Abstract

In the Low Earth Orbit (LEO) environment where some of the spacecraft would be located, surfaces will be exposed to potentially damaging environmental conditions including atomic oxygen (AO), solar ultraviolet (UV) radiation, charged particles, thermal cycling, and so on. It is necessary to utilize ground-based tests to determine how these environmental conditions would affect the properties of candidate spacecraft materials. Differences between the results of ground-based and on-orbit materials tests are generally not reproduced in the ground test. While some progress had been made for AO reactions in the presence of UV, or energetic-electron bombardment; little has been done to study AO reactions combined with thermal cycling. It was to remedy this deficiency that the work in the paper was undertaken.

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