AVS 49th International Symposium
    Surface Engineering Tuesday Sessions
       Session SE+TF-TuA

Paper SE+TF-TuA10
Adhesion of Alumina-based Nanocomposites to Polymer Substrate

Tuesday, November 5, 2002, 5:00 pm, Room C-111B

Session: Systems Design of Functional Coatings
Presenter: A.G. Fedaravichus, NAMATEX System Division, Institute of Machine Reliability, Russia
Authors: A.G. Fedaravichus, NAMATEX System Division, Institute of Machine Reliability, Russia
M.V. Kireitseu, NAMATEX System Division, Institute of Machine Reliability, Russia
I.A. Nemerenco, NAMATEX System Division, Institute of Machine Reliability, Russia
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Adhesion bonding of alumina-based nanostructures to several polyimides has been studied as a function of technological parameters of the layers deposition and polymer surface modification by ion beam and chemical pretreatment. The effects of the alumina-based layer deposition method and parameters have also been examined. The materials of interest include a low thermal expansion polyimide derived from 3,3,4,4-biphenyl tetracarboxylic acid dianhydride-p-phenylene diamine (BPDA-PDA) polyamic acid, and pyromellitic dianhydride-4,4-oxydianiline (PMDA-ODA) polyimide, formed from polyamic acid or polyamide ethyl ester precursors. The alumina/polyimide adhesive strength was determined by the scratch peel test, while the interfacial regions were examined using x-ray photoelectron spectroscopy and ellipsometry. It is found that for PMDA-ODA systems, exposure to low energy Ar + and/or O2+ ions improves adhesion of the alumina-based nanooverlayer, while for BPDA-PDA polyimide, the role of O2+ is more significant. The fracture location is found to lie 20-300 A within the polymer, depending upon the ion beam dose and the specific polyimide employed.