NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Radiation Induced Degradation of White Thermal Control PaintThis paper details a comparison analysis of the zinc-oxide pigmented white thermal control paints Z-93 and Z-93P. Both paints were simultaneously exposed to combined space environmental effects and analyzed using an in-vacuo reflectance technique. The dose applied to the paints was approximately equivalent to 5 yr in a geosynchronous orbit. This comparison analysis showed that Z-93P is an acceptable substitute for Z-93. Irradiated samples of Z-93 and Z-93P were subjected to additional exposures of ultraviolet (UV) radiation and analyzed using the in-vacuo reflectance technique to investigate UV activated reflectance recovery. Both samples showed minimal UV activated reflectance recovery after an additional 190 equivalent Sun hour (ESH) exposure. Reflectance response utilizing nitrogen as a repressurizing gas instead of air was also investigated. This investigation found the rates of reflectance recovery when repressurized with nitrogen are slower than when repressurized with air.
Document ID
19990040482
Acquisition Source
Marshall Space Flight Center
Document Type
Conference Paper
Authors
Edwards, D. L.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Zwiener, J. M.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Wertz, G. E.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Vaughn, Jason A.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Kamenetzky, Rachel R.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Finckenor, M. M.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Meshishnek, M. J.
(Aerospace Corp. El Segundo, CA United States)
Date Acquired
August 19, 2013
Publication Date
February 1, 1999
Publication Information
Publication: 20th Space Simulation Conference: The Changing Testing Paradigm
Subject Category
Nonmetallic Materials
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
No Preview Available