Recession of organic-polymer-based surfaces due to oxidation by atomic oxygen, the major component of the LEO environment, was studied in Space Shuttle flights 5, 8, and 41-G to measure reaction rates and the effects of various parameters on reaction rates. Surface recession on the flights indicates reaction rates of 3 x10 to the minus 24th power cc atom for unfilled organic polymers. Application of these rates to Space Station-type exposure for main structural items indicates that as much as 0.075 cm of surface recession occurs in 30 yr. Because of the importance of this effect on Space Station systems, additional experiments are planned to obtain better reaction rate measurements ensuring and adequate data base for Space Station design.
Effects of the Low Earth Orbital environment on spacecraft materials
1985-11-01
Aufsatz (Konferenz)
Keine Angabe
Englisch