ATOMIC OXYGEN PROTECTION TECHNOLOGIES FOR SPACECRAFT SURFACE MATERIALS

At altitudes between 200 km and 700 km，atomic oxygen（AO）is the most abundant atmospheric species that，being highly reactive.It is now well established that the interaction between atomic oxygen in the low-Earth-orbit（LEO）space environment and spacecraft at orbital velocities causes severe mass loss from solar array materials，thermal control materials and optical materials，etc.Atomic-Oxygen-Protection technology is important for guarantee materials or components against atomic oxygen.This paper introduced atomic oxygen protection technologies and methods.