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Comparison of Atomic Oxygen Erosion Yields of Materials at Various Energy and Impact AnglesThe atomic oxygen erosion yields of various materials, measured in volume of material oxidized per incident atomic oxygen atom, are compared to the commonly accepted standard of Kapton H (DuPont) polyimide. The ratios of the erosion yield of Kapton H to the erosion yield of various materials are not consistent at different atomic oxygen energies. Although it is most convenient to use isotropic thermal energy RF plasma ashers to assess atomic oxygen durability, the results can be misleading because the relative erosion rates at thermal energies are not necessarily the same as low Earth orbital (LEO) energies of approx.4.5 eV. An experimental investigation of the relative atomic oxygen erosion yields of a wide variety of polymers and carbon was conducted using isotropic thermal energy (approx.0.1 eV) and hyperthermal energy (approx.70 eV) atomic oxygen using an RF plasma asher and an end Hall ion source. For hyperthermal energies, the atomic oxygen erosion yields relative to normal incident Kapton H were compared for sweeping atomic oxygen arrival with that of normal incidence arrival. The results of isotropic thermal energy, normal incident, and sweeping incident atomic oxygen are also compared with measured or projected LEO values.
Document ID
20060047719
Document Type
Technical Memorandum (TM)
Authors
Banks, Bruce A.
(NASA Glenn Research Center Cleveland, OH, United States)
Waters, Deborah L.
(QSS Group, Inc. Cleveland, OH, United States)
Thorson, Stephen D.
(Wisconsin Univ. Madison, WI, United States)
deGroh, Kim, K.
(NASA Glenn Research Center Cleveland, OH, United States)
Snyder, Aaron
(NASA Glenn Research Center Cleveland, OH, United States)
Miller, Sharon
(NASA Glenn Research Center Cleveland, OH, United States)
Date Acquired
August 23, 2013
Publication Date
August 1, 2006
Subject Category
Engineering (General)
Report/Patent Number
E-15639
NASA/TM-2006-214363
Meeting Information
10th International Symposium on Materials in a Space Environment (ISMSE)(Collioure)
Funding Number(s)
WBS: WBS 515-01-15-03
Distribution Limits
Public
Copyright
Public Use Permitted.

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