Patent ID: 7931955

Claim:
A composite material comprising: a hollow substrate material; and at least one barrier coating on an inner side of the hollow substrate material, wherein the at least one barrier coating is a plasma impulse chemical vapor deposition coating, and the at least one barrier coating comprises an alternating layer comprising an inorganic titanium oxide layer in contact with the hollow substrate material, an inorganic silicon oxide layer in contact with the inorganic titanium oxide layer, a second inorganic titanium oxide layer in contact with the inorganic silicon oxide layer, and a second inorganic silicon oxide layer in contact with the second inorganic titanium oxide layer, wherein the at least one barrier coating further comprises a layer of a material selected from the group consisting of: amorphous hydrocarbons, Nb x O y with 0<x<2, 0<y<5, and any combinations thereof.