EFFECT OF METALLIC COATING MATERIAL ON THE ADHESION, MORPHOLOGY, AND STRUCTURE OF METALLIZED POLYTETRAFLUOROETHYLENE

10.25712/ASTU.1811-1416.2026.03.008

Authors

DOI:

https://doi.org/10.25712/ASTU.1811-1416.2026.03.008

Keywords:

polytetrafluoroethylene, metallization, magnetron sputtering, metallic coatings, adhesion, wettability, surface energy

Abstract

This study investigates the effect of metallic coating material on the adhesive, morphological, structural, and surface characteristics of polytetrafluoroethylene (PTFE) modified by DC magnetron sputtering with preliminary plasma surface activation. St3 steel, titanium, and 12Kh18N10T stainless steel were used as coating materials. It was found that the deposition of metallic layers changes the microrelief and reduces the surface roughness of PTFE: the Ra parameter decreases from 2.16 µm for the pristine polymer to 1.16–1.81 µm for the metallized samples. Metallization also leads to a decrease in contact angles and an increase in free surface energy. The highest pull-off strength was achieved for the titanium coating and amounted to 0.81 MPa, which is associated with the formation of a more continuous and less discrete film morphology. The St3 coating with a thickness of about 800 nm provided the maximum shear strength of 1.28 MPa, which can be explained by mechanical interlocking of large coating fragments with the adhesive layer. According to X-ray diffraction analysis, the bulk crystalline structure of PTFE is preserved after metallization. IR spectroscopy showed no new absorption bands after pull-off tests, which is consistent with the adhesive nature of failure. The obtained results demonstrate the potential of magnetron sputtering for the formation of functional metallic coatings on the PTFE surface.

Author Biographies

Andrey Vasilev, North-Eastern Federal University named after M. K. Ammosov

Candidate of Technical Sciences, Senior Researcher of the educational, scientific and technological laboratory “Technology of polymer nanocomposites named after Associate Professor S. A. Sleptsova” of the Chemical Department of the Institute of Natural Sciences of the North-Eastern Federal University named after M. K. Ammosov.

Nadezhda Lazareva, North-Eastern Federal University named after M. K. Ammosov

Candidate of Technical Sciences, Leading Researcher of the educational, scientific and technological laboratory “Technology of polymer nanocomposites named after Associate Professor S. A. Sleptsova” of the Chemical Department of the Institute of Natural Sciences of the North-Eastern Federal University named after M. K. Ammosov.

Ulyana Khomutova, National Research Tomsk State University, Institute of High Current Electronics, Siberian Branch of the Russian Academy of Sciences

Junior Researcher of the Center for Research in Materials and Technologies of the National Research Tomsk State University; Postgraduate Student at the Institute of High Current Electronics of the Siberian Branch of the Russian Academy of Sciences.

Olesya Laput, National Research Tomsk State University

Candidate of Technical Sciences, Senior Researcher of the Center for Research in Materials and Technologies of the National Research Tomsk State University, Senior Lecturer at the Department of Natural Compounds, Pharmaceutical and Medical Chemistry of the National Research Tomsk State University

Praskovia Tarasova, North-Eastern Federal University named after M. K. Ammosov

Junior Researcher of the laboratory “Polymer Composites for the North” of the Institute of Natural Sciences of the North-Eastern Federal University named after M. K. Ammosov.

Iuliia Kapitonova, North-Eastern Federal University named after M. K. Ammosov

Candidate of Chemical Sciences, Senior Researcher of the laboratory “Polymer Composites for the North” of the Institute of Natural Sciences of the North-Easter

Aleksandr Cherkasov, Institute of High Current Electronics, Siberian Branch of the Russian Academy of Sciences

Candidate of Technical Sciences, Junior Researcher of the laboratory of Plasma Sources of the Institute of High Current Electronics of the Siberian Branch of the Russian Academy of Sciences.

Maksim Shandrikov, Institute of High Current Electronics, Siberian Branch of the Russian Academy of Sciences

Candidate of Technical Sciences, Senior Researcher of the laboratory of Plasma Sources of the Institute of High Current Electronics of the Siberian Branch of the Russian Academy of Sciences.

Dolguyaana Sidorova, North-Eastern Federal University named after M. K. Ammosov

Postgraduate Student, Junior Researcher of the laboratory “Polymer Composites for the North” of the Institute of Natural Sciences of the North-Eastern Federal University named after M. K. Ammosov.

Aitalina Okhlopkova, North-Eastern Federal University named after M. K. Ammosov

Doctor of Technical Sciences, Professor of the Chemical Department of the Institute of Natural Sciences of the North-Eastern Federal University named after M. K. Ammosov, Chief Researcher - Head of the educational, scientific and technological laboratory “Technology of Polymer Nanocomposites named after Associate Professor S. A. Sleptsova” of the Chemical Department of the Institute of Natural Sciences of the North-Eastern Federal University named after M. K. Ammosov.

Irina Kurzina, National Research Tomsk State University

Doctor of Physical and Mathematical Sciences, Director of the Center for Research in Materials and Technologies of the National Research Tomsk State University, Head of the Department of Natural Compounds, Pharmaceutical and Medical Chemistry of the National Research Tomsk State University

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Published

2026-09-29

How to Cite

Vasilev А., Lazareva Н., Khomutova У., Laput О., Tarasova П., Kapitonova Ю., Cherkasov А., Shandrikov М., Sidorova Д., Okhlopkova А., & Kurzina И. (2026). EFFECT OF METALLIC COATING MATERIAL ON THE ADHESION, MORPHOLOGY, AND STRUCTURE OF METALLIZED POLYTETRAFLUOROETHYLENE: 10.25712/ASTU.1811-1416.2026.03.008. Fundamental’nye Problemy Sovremennogo Materialovedenia / Basic Problems of Material Science, 23(3), 350–364. https://doi.org/10.25712/ASTU.1811-1416.2026.03.008

Issue

Vol. 23 No. 3 (2026): Basic Problems of Material Science

Section

SECTION 1. CONDENSED MATTER PHYSICS