IR and Py-GC/MS investigation of composite PTFE/PEO coatings on aluminum

The data on the composition of polytetrafluoroethylene (PTFE) + Al2O3 coatings obtained on an aluminum alloy by the single-stage method of plasma electrolytic oxidation (PEO) are presented. The coatings are formed in an alkaline silicate electrolyte with introduction of dispersed PTFE particles stab...

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Bibliographic Details
Published in:Materials chemistry and physics 2019-01, Vol.221, p.436-446
Main Authors: Vaganov-Vil'kins, A.A., Rudnev, V.S., Pavlov, A.D., Sukhoverkhov, S.V., Kostin, V.I., Lukiyanchuk, I.V.
Format: Article
Language:English
Subjects:
Aluminum
Aluminum base alloys
Aluminum oxide
Caverns
Chromatography
Coatings
Comparative studies
Composition
Electric discharges
Electrolytes
Infrared spectroscopy
IR spectroscopy
Mass spectrometry
Oxidation
Plasma electrolytic oxidation
Polytetrafluoroethylene
Protective coatings
PTFE/Al2O3-Coatings
Pyrolytic chromatography
Silicon oxides
Spectrum analysis
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Summary:The data on the composition of polytetrafluoroethylene (PTFE) + Al2O3 coatings obtained on an aluminum alloy by the single-stage method of plasma electrolytic oxidation (PEO) are presented. The coatings are formed in an alkaline silicate electrolyte with introduction of dispersed PTFE particles stabilized with siloxane–acrylate emulsion. The comparative study of the surface of initial oxide and PTFE/Al2O3 coatings, dispersed PTFE powder, and dry emulsion residue has been performed by the method of IR spectroscopy. The method of pyrolytic chromatography – mass spectrometry was used to obtain the data on the composition of the emulsion dry residue, dispersed PTFE powder, and PTFE/Al2O3-coatings. The surface and the main bulk of compact polymer-like PTFE/Al2O3 coatings do not contain aluminum and silicon oxides. They consist of the products of destruction of emulsion and PTFE formed under effect of electric discharges during PEO and contain PTFE particles in pores and caverns. [Display omitted] •The electrolyte with PTFE particles and siloxane-acrylate emulsion is used.•The outer layer of the coating has a polymeric nature.•Polymer-like layer contains the products of destruction of PTFE and emulsion.
ISSN:0254-0584
1879-3312
DOI:10.1016/j.matchemphys.2018.09.029