PEEK (Polyetheretherketone) is a high-performance engineering polymer renowned for its exceptional mechanical strength, thermal resistance, and chemical stability. As a result, PEEK is widely used across advanced scientific and industrial sectors. One of the more specialised applications of PEEK fasteners - including screws, nuts, bolts, and washers - is within the highly demanding environment of the Diamond Light Source: the UK’s national synchrotron facility located in Harwell, Oxfordshire.
The Role of the Diamond Light Source
The Diamond Light Source operates as a particle accelerator that generates intense light beams ranging from infrared to X-rays. These light beams are directed along beamlines - 33 in total - where researchers conduct experiments that investigate the structure and behaviour of materials at an atomic and molecular level. These materials include everything from proteins and metals to ceramics, polymers, and fossils.
Due to the highly controlled, high-energy environments required for this research, all components within the beamlines must be manufactured to withstand extreme conditions. This is where the unique properties of PEEK fasteners come into play.
Applications of PEEK Fasteners in Beamlines
PEEK screws, bolts, nuts, and washers can be used in several locations within the Diamond Light Source’s beamlines. These include the optical systems, where components such as lenses, mirrors, filters, and detectors must be precisely secured in place. Additionally, fasteners are needed in experimental stations to attach sample holders, positioning systems, sensors, and motorised equipment.
In these locations, exposure to vacuum conditions, high radiation, corrosive gases, and elevated temperatures means that conventional metal fasteners may not offer adequate performance over time. PEEK fasteners are capable of operating reliably in such demanding scenarios.
Performance Benefits of PEEK Fasteners
The benefits of PEEK fasteners in synchrotron applications are extensive. Firstly, PEEK’s high melting point of 343°C and its ability to maintain mechanical integrity up to 260°C makes it ideal for environments involving intense heat. Where metal fasteners might deform or fail, PEEK continues to perform.
Another key advantage is PEEK’s low thermal conductivity and low coefficient of thermal expansion. This means that components fastened with PEEK are less likely to suffer from thermal stress or distortion due to temperature fluctuations - critical when exact positioning and stability are required for experimental accuracy.
PEEK also exhibits strong resistance to radiation and corrosive chemicals, including acidic and alkaline gases often present in beamline environments. Unlike metals, which may corrode or degrade, PEEK maintains its properties even after long exposure to radiation and aggressive agents.
Finally, PEEK’s lightweight nature contributes to overall system efficiency. With a high strength-to-weight ratio, these polymer fasteners reduce structural load without compromising mechanical performance - an important consideration in highly engineered scientific instruments.
Conclusion
In a facility as complex and technically demanding as the Diamond Light Source, the choice of fastening components plays a vital role in maintaining precision, stability, and durability. PEEK screws, bolts, nuts, and washers offer an advanced solution for securing components in high-temperature, high-radiation, and chemically aggressive environments. Their outstanding thermal, mechanical, and chemical properties make them a natural choice for beamline applications where traditional metal fasteners may fall short. By choosing PEEK, engineers and scientists at the Diamond Light Source can ensure reliable performance and long-term resilience in the heart of the UK’s cutting-edge scientific research.