The main material in detail
Common requirements
One example of the used material can be the follow:
1.) Carbon fibers lying on top of each other all in the same direction.
2.) A resin is added and graphene is also put in the resin.
3.) Sol-gel intermediate layer, e.g. TiO₂/SiO₂
4.) PVD(Physical Vapour Deposition) coating made from Al₂O₃
5.) For Helium tightness add a Parylene-AF4 with a thickness of 5 mikrometer
6.) For lightening protection a aluminium strip can be included or added
Fixed and flexible material
The material must be flexible or fix, to create a fix version, the numbers of the fibers must be increased and the line of the carbon fibers must be changed.