TY - GEN
T1 - Synergistic effect of simulated hypervelocity space debris and atomic oxygen on durability of POSS-polyimide nanocomposite
AU - Verker, R.
AU - Grossman, E.
AU - Gouzman, I.
AU - Laikhtman, A.
AU - Katz, S.
AU - Freankel, M.
AU - Maman, S.
AU - Lempert, G.
AU - Eliaz, N.
PY - 2006/9
Y1 - 2006/9
N2 - The combined effect of hypervelocity space debris impacts and atomic oxygen (AO) on the fracture of polyimide films reinforced with polyhedral oligomeric silsesquioxanes (POSS) was studied. A laser-driven flyer (LDF) system was used to accelerate aluminum flyers to impact velocities of up to 3 km/s, and the impacted films were exposed to an RF plasma AO source. Scanning electron microscopy (SEM) was used to characterize the fracture morphology. The extent of damage in POSS-polyimide impacted films was found to be much smaller compared to POSS-free films, insinuating on a toughening mechanism developed due to POSS incorporation. When exposed to AO, the impacted POSS-free film revealed synergistic effect associated with a large increase in the erosion rate, while impacted POSS-containing samples showed improved resistance toward AO. The increased erosion rate of the impacted POSS-free film is explained by formation of residual stresses that affect the oxidation mainly by increasing the diffusivity of oxygen.
AB - The combined effect of hypervelocity space debris impacts and atomic oxygen (AO) on the fracture of polyimide films reinforced with polyhedral oligomeric silsesquioxanes (POSS) was studied. A laser-driven flyer (LDF) system was used to accelerate aluminum flyers to impact velocities of up to 3 km/s, and the impacted films were exposed to an RF plasma AO source. Scanning electron microscopy (SEM) was used to characterize the fracture morphology. The extent of damage in POSS-polyimide impacted films was found to be much smaller compared to POSS-free films, insinuating on a toughening mechanism developed due to POSS incorporation. When exposed to AO, the impacted POSS-free film revealed synergistic effect associated with a large increase in the erosion rate, while impacted POSS-containing samples showed improved resistance toward AO. The increased erosion rate of the impacted POSS-free film is explained by formation of residual stresses that affect the oxidation mainly by increasing the diffusivity of oxygen.
UR - http://www.scopus.com/inward/record.url?scp=33845767454&partnerID=8YFLogxK
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AN - SCOPUS:33845767454
SN - 9290929278
SN - 9789290929277
T3 - European Space Agency, (Special Publication) ESA SP
BT - Proceedings of the 10th International Symposium on Materials in a Space Environment and The 8th International Conference on Protection of Materials and Structures in a Space Environment
T2 - 10th International Symposium on Materials in a Space Environment and The 8th International Conference on Protection of Materials and Structures in a Space Environment
Y2 - 19 June 2006 through 23 June 2006
ER -