Here are some innovations in the production of lightweight materials for aircraft ¹ ²:

- *RAU-FLIGHT PA*: A polyamide material developed by REHAU, which offers a weight reduction of up to 10% in aircraft construction components. This material has the mechanical properties of the approved basic materials and can be specially adapted to customer requirements.

- *Carbon Fiber Reinforced Polymers (CFRP)*: A lightweight material that has been increasingly used in airframes and engine parts to reduce aircraft fuel consumption. CFRP has a minimum yield strength of 550 MPa, but its density is 1/5 of steel and 3/5 of Al-based alloys.

- *Metal Matrix Composites (MMCs)*: Composites made from metals and ceramics. They have a higher specific stiffness, specific strength, thermal stability, wear resistance, and high-temperature stability compared to conventional Ti-alloys. MMCs are used in aircraft landing gear, high-pressure seals, and seats.

- *Ceramic Matrix Composites (CMCs)*: Composites made from ceramic fibers and matrices. They have low densities, high-temperature resistance, and higher fracture toughness compared to monolithic ceramics. CMCs are used in nozzles, combustion chambers, turbine stators, and other hot sections of aero-engines.

- *Aluminum-Based MMCs*: Composites made from aluminum and ceramic fibers. They have improved performance compared to conventional Al alloys and are used in airframes, landing gear, and other aircraft components.

- *Magnesium (Mg)-Based MMCs*: Composites made from magnesium and ceramic fibers. They have improved mechanical properties, corrosion resistance, and high-temperature stability. Mg-based MMCs are used in aircraft structures, engine components, and other applications.

- *Titanium (Ti)-Based MMCs*: Composites made from titanium and ceramic fibers. They have high strength, stiffness, and resistance to corrosion and fatigue. Ti-based MMCs are used in aircraft landing gear, engine components, and other high-performance applications.