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The effect of surface pretreatment on carbon fibre–polyimide matrix composite bonding
Author(s) -
Moyer Denise J. D.,
Wightman J. P.
Publication year - 1991
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.740170708
Subject(s) - composite number , composite material , wetting , materials science , adhesive , durability , wedge (geometry) , adhesive bonding , contact angle , shear strength (soil) , oxygen , direct shear test , x ray photoelectron spectroscopy , shear (geology) , chemistry , layer (electronics) , chemical engineering , physics , environmental science , organic chemistry , soil science , optics , soil water , engineering
The single lap shear test and the wedge test were used to evaluate the effect of surface pretreatment on the strength and durability of adhesively boned composite joints. Both types of joints were placed in three different environments: (1) room temperature, desiccator, 1000 h; (2) 204°C, 1000 h; (3) immersion in boiling water for 3 days for the single lap shear test and until failure for the wedge test. The failure surfaces were analyzed using XPS to determine the locus of failure. An oxygen plasma was found to be the best pretreatment. The improvement in adhesive bonding following exposure to an oxygen plasma in comparison to the other surface pretreatment was attributed to several factors—a reduction in fluorocarbon contamination caused better wetting of the composite surface and also may lead to covalent bonding at the composite/primer interface.