Nature of the adhesion bond between epoxy adhesive and titanium

The time dependence of the potential difference that appears between two VT6 titanium alloy plates separated by a mixture of epoxy resin with an epoxy hardener is studied. One of the plates is placed in epoxy resin until equilibrium is established, and the second plate is coated with an as-prepared...

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Bibliographic Details
Published in:Technical physics 2015-02, Vol.60 (2), p.246-251
Main Authors: Vettegren’, V. I., Bashkarev, A. Ya, Mamalimov, R. I., Savitskii, A. V., Shcherbakov, I. P., Sytov, V. A., Sytov, V. V.
Format: Article
Language:English
Subjects:
Adhesives
Analysis
Classical and Continuum Physics
Epoxy resins
Photoluminescence
Physics
Physics and Astronomy
Solid State
Titanium
Titanium alloys
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Summary:The time dependence of the potential difference that appears between two VT6 titanium alloy plates separated by a mixture of epoxy resin with an epoxy hardener is studied. One of the plates is placed in epoxy resin until equilibrium is established, and the second plate is coated with an as-prepared mixture of epoxy resin and a hardener. It is found that the potential difference decreases in time because of charge transfer by Ti 2+ ions through epoxy resin. Photoluminescence and infrared absorption spectra of epoxy adhesive on the VT6 alloy surface are recorded. Their analysis shows that the Ti 2+ ions having penetrated into the as-prepared mixture of epoxy resin and a hardener interact with CN groups in adhesive molecules to form coordination compounds. As a result, a diffusion layer saturated with coordination compounds forms at the alloy/adhesive interface, which leads to an increase in the strength of the adhesive.
ISSN:1063-7842
1090-6525
DOI:10.1134/S1063784215020231