Abstract In this study, a thermochromic VO2 coating, which has been studied for spacecraft smart thermal radiator application, was exposed to a ground-based atomic oxygen flux to determine the potential effects of space environment on its performance. The coating sample was prepared using laser ablation deposition technique. Atomic oxygen exposure experiment was conducted on the samples for equivalent 6 months and 3 years in typical LEO environment. Mass loss of the coating samples due to atomic oxygen exposure was measured. Characterization of total hemispherical emittance of the coating before and after atomic oxygen exposure indicates that the atomic oxygen erosion affects the thermal-optical performance of the coating to an extent. X-ray photoelectron spectroscope (XPS) analysis of the coating samples was performed and an increase in the oxygen concentration in outermost layer of the coating due to the atomic oxygen exposure was identified. Possible mechanism for the change in thermo-optical property of the coating was discussed.
THE STUDY OF THE EFFECTS OF ATOMIC OXYGEN EROSION ON THE MICROSTRUCTURE AND PROPERTY OF VO2 THERMOCHROMIC COATING USING CSA’S SPACE SIMULATION APPARATUS
2006-01-01
10 pages
Article/Chapter (Book)
Electronic Resource
English
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