Optimization of weave of carbon fabric for best combination of strength and tribo-performance of polyetherimide composites in adhesive wear mode

Studies are focused on the composites using carbon fabric (CF) as a reinforcement and high performance thermoplastic polyetherimide (PEI) as a matrix. Based on impregnation technique three composites viz. P, T and S were fabricated using three different weaves viz. plain (P′), twill (T′) and satin 4H (S′), respectively, keeping the fabric content constant (55% by vol.). Apart from evaluating physical and mechanical properties of these composites, friction and wear performance in dry adhesive wear mode was investigated on a pin-on-disc machine under various loads at room temperature as well as at high temperature (90 °C) against mild steel disc. It was observed that the CF reinforcement proved significantly beneficial for enhancing strength and modulus properties. These properties of the composites followed the order; T ≫ S > P while friction and wear performance followed an order; T > P > S. Thus, twill weave proved to be the most suitable for best possible combination of strength, modulus and tribo-performance. SEM studies on worn pin surfaces proved helpful in understanding wear mechanisms.