The atomic oxygen erosion yields of various materials, measured in terms of volume of material oxidized per incident oxygen atom, are sometimes very different for materials exposed in ground-based atomic oxygen facilities compared to those exposed in low Earth orbit (LEO) for the same materials. This difference has often been attributed to a synergistic reaction between atomic oxygen and vacuum ultraviolet radiation present in many ground-based atomic oxygen facilities. Energy and presence of charged species has also been thought to play a role in this observed difference in erosion yield. Using an isotropic thermal energy atomic oxygen source and a hyperthermal atomic oxygen directed beam, an attempt was made to isolate each of these factors for polyimide Kapton HN, polyethylene, and FEP Teflon to determine the sensitivity of the erosion yield to each factor. It was found that each polymer appears to have atomic oxygen synergistic effects with different components of the environment. Isolating each environmental component to determine the important component for a particular material is an important step in enabling better durability prediction using ground-based facilities. Ground testing using the expected space environment components and the development of correlation factors to better relate the ground test to a particular mission environment are important to project in-space material durability.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Investigation into the differences between atomic oxygen erosion yields of materials in ground-based facilities and LEO


    Weitere Titelangaben:

    Untersuchung zu den Unterschieden der Erosionsausbeuten von Werkstoffen bei Einwirkung von atomarem Sauerstoff zwischen Anlagen auf der Erdoberfläche und auf einer niedrigen Erdumlaufbahn


    Beteiligte:


    Erscheinungsdatum :

    2008


    Format / Umfang :

    12 Seiten, 8 Bilder, 12 Quellen




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Investigation into the Differences in Atomic Oxygen Erosion Yields of Materials in Ground Based Facilities Compared to Those in LEO

    Miller, S. / Banks, B. / Waters, D. et al. | British Library Conference Proceedings | 2006



    Comparison of Atomic Oxygen Erosion Yields of Materials at Various Energies and Impact Angles

    Banks, B. / Waters, D. / Thorson, S. et al. | British Library Conference Proceedings | 2006



    Atomic Oxygen Erosion Consideration for Spacecraft Materials Selection

    Whitaker, A. F. / Kamenetzky, R. R. / National Aeronautics and Space Administration | British Library Conference Proceedings | 1994