority, such as engine seals. The peroxy vulcanization process gives these fluoroelastomers better mechanical properties at high temperatures compared to some other types.

Bisphenol Vulcanized Fluororubber Raw Rubber is another popular choice. It offers good chemical resistance and is known for its processability. This type of fluoroelastomer can be easily molded into different shapes, making it suitable for a variety of aerospace components, including O - rings and gaskets.

Aerospace Applications of Fluoroelastomers

Seals and Gaskets

Seals and gaskets are everywhere in aerospace. They're used in engines, fuel systems, hydraulic systems, and environmental control systems. Fluoroelastomer seals and gaskets ensure that fluids and gases stay where they're supposed to be. For example, in a jet engine, fluoroelastomer seals prevent hot gases from leaking out, which not only improves the engine's efficiency but also enhances safety.

O - rings

O - rings are a type of seal that are widely used in aerospace applications. They're used to seal joints between different components, such as pipes and valves. Fluoroelastomer O - rings can withstand the high pressures and temperatures found in aerospace systems. They provide a reliable and long - lasting seal, which is essential for the proper functioning of various aerospace equipment.

Diaphragms

Diaphragms are used in aerospace for pressure control and actuation. Fluoroelastomer diaphragms can handle the pressure differentials and chemical environments found in aerospace systems. They're flexible enough to move in response to pressure changes while maintaining their integrity.

Challenges and Considerations

While fluoroelastomers have many advantages for aerospace applications, there are also some challenges and considerations.

Cost

Fluoroelastomers are generally more expensive than other types of elastomers. This is due to the complex manufacturing processes and the raw materials used. However, when you consider the long - term benefits, such as reduced maintenance costs and increased safety, the higher upfront cost can be justified.

Processing Difficulties

Processing fluoroelastomers can be more challenging than other rubbers. They require specialized equipment and processing techniques. For example, the vulcanization process needs to be carefully controlled to ensure that the final product has the desired properties. But with the right expertise and equipment, these challenges can be overcome.

Conclusion

So, to answer the question, yes, fluoroelastomer can definitely be used in aerospace applications. Its unique combination of heat resistance, chemical resistance, and low compression set make it an ideal material for seals, gaskets, O - rings, and diaphragms in aerospace vehicles. Whether it's in the engine, fuel system, or hydraulic system, fluoroelastomers play a crucial role in ensuring the safety and performance of aerospace equipment.

If you're in the aerospace industry and looking for high - quality fluoroelastomers for your applications, we're here to help. We have a wide range of fluoroelastomer products, including Peroxy Vulcanized Fluororubber Raw Rubber and Bisphenol Vulcanized Fluororubber Raw Rubber. Reach out to us for more information and to start a procurement discussion. We can work with you to find the best fluoroelastomer solution for your specific aerospace needs.

References

• "Handbook of Elastomers" by B. S. Reddy
• "Aerospace Materials and Processes" by various authors