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vuv-induced degradation of fep teflon aboard ldefExamination of fluorinated ethylene propylene (FEP) copolymer materials recovered from the Long Duration Exposure Facility (LDEF) reveals differing damage characteristics on leading edge (ram-facing) versus trailing edge (wake-facing surfaces). Silver/Teflon (Ag/FEP) thermal control materials on ram facing surfaces of the LDEF exhibited obvious degradation, with an apparent increase in diffuse light scattering, whereas identical materials on the wake facing surfaces showed little apparent damage with cursory inspection. Microscopic examination of both types of surfaces reveals the nature and extent of environment induced degradation of materials. The ram facing surfaces were clearly eroded by atomic oxygen impingement, while the wake facing material developed a thin, highly embrittled surface layer.
Document ID
19910015716
Document Type
Conference Paper
Authors
Brinza, David E.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Liang, Ranty H.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Stiegman, Albert E.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
September 6, 2013
Publication Date
June 1, 1991
Publication Information
Publication: NASA, Langley Research Center, First LDEF Post-Retrieval Symposium Abstracts
Subject Category
NONMETALLIC MATERIALS
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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IDRelationTitle19910015658Analytic PrimaryFirst LDEF Post-Retrieval Symposium abstracts