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Follow-up on the effects of the space environment on UHCRE thermal blanketsAn overview of the effects of the space environment on the thermal blanket of the UHCRE experiment is presented with an emphasis on atomic oxygen (AO) erosion. A more accurate value for FEP Teflon reaction efficiency is given and corresponds, at normal incidence, to 3.24 10(exp -25) cu cm/atomic, therefore, the FEP Teflon erosion corresponding to the Long Duration Exposure Facility (LDEF) total mission is 29.5 microns. A power 1.44 of the cosine of the incident angle of the oxygen atoms is found. It is shown that this value is not far from the power found using Fergusson's relationship between efficiency and energy of the O-atoms. An hypothesis concerning the effect of oxygen ions (O(+)) is also presented. The presence of oxygen ions may explain the different results obtained from different flights and from laboratory tests. Finally an XPS analysis of Chemglaze Z306(tm) black paint demonstrates the presence of silicone in the paint which may explain part of the contamination found on LDEF.
Document ID
19940026513
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Levadou, Francois (European Space Agency. European Space Research and Technology Center ESTEC, Noordwijk, Netherlands)
Vaneesbeek, Marc (European Space Agency. European Space Research and Technology Center ESTEC, Noordwijk, Netherlands)
Date Acquired
September 6, 2013
Publication Date
December 1, 1993
Publication Information
Publication: NASA. Marshall Space Flight Center, LDEF Materials Results for Spacecraft Applications
Subject Category
Nonmetallic Materials
Accession Number
94N31018
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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