Tribology and Materials | Volume 4 | Issue 2 | 2025 | 56-65
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https://doi.org/10.46793/tribomat.2025.010
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Mechanical and tribological properties of polymer composite materials based on PTFE filled with natural mica and magnesium aluminium oxide
Iuliia Kapitonova
1,
Praskovia Tarasova2,
Nadezhda Lazareva2,
Aitalina Okhlopkova2,
Sakhayana Danilova2
1 North-Eastern Federal University, Yakutsk, Russia
2 Harbin Institute of Technology, Harbin, China
Abstract: In this research, the results of studies on the
influence of natural mica and mixed magnesium aluminium oxide (MAO) on
the structure and properties of polytetrafluoroethylene (PTFE) are
presented. Mechanical and tribological tests were conducted on
PTFE-based composite samples. It was found that the addition of mica
increases the relative elongation by 43 % and raises the wear resistance
by 277 times compared to the initial polymer. The coefficient of
friction is from 0.24 to 0.29. At the supplementary addition of mixed
magnesium aluminium oxide, the wear resistance increases by up to 312
times and the coefficient of friction decreases by 38 %. It is shown
that, with the addition of mica alone, the relative elongation improves
and that with the additional introduction of mixed magnesium aluminium
oxide, the wear resistance of the material increases. The maximum wear
resistance is shown by the composite containing 5 wt. % mica and 1 wt. %
MAO. Investigations of the worn surface of composites have shown that
the decrease in mass loss of composites is associated with the formation
of a wear resistant surface formed during the asperity interaction. It
is revealed that the formation of a wear resistant structure on the
material's contact surface is caused by the formation of a secondary
layer and chemical reactions that occur during interaction.
Keywords: polytetrafluoroethylene, mica, magnesium aluminium oxide, composites, wear resistance.
Received: 13-05-2025, Revised: 11-06-2025, Accepted: 19-06-2025
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) license, which allows users to distribute, remix, adapt,
and build upon the material in any medium or format for non-commercial purposes only, and only so long as attribution is given to the creator.
2 Harbin Institute of Technology, Harbin, China
Abstract: In this research, the results of studies on the influence of natural mica and mixed magnesium aluminium oxide (MAO) on the structure and properties of polytetrafluoroethylene (PTFE) are presented. Mechanical and tribological tests were conducted on PTFE-based composite samples. It was found that the addition of mica increases the relative elongation by 43 % and raises the wear resistance by 277 times compared to the initial polymer. The coefficient of friction is from 0.24 to 0.29. At the supplementary addition of mixed magnesium aluminium oxide, the wear resistance increases by up to 312 times and the coefficient of friction decreases by 38 %. It is shown that, with the addition of mica alone, the relative elongation improves and that with the additional introduction of mixed magnesium aluminium oxide, the wear resistance of the material increases. The maximum wear resistance is shown by the composite containing 5 wt. % mica and 1 wt. % MAO. Investigations of the worn surface of composites have shown that the decrease in mass loss of composites is associated with the formation of a wear resistant surface formed during the asperity interaction. It is revealed that the formation of a wear resistant structure on the material's contact surface is caused by the formation of a secondary layer and chemical reactions that occur during interaction.
Keywords: polytetrafluoroethylene, mica, magnesium aluminium oxide, composites, wear resistance.
Received: 13-05-2025, Revised: 11-06-2025, Accepted: 19-06-2025
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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) license, which allows users to distribute, remix, adapt, and build upon the material in any medium or format for non-commercial purposes only, and only so long as attribution is given to the creator.