What is the composition of Reinforced Carbon-Carbon (RCC) panels?

Answer

Carbon fibers impregnated with a silicon carbide matrix.

RCC is specifically described as a composite material formed by infusing carbon fibers with a silicon carbide matrix to achieve extreme heat resistance.

What is the composition of Reinforced Carbon-Carbon (RCC) panels?
Aerospaceaeronauticsheat shieldthermal protection systemreentry vehicle