Effects of Vacuum Ultraviolet Radiation on Atomic Oxygen Erosion of Polysiloxane/SiO2 Hybrid Coatings

Polysiloxane/SiO2 hybrid coatings have been prepared on Kapton films by a sol-gel process.The erosion resistance of polysiloxane/SiO2(20 wt pct) coating was evaluated by exposure tests of vacuum ultraviolet radiation(VUV) and atomic oxygen beam(AO) in a ground-based simulation facility.The experimental results indicate that this coating exhibits better AO resistance than pure polysiloxane coating.The erosion yield(Ey) of the polysiloxane/SiO2(20 wt pct) hybrid coating is about 10-27 cm3/atom,being one or tw...