Metals · 2014 · 11 citations · 2 references
Natural SciencesMaterials EngineeringMaterials ScienceSurface ChemistrySurface ScienceThin FilmsAdhesive BondingPlasma Surface TreatmentPlasma-surface InteractionsSurface CharacterizationThin Film AdhesionThin-film DepositionAtmospheric PressureBondingLong-term Bond DurabilityLong-term DurabilityLong-term StabilityPlasma DepositionPlasma-assisted BondingStructural Bonding
This paper evaluates the deposition of silica layers at atmospheric pressure as a pretreatment for the structural bonding of titanium (Ti6Al4V, Ti15V3Cr3Sn3Al) in comparison to an anodizing process (NaTESi process). The SiO2 film was deposited using the LARGE plasma source, a linearly extended DC arc plasma source and applying hexamethyldisiloxane (HMDSO) as a precursor. The morphology of the surface was analyzed by means of SEM, while the characterization of the chemical composition of deposited plasma layers was done by XPS and FTIR. The long-term durability of bonded samples was evaluated by means of a wedge test in hot/wet condition. The almost stoichiometric SiO2 film features a good long-term stability and a high bonding strength compared to the films produced with the wet-chemical NaTESi process.
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