NASA/TM-108518, Edwards, D.L. and Zwiener, J.M. and Wertz, G.E. and Vaughn, J.A. and Kamenetzky, R.R. and Finckenor, M.M. and Meshishnek, M.J., Radiation-Induced Degradation of the White Thermal Control Paints Z-93 and Z-93P, Materials and Processes Laboratory, Science and Engineering Directorate. NASA Marshall Space Flight Center, AL 35812, October 1996, pp. 23, Format(s): PDF 1421k |
This 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 approximatley equivalent to 5 years 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
| Keywords: | radiation, electron, ultraviolet, space environmental effects, thermal control |
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| CASI Document ID Number: | 97N11712 |
| Subjects: | Chemistry and Materials: Non-Metallic Materials: Polymers |
| ID Code: | 354 |
| Deposited On: | 02 July 2002 |