Carbon Fibre
Origin and history
Carbon fibre as a manufactured material originates from work in the United States in the mid-20th century. Its development was driven by aerospace and military demands for a material combining high strength with low weight. The process of creating high-performance carbon fibres from polyacrylonitrile (PAN) precursor was pioneered at a Royal Aircraft Establishment research centre in the United Kingdom in the early 1960s. This PAN-based process became the dominant commercial method, establishing the foundation for the modern industry. Japanese companies subsequently made critical advancements in the 1970s, improving tensile strength and modulus, which enabled broader industrial adoption. The material transitioned from a specialist aerospace component to more widespread use in sporting goods and automotive applications from the 1980s onward.
What it is for
Carbon fibre is primarily used to create composite materials with exceptional stiffness and strength at a very low weight. Its most prominent application is in structural components where this strength-to-weight ratio is critical, such as in aircraft fuselages, wings, and tail sections. In automotive engineering, it is employed in high-performance vehicles for monocoque chassis, body panels, and interior components to reduce mass and improve handling and efficiency. The material is also fundamental to modern professional sporting equipment, including bicycle frames, tennis rackets, and fishing rods, where it enhances performance through rigidity and light weight. Furthermore, it finds use in industrial applications such as robotic arms, wind turbine blades, and components for medical imaging equipment where precision and reduced inertia are beneficial. On the factory floor, it arrives as woven fabric or pre-impregnated tape (prepreg) and is laid into moulds, often using automated fibre placement machines, before being cured in autoclaves to form final parts.
Pros and cons
It also offers excellent fatigue resistance compared to metals, meaning it can endure repeated stress cycles without degrading, and it does not corrode. A significant drawback is its high cost, driven by expensive precursor materials and energy-intensive, slow manufacturing processes, which limits its use to high-value applications. The material is brittle and exhibits poor impact resistance; it can shatter upon a sharp, concentrated impact rather than denting, and damage is often internal and difficult to detect visually. Many who regret choosing it did so for aesthetic reasons without a genuine performance requirement, absorbing the cost and complexity for marginal benefit, or they underestimated the difficulty and expense of subsequent repair. A common mistake is designing a component as a direct metal replacement without understanding composite anisotropy, leading to premature failure under loads it was not oriented to handle.
Who it suits
Carbon fibre suits industries and applications where performance gains from weight reduction justify a substantial cost premium, most notably in aerospace and motorsport. It is appropriate for manufacturers investing in automated layup and curing infrastructure who require high-volume production of consistent, complex composite parts. The material is well-suited to engineering teams with specialised knowledge in composite design and analysis, who can correctly specify fibre orientation and laminate sequences. It is a logical choice for products where stiffness is the paramount design criterion, such as in precision instruments or high-end sporting equipment where user feedback and control are enhanced. It also suits applications operating in environments that cause metal corrosion, provided the service temperatures remain within the epoxy matrix's limits. Finally, it is suitable for factory investments aimed at vertical integration, where bringing composite part production in-house controls quality and secures supply for a final assembled product.
