Abstract—
The main regularities of friction and wear of surface layers of composite materials for antifriction and friction purposes have been established. It has been shown that mineral fillers modified with an organic lubricant (travertine, bentonite, tuff, marble, basalt) have a significant effect on the structure and properties of heterochain polymers based on a copolymer of formaldehyde, polyamides, and polyphenylene oxide. The developed composites are characterized by high wear-resistance (1.43–1.9 times), improved strength properties (1.5–2.0 times), and decreased friction coefficient (1.17–1.4 times) compared to the initial polymer materials that extend the opportunities of their application in modern friction units. The main mechanism of fatigue-delamination high-temperature wear of brake friction composite materials with mineral additives is revealed and based on it a physical model of the surface layer destruction is developed. It was established that the performance of these materials under conditions of high-temperature wear is determined by the stress-strain state of thin surface layers, in which tensile and compressive stresses exceeding the ultimate strength at shear act. At the stage of designing brake devices an analytical method to predict the wear resistance of friction linings was developed.
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ACKNOWLEDGMENTS
The authors are grateful to Academician of the National Academy of Sciences of Belarus Nikolai Konstantinovich Myshkin for comments on the content of the article, as well as long-term cooperation with the Armenian school of tribologists and congratulate him on his 75th birthday, sincerely wishing him health and further success in his remarkable work in the field of materials science and tribology in Belarus and in the international community of scientists.
Funding
The study was carried out with the financial support of the Science Committee of the Republic of Armenia within the scientific project Development of Technology for Producing Asbestos-Free Brake Linings for Special-Purpose Vehicles Using Waste from the Mining Industry of the Republic of Armenia in the basic problem laboratories, Tribology and Materials Science and Metallurgy National Polytechnic University of Armenia.
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Translated by K. Gumerov
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Meliksetyan, N.G., Karapetyan, A.N., Hovhannisyan, K.V. et al. Research and Prediction of Wear Resistance of Polymer Composites with Mineral Additives. J. Frict. Wear 44, 234–240 (2023). https://doi.org/10.3103/S1068366623040074
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DOI: https://doi.org/10.3103/S1068366623040074