The application state of C/ C composites in solid rocket motor nozzle in Japan. The components in鄄
clude a rosetta carbon fabric laminated 2D-C/ C exit cone for satellite apogee boost motor, and 3D-C/ C throat inserts
for solid rocket booster and launch vehicle. The rayon based carbon fiber is adopted to make the 2D-C/ C exit cone.
The 3D-C/ C throat insert, used as the 1st stage of M-V solid rocket launch vehicle, has a dimension of 囟1100 mm in
outer diameter and a density of 1. 95 g/ cm3. The 3D preform is orthogonally weaved in a cylinder structure, and then
densified by a repeating heat isostatic pressure鄄graphitization cycles. Applications of C/ C composites in both solid and
liquid rocket motor nozzle extendable exit cones are future development trend in this area.